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  contributor license agreements.  See the NOTICE file distributed with
  this work for additional information regarding copyright ownership.
  The ASF licenses this file to You under the Apache License, Version 2.0
  (the "License"); you may not use this file except in compliance with
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      http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
-->
<FindBugsFilter>
  <!-- Exclude the three lowest ranks -->
  <!-- Remove this exclusion is a long term goal -->
  <Match>
    <Or>
      <Rank value="20" />
      <Rank value="19" />
      <Rank value="18" />
    </Or>
  </Match>
  <!-- Considered to be false positives -->
  <Match>
    <!-- Generated by compiler -->
    <Field name="~\$SWITCH_TABLE\$.*"/>
    <Bug pattern="VO_VOLATILE_REFERENCE_TO_ARRAY"/>
  </Match>
  <Match>
    <!-- Only base null is handled by this resolver -->
    <Class name="javax.el.BeanNameELResolver"/>
    <Or>
      <Method name="getType" />
      <Method name="getValue" />
      <Method name="isReadOnly" />
      <Method name="setValue" />
    </Or>
    <Bug code="NP" />
  </Match>
  <Match>
    <!-- Class lock is not an instance lock -->
    <Class name="javax.security.auth.message.config.AuthConfigFactory"/>
    <Field name="factory"/>
    <Bug pattern="SSD_DO_NOT_USE_INSTANCE_LOCK_ON_SHARED_STATIC_DATA"/>
  </Match>
  <Match>
    <!-- Null is not possible here -->
    <Class name="javax.servlet.http.HttpServlet$NoBodyPrintWriter"/>
    <Method name="resetBuffer"/>
    <Bug pattern="NP_NULL_PARAM_DEREF"/>
  </Match>
  <Match>
    <!-- Only base null is handled by this resolver -->
    <Class name="javax.servlet.jsp.el.ImplicitObjectELResolver"/>
    <Or>
      <Method name="getType" />
      <Method name="getValue" />
      <Method name="isReadOnly" />
      <Method name="setValue" />
    </Or>
    <Bug code="NP" />
  </Match>
  <Match>
    <Class name="javax.servlet.jsp.el.ImplicitObjectELResolver$ScopeMap$ScopeEntry"/>
    <Method name="equals"/>
    <Bug code="Eq" />
  </Match>
  <Match>
    <!-- Only base null is handled by this resolver -->
    <Class name="javax.servlet.jsp.el.ScopedAttributeELResolver"/>
    <Or>
      <Method name="getType" />
      <Method name="getValue" />
      <Method name="isReadOnly" />
      <Method name="setValue" />
    </Or>
    <Bug code="NP" />
  </Match>
  <Match>
    <!--  Cannot do anything about this. API is fixed by the specification. -->
    <Class name="javax.servlet.jsp.tagext.TagData"/>
    <Bug code="CN" />
  </Match>
  <Match>
    <!-- Yes the simple name is the same as the super class. Accept it. -->
    <Class name="org.apache.catalina.Executor" />
    <Bug code="Nm" />
  </Match>
  <Match>
    <Class name="org.apache.catalina.ant.AbstractCatalinaTask"/>
    <Method name="execute"/>
    <Bug code="REC"/>
  </Match>
  <Match>
    <Class name="org.apache.catalina.ant.jmx.JMXAccessorConditionBase"/>
    <Method name="accessJMXValue"/>
    <Bug code="REC"/>
  </Match>
  <Match>
    <Class name="org.apache.catalina.authenticator.AuthenticatorBase"/>
    <Field name="sessionIdGenerator"/>
    <Bug code="IS"/>
  </Match>
  <Match>
    <!-- request.getCoyoteRequest().getRemoteUser() can be null because
    o.a.t.util.buf.MessageBytes.toString() can return NULL -->
    <Class name="org.apache.catalina.authenticator.AuthenticatorBase"/>
    <Method name="checkForCachedAuthentication"/>
    <Bug code="RCN"/>
  </Match>
  <Match>
    <!-- request.getQueryString() can be null because
    o.a.t.util.buf.MessageBytes.toString() can return NULL -->
    <Class name="org.apache.catalina.authenticator.DigestAuthenticator$DigestInfo"/>
    <Method name="validate"/>
    <Bug code="RCN"/>
  </Match>
  <Match>
    <!-- Method is synchronized therefore not an issue -->
    <Class name="org.apache.catalina.authenticator.DigestAuthenticator$NonceInfo"/>
    <Bug code="VO"/>
  </Match>
  <Match>
    <!-- request.getPathInfo(), request.getDecodedRequestURI() can return null
    because o.a.t.util.buf.MessageBytes.toString() can return NULL -->
    <Class name="org.apache.catalina.authenticator.FormAuthenticator"/>
    <Or>
      <Method name="doAuthenticate"/>
      <Method name="matchRequest"/>
    </Or>
    <Bug code="RCN"/>
  </Match>
  <Match>
    <!-- False positive. It is lifecycle state that is being protected -->
    <Class name="org.apache.catalina.authenticator.SingleSignOn" />
    <Field name="engine" />
    <Bug pattern="IS2_INCONSISTENT_SYNC" />
  </Match>
  <Match>
    <!-- req.getRemoteUser(), req.getAuthType(), request.getQueryString() can
    return null because o.a.t.util.buf.MessageBytes.toString() can return NULL
    -->
    <Class name="org.apache.catalina.connector.CoyoteAdapter"/>
    <Or>
      <Method name="doConnectorAuthenticationAuthorization"/>
      <Method name="postParseRequest"/>
    </Or>
    <Bug code="RCN"/>
  </Match>
  <Match>
    <Class name="org.apache.catalina.connector.CoyoteReader"/>
    <Method name="readLine"/>
    <Bug code="RR"/>
  </Match>
  <Match>
    <!-- request.getPathInfo(), scookie.getDomain() can return null because
    o.a.t.util.buf.MessageBytes.toString() can return NULL -->
    <Class name="org.apache.catalina.connector.Request"/>
    <Or>
      <Method name="getRequestDispatcher"/>
      <Method name="getPathTranslated"/>
      <Method name="convertCookies"/>
    </Or>
    <Bug code="RCN"/>
  </Match>
  <Match>
    <!-- the platform default encoding is a fallback when calculating the
    length of the string -->
    <Class name="org.apache.catalina.connector.Request"/>
    <Method name="parseParts"/>
    <Bug code="Dm" />
  </Match>
  <Match>
    <!-- JNI library can only be loaded once so statics are appropriate -->
    <Class name="org.apache.catalina.core.AprLifecycleListener" />
    <Bug code="ST" />
  </Match>
  <Match>
    <!-- request.getQueryString() can return null because
    o.a.t.util.buf.MessageBytes.toString() can return NULL -->
    <Class name="org.apache.catalina.core.AsyncContextImpl"/>
    <Method name="logDebug"/>
    <Bug code="RCN"/>
  </Match>
  <Match>
    <!-- Exception caught deliberately -->
    <Class name="org.apache.catalina.core.NamingContextListener" />
    <Method name="constructEnvEntry" />
    <Bug pattern="REC_CATCH_EXCEPTION" />
  </Match>
  <Match>
    <!-- Code uses same approach as CopyOnWriteArrayList -->
    <Class name="org.apache.catalina.core.StandardContext" />
    <Field name="constraints" />
    <Bug pattern="VO_VOLATILE_REFERENCE_TO_ARRAY" />
  </Match>
  <Match>
    <!-- Sync is for lifecycle state, not CookieProcessor -->
    <Class name="org.apache.catalina.core.StandardContext" />
    <Field name="cookieProcessor" />
    <Bug pattern="IS2_INCONSISTENT_SYNC" />
  </Match>
  <Match>
    <!-- Use of new String() is deliberate -->
    <Class name="org.apache.catalina.core.StandardContext" />
    <Method name="setResponseCharacterEncoding" />
    <Bug pattern="DM_STRING_CTOR" />
  </Match>
  <Match>
    <!-- Calling sleep while holding a lock is deliberate -->
    <Class name="org.apache.catalina.core.StandardContext" />
    <Method name="stopInternal" />
    <Bug pattern="SWL_SLEEP_WITH_LOCK_HELD" />
  </Match>
  <Match>
    <!-- Have to trigger GC for leak detection to work. Clearly documented -->
    <Class name="org.apache.catalina.core.StandardHost" />
    <Method name="findReloadedContextMemoryLeaks" />
    <Bug code="Dm" />
  </Match>
  <Match>
    <!-- Random will be used multiple times if required. -->
    <Class name="org.apache.catalina.core.StandardServer"/>
    <Method name="await"/>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <!-- This could be optimised but a) the code would be less clear and -->
    <!-- b) SpotBugs still reports an error with the optimised code.     -->
    <Class name="org.apache.catalina.core.StandardServer"/>
    <Method name="startPeriodicLifecycleEvent"/>
    <Bug pattern="RpC_REPEATED_CONDITIONAL_TEST "/>
  </Match>
  <Match>
    <!-- Sync not targeting these fields -->
    <Class name="org.apache.catalina.core.StandardWrapper" />
    <Or>
      <Field name="multipartConfigElement" />
      <Field name="servletClass" />
      <Field name="swallowOutput" />
      <Field name="unloadDelay" />
    </Or>
    <Bug pattern="IS2_INCONSISTENT_SYNC" />
  </Match>
  <Match>
    <!-- There is only a single wait condition -->
    <Class name="org.apache.catalina.core.StandardWrapper" />
    <Method name="deallocate" />
    <Bug pattern="NO_NOTIFY_NOT_NOTIFYALL" />
  </Match>
  <Match>
    <!-- Sleep is of short duration and lock is required -->
    <Class name="org.apache.catalina.core.StandardWrapper" />
    <Method name="unload" />
    <Bug code="SWL" />
  </Match>
  <Match>
    <!-- null return value is documented -->
    <Class name="org.apache.catalina.core.StandardWrapper" />
    <Method name="isSingleThreadModel" />
    <Bug pattern="NP_BOOLEAN_RETURN_NULL" />
  </Match>
  <Match>
    <!-- The code is adding HTTP request headers, not parameters and the
         header parsing on input will have removed any CR or LF characters. -->
    <Class name="org.apache.catalina.filters.CorsFilter" />
    <Method name="addStandardHeaders" />
    <Bug pattern="HRS_REQUEST_PARAMETER_TO_HTTP_HEADER" />
  </Match>
  <Match>
    <!-- Random will be SecureRandom by default and will be used multiple
         times. -->
    <Class name="org.apache.catalina.filters.CsrfPreventionFilterBase"/>
    <Method name="generateNonce"/>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <!-- ParseException is ignored in loop but handled afterwards if all formats failed -->
    <Class name="org.apache.catalina.filters.RemoteIpFilter$XForwardedRequest" />
    <Method name="getDateHeader" />
    <Bug code="DE" />
  </Match>
  <Match>
    <!-- False positive. It is lifecycle state that is being protected -->
    <Class name="org.apache.catalina.ha.authenticator.ClusterSingleSignOn" />
    <Field name="cluster" />
    <Bug pattern="IS2_INCONSISTENT_SYNC" />
  </Match>
  <Match>
    <!-- shost will not be null in normal usage -->
    <Class name="org.apache.catalina.ha.backend.CollectedInfo" />
    <Method name="init" />
    <Bug code="NP" />
  </Match>
  <Match>
    <!-- Ignore IOException when closing input/output streams in cleanup -->
    <Class name="org.apache.catalina.ha.deploy.FileMessageFactory" />
    <Method name="cleanup" />
    <Bug code="DE" />
  </Match>
  <Match>
    <!-- Ignore exceptions from Thread.sleep() -->
    <Class name="org.apache.catalina.ha.session.DeltaManager" />
    <Or>
      <Method name="handleGET_ALL_SESSIONS" />
      <Method name="waitForSendAllSessions" />
    </Or>
    <Bug code="DE" />
  </Match>
  <Match>
    <!-- False positive caused by additional method syncs -->
    <Class name="org.apache.catalina.ha.session.DeltaManager" />
    <Field name="receiverQueue" />
    <Pattern code="IS2_INCONSISTENT_SYNC" />
  </Match>
  <Match>
    <!-- False positive caused by method syncs -->
    <Class name="org.apache.catalina.ha.session.JvmRouteBinderValve" />
    <Field name="cluster" />
    <Pattern code="IS2_INCONSISTENT_SYNC" />
  </Match>
  <Match>
    <!-- Design choice to reduce need for syncs -->
    <Class name="org.apache.catalina.ha.tcp.ReplicationValve" />
    <Or>
      <Field name="nrOfCrossContextSendRequests" />
      <Field name="nrOfFilterRequests" />
      <Field name="nrOfRequests" />
      <Field name="nrOfSendRequests" />
    </Or>
    <Pattern code="VO_VOLATILE_INCREMENT" />
  </Match>
  <Match>
    <!-- Thread never executed so empty run method not an issue -->
    <Class name="org.apache.catalina.loader.WebappClassLoaderBase" />
    <Method name="clearReferences" />
    <Bug pattern="DM_USELESS_THREAD" />
  </Match>
  <Match>
    <!-- Field is only modified during Servlet load -->
    <Class name="org.apache.catalina.manager.host.HostManagerServlet" />
    <Or>
      <Field name="context" />
      <Field name="installedHost" />
      <Field name="engine" />
      <Field name="wrapper" />
    </Or>
    <Bug pattern="MSF_MUTABLE_SERVLET_FIELD" />
  </Match>
  <Match>
    <!-- Catching exception is simpler than handling all the individual ones -->
    <Class name="org.apache.catalina.manager.util.SessionUtils" />
    <Method name="guessLocaleFromSession" />
    <Bug code="REC" />
  </Match>
  <Match>
    <!-- The fields are only set in setWrapper() which Tomcat calls once during
         initialisation. All other accesses are reads. -->
    <Class name="org.apache.catalina.manager.ManagerServlet" />
    <Or>
      <Field name="context" />
      <Field name="host" />
      <Field name="mBeanServer" />
      <Field name="oname" />
      <Field name="wrapper" />
    </Or>
    <Bug pattern="MSF_MUTABLE_SERVLET_FIELD" />
  </Match>
  <Match>
    <!-- The array contents is never mutated. -->
    <Class name="org.apache.catalina.mapper.Mapper" />
    <Field name="hosts" />
    <Bug pattern="VO_VOLATILE_REFERENCE_TO_ARRAY" />
  </Match>
  <Match>
    <!-- The array contents is never mutated. -->
    <Class name="org.apache.catalina.mapper.Mapper$MappedContext" />
    <Field name="versions" />
    <Bug pattern="VO_VOLATILE_REFERENCE_TO_ARRAY" />
  </Match>
  <Match>
    <!-- Not catching NPE would require generating an NPE and then wrapping
         it because there is no MBeanException(String) constructor. It is
         cleaner to catch the NPE. -->
    <Class name="org.apache.catalina.mbeans.ContainerMBean" />
    <Method name="removeValve" />
    <Bug pattern="DCN_NULLPOINTER_EXCEPTION" />
  </Match>
  <Match>
    <!-- SQL construction is safe since it is from trusted config -->
    <Or>
      <Class name="org.apache.catalina.realm.DataSourceRealm" />
      <Class name="org.apache.catalina.realm.JDBCRealm" />
    </Or>
    <Or>
      <Method name="credentials" />
      <Method name="getPassword" />
      <Method name="getRoles" />
      <Method name="roles" />
    </Or>
    <Bug pattern="SQL_PREPARED_STATEMENT_GENERATED_FROM_NONCONSTANT_STRING" />
  </Match>
  <Match>
    <!-- Use of == rather than equals() is deliberate. -->
    <Class name="org.apache.catalina.realm.DigestCredentialHandlerBase"/>
    <Method name="equals"/>
    <Bug pattern="ES_COMPARING_PARAMETER_STRING_WITH_EQ"/>
  </Match>
  <Match>
    <Class name="org.apache.catalina.realm.JDBCRealm" />
    <Field name="containerLog" />
    <Bug code="IS" />
  </Match>
  <Match>
    <!-- Sync is protecting preparedRoles, not these fields -->
    <Class name="org.apache.catalina.realm.JDBCRealm" />
    <Or>
      <Field name="roleNameCol" />
      <Field name="userRoleTable" />
    </Or>
    <Bug pattern="IS2_INCONSISTENT_SYNC " />
  </Match>
  <Match>
    <!-- Random will be SecureRandom and will be used multiple times. -->
    <Class name="org.apache.catalina.realm.DigestCredentialHandlerBase"/>
    <Method name="mutate"/>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <!-- Safer to catch NPE as the root cause of NPEs is not clear -->
    <Class name="org.apache.catalina.realm.JNDIRealm" />
    <Or>
      <Method name="authenticate" />
      <Method name="getPassword" />
    </Or>
    <Bug pattern="DCN_NULLPOINTER_EXCEPTION" />
  </Match>
  <Match>
    <!-- roles will be initialized in addAttributeValues -->
    <Class name="org.apache.catalina.realm.JNDIRealm" />
    <Or>
      <Method name="getUserByPattern" />
      <Method name="getUserBySearch" />
    </Or>
    <Bug code="NP" />
  </Match>
  <Match>
    <!-- Sync is protecting authenticate90, not this field -->
    <Class name="org.apache.catalina.realm.JNDIRealm" />
    <Field name="userPatternFormatArray" />
    <Bug pattern="IS2_INCONSISTENT_SYNC " />
  </Match>
  <Match>
    <!-- Class lock is not an instance lock -->
    <Class name="org.apache.catalina.realm.MemoryRealm" />
    <Field name="digester"/>
    <Bug pattern="SSD_DO_NOT_USE_INSTANCE_LOCK_ON_SHARED_STATIC_DATA"/>
  </Match>
  <Match>
    <!-- request.getRequestPathMB(), request.getQueryString() can be null because
    o.a.t.util.buf.MessageBytes.toString() can return NULL -->
    <Class name="org.apache.catalina.realm.RealmBase"/>
    <Or>
      <Method name="findSecurityConstraints"/>
      <Method name="hasUserDataPermission"/>
    </Or>
    <Bug code="RCN"/>
  </Match>
  <Match>
    <!-- If encoding is specified it will be used,
    otherwise platform default encoding will be used -->
    <Class name="org.apache.catalina.realm.RealmBase"/>
    <Method name="Digest"/>
    <Bug code="Dm" />
  </Match>
  <Match>
  <!-- The stream is closed in the thread  -->
    <Class name="org.apache.catalina.servlets.CGIServlet$CGIRunner" />
    <Method name="run" />
    <Bug pattern="OS_OPEN_STREAM" />
  </Match>
  <Match>
  <!-- The header value is safe  -->
    <Class name="org.apache.catalina.servlets.DefaultServlet" />
    <Method name="doDirectoryRedirect" />
    <Bug pattern="HRS_REQUEST_PARAMETER_TO_HTTP_HEADER" />
  </Match>
  <Match>
    <!-- If encoding is specified it will be used,
    otherwise platform default encoding will be used -->
    <Class name="org.apache.catalina.servlets.DefaultServlet"/>
    <Or>
      <Method name="copy"/>
      <Method name="getReadme"/>
    </Or>
    <Bug code="Dm" />
  </Match>
  <Match>
    <!-- The use of != with a String is a deliberate hack  -->
    <Class name="org.apache.catalina.servlets.DefaultServlet" />
    <Method name="serveResource" />
    <Bug pattern="ES_COMPARING_STRINGS_WITH_EQ" />
  </Match>
  <Match>
    <!-- Non-constant strings are configuration settings rather than client
         supplied -->
    <Class name="org.apache.catalina.session.DataSourceStore" />
    <Or>
      <Method name="clear" />
      <Method name="getSize" />
      <Method name="keys" />
      <Method name="load" />
      <Method name="remove" />
      <Method name="save" />
    </Or>
    <Bug pattern="SQL_PREPARED_STATEMENT_GENERATED_FROM_NONCONSTANT_STRING" />
  </Match>
  <Match>
    <!-- Non-constant strings are configuration settings rather than client
         supplied -->
    <Class name="org.apache.catalina.session.JDBCStore" />
    <Or>
      <Method name="clear" />
      <Method name="getSize" />
      <Method name="keys" />
      <Method name="load" />
      <Method name="remove" />
      <Method name="save" />
    </Or>
    <Bug pattern="SQL_PREPARED_STATEMENT_GENERATED_FROM_NONCONSTANT_STRING" />
  </Match>
  <Match>
    <!-- Syncs aren't intended to protect these fields -->
    <Class name="org.apache.catalina.session.JDBCStore" />
    <Or>
      <Field name="dataSourceName" />
      <Field name="sessionAppCol" />
      <Field name="sessionIdCol" />
    </Or>
    <Bug pattern="IS2_INCONSISTENT_SYNC" />
  </Match>
  <Match>
    <!-- We can live with the threading issue. See code comment for details. -->
    <Class name="org.apache.catalina.session.ManagerBase" />
    <Method name="generateSessionId" />
    <Bug code="VO" />
  </Match>
  <Match>
    <!-- These fields should not be serialized with the session -->
    <Class name="org.apache.catalina.session.StandardSession" />
    <Or>
      <Field name="listeners" />
      <Field name="notes" />
      <Field name="support" />
    </Or>
    <Bug pattern="SE_TRANSIENT_FIELD_NOT_RESTORED" />
  </Match>
  <Match>
    <!-- Use of null is deliberate -->
    <Class name="org.apache.catalina.ssi.ExpressionParseTree" />
    <Method name="pushOpp" />
    <Bug code="NP" />
  </Match>
  <Match>
    <!-- If encoding is specified it will be used,
    otherwise platform default encoding will be used -->
    <Class name="org.apache.catalina.ssi.SSIServlet"/>
    <Method name="processSSI"/>
    <Bug code="Dm" />
  </Match>
  <Match>
    <!-- If encoding is specified it will be used,
    otherwise platform default encoding will be used -->
    <Class name="org.apache.catalina.ssi.SSIServletExternalResolver"/>
    <Method name="getFileText"/>
    <Bug code="Dm" />
  </Match>
  <Match>
    <!-- Dead store is deliberate to test URL validity -->
    <Class name="org.apache.catalina.startup.Bootstrap" />
    <Method name="createClassLoader" />
    <Bug pattern="DLS_DEAD_LOCAL_STORE" />
  </Match>
  <Match>
    <!-- Failure at this point is fatal -->
    <Class name="org.apache.catalina.startup.Bootstrap" />
    <Method name="initClassLoaders" />
    <Bug pattern="DM_EXIT" />
  </Match>
  <Match>
    <!-- Genric error handling -->
    <Class name="org.apache.catalina.startup.Catalina" />
    <Method name="parseServerXml" />
    <Bug pattern="REC_CATCH_EXCEPTION" />
  </Match>
  <Match>
    <!-- Catalina isn't used when embedding -->
    <Class name="org.apache.catalina.startup.Catalina" />
    <Method name="stopServer" />
    <Bug code="Dm" />
  </Match>
  <Match>
    <!-- The stream is closed in WebXmlParser.parseWebXml -->
    <Class name="org.apache.catalina.startup.ContextConfig" />
    <Or>
      <Method name="getContextWebXmlSource" />
      <Method name="getWebXmlSource" />
    </Or>
    <Bug code="OBL" />
  </Match>
  <Match>
    <!-- There is no null check (SpotBugs bug?) -->
    <Class name="org.apache.catalina.startup.ContextConfig" />
    <Method name="populateJavaClassCache" />
    <Bug pattern="NP_LOAD_OF_KNOWN_NULL_VALUE" />
  </Match>
  <Match>
    <!-- Method checks result and logs error later -->
    <Class name="org.apache.catalina.startup.ExpandWar" />
    <Method name="deleteDir" />
    <Bug pattern="RV_RETURN_VALUE_IGNORED_BAD_PRACTICE" />
  </Match>
  <Match>
    <!-- Sleep is short, needs to keep lock -->
    <Class name="org.apache.catalina.startup.HostConfig" />
    <Method name="checkResources" />
    <Bug code="SWL" />
  </Match>
  <Match>
    <!-- context is never null -->
    <Class name="org.apache.catalina.startup.HostConfig" />
    <Or>
      <Method name="deployDescriptor" />
      <Method name="deployDirectory" />
      <Method name="deployWAR" />
    </Or>
    <Bug code="NP" />
  </Match>
  <Match>
    <!-- Domain resolution not an issue here -->
    <Class name="org.apache.catalina.startup.WebappServiceLoader" />
    <Method name="load" />
    <Bug pattern="DMI_COLLECTION_OF_URLS" />
  </Match>
  <Match>
    <!-- If old -> save worked, assume save -> old will to -->
    <Class name="org.apache.catalina.storeconfig.StoreFileMover" />
    <Method name="move" />
    <Bug pattern="RV_RETURN_VALUE_IGNORED_BAD_PRACTICE" />
  </Match>
  <Match>
    <!-- Monitor only used for election -->
    <Class name="org.apache.catalina.tribes.group.interceptors.NonBlockingCoordinator"/>
    <Method name="startElection"/>
    <Bug pattern="WA_NOT_IN_LOOP"/>
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/>
    <Method name="memberAlive"/>
    <Bug code="DE"/>
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.group.ChannelCoordinator"/>
    <Field name="membershipService"/>
    <Bug pattern="IS2_INCONSISTENT_SYNC"/>
  </Match>
  <Match>
    <!-- This could be optimised but a) the code would be less clear and -->
    <!-- b) SpotBugs still reports an error with the optimised code.     -->
    <Class name="org.apache.catalina.tribes.group.GroupChannel"/>
    <Method name="startHeartbeat"/>
    <Bug pattern="RpC_REPEATED_CONDITIONAL_TEST "/>
  </Match>
  <Match>
    <!-- False positive. It is lifecycle state that is being protected -->
    <Class name="org.apache.catalina.tribes.group.GroupChannel" />
    <Field name="utilityExecutor" />
    <Bug pattern="IS2_INCONSISTENT_SYNC" />
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.group.RpcChannel"/>
    <Method name="send"/>
    <Bug pattern="WA_NOT_IN_LOOP"/>
  </Match>
  <Match>
    <!-- Class lock is not an instance lock -->
    <Class name="org.apache.catalina.tribes.io.BufferPool" />
    <Field name="instance"/>
    <Bug pattern="SSD_DO_NOT_USE_INSTANCE_LOCK_ON_SHARED_STATIC_DATA"/>
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.membership.McastServiceImpl"/>
    <Method name="stop"/>
    <Bug code="DE"/>
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.membership.McastServiceImpl$ReceiverThread"/>
    <Method name="run"/>
    <Bug code="DE"/>
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.membership.McastServiceImpl$RecoveryThread"/>
    <Method name="run"/>
    <Bug code="NS"/>
  </Match>
  <Match>
    <!-- Sync is to protect construction of data not individual fields -->
    <Class name="org.apache.catalina.tribes.membership.MemberImpl"/>
    <Or>
      <Method name="getCommand"/>
      <Method name="getDomain"/>
      <Method name="getHost"/>
      <Method name="getPayload"/>
      <Method name="getPort"/>
      <Method name="getSecurePort"/>
      <Method name="getUdpPort"/>
      <Method name="getUniqueId"/>
    </Or>
    <Bug pattern="UG_SYNC_SET_UNSYNC_GET"/>
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.membership.MemberImpl"/>
    <Field name="dataPkg"/>
    <Bug pattern="IS2_INCONSISTENT_SYNC"/>
  </Match>
  <Match>
    <!-- Byte arrays contents are not mutated -->
    <Class name="org.apache.catalina.tribes.membership.MemberImpl"/>
    <Or>
      <Field name="command"/>
      <Field name="domain"/>
      <Field name="host"/>
      <Field name="payload"/>
      <Field name="uniqueId"/>
    </Or>
    <Bug pattern="VO_VOLATILE_REFERENCE_TO_ARRAY"/>
  </Match>
  <Match>
    <!-- lock is in clone so this is safe -->
    <Class name="org.apache.catalina.tribes.membership.Membership" />
    <Method name="clone" />
    <Bug pattern="ML_SYNC_ON_FIELD_TO_GUARD_CHANGING_THAT_FIELD" />
  </Match>
  <Match>
    <!-- Byte arrays contents are not mutated -->
    <Class name="org.apache.catalina.tribes.membership.Membership" />
    <Field name="members"/>
    <Bug pattern="VO_VOLATILE_REFERENCE_TO_ARRAY"/>
  </Match>
  <Match>
    <!--  Fields are always recalculated on access -->
    <Class name="org.apache.catalina.tribes.tipis.AbstractReplicatedMap$MapMessage" />
    <Or>
      <Field name="key" />
      <Field name="value" />
    </Or>
    <Bug pattern="SE_TRANSIENT_FIELD_NOT_RESTORED" />
  </Match>
  <Match>
    <!-- Sync is not intended to protect access to this field -->
    <Class name="org.apache.catalina.tribes.transport.ReplicationTransmitter"/>
    <Field name="oname"/>
    <Bug pattern="IS2_INCONSISTENT_SYNC"/>
  </Match>
  <Match>
    <!-- Intentional in case thread is waiting -->
    <Class name="org.apache.catalina.tribes.transport.RxTaskPool"/>
    <Method name="returnWorker"/>
    <Bug code="NN"/>
  </Match>
  <Match>
    <!-- Sync is to protect multiple against calls to connect() -->
    <Class name="org.apache.catalina.tribes.transport.nio.NioSender"/>
    <Or>
      <Field name="dataChannel"/>
      <Field name="socketChannel"/>
      <Field name="writebuf"/>
    </Or>
    <Bug pattern="IS2_INCONSISTENT_SYNC"/>
  </Match>
  <Match>
    <!-- Byte arrays contents are not mutated -->
    <Class name="org.apache.catalina.tribes.transport.nio.NioSender"/>
    <Field name="current"/>
    <Bug pattern="VO_VOLATILE_REFERENCE_TO_ARRAY"/>
  </Match>
  <Match>
    <!-- Random is SecureRandom and will be used multiple times. -->
    <Class name="org.apache.catalina.tribes.util.UUIDGenerator"/>
    <Or>
      <Method name="&lt;clinit&gt;"/>
      <Method name="nextBytes"/>
    </Or>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <!-- Expected. Statement is being generated from configuration. -->
    <Class name="org.apache.catalina.users.DataSourceUserDatabase"/>
    <Or>
      <Method name="findGroupInternal"/>
      <Method name="findRoleInternal"/>
      <Method name="findUserInternal"/>
      <Method name="getGroups"/>
      <Method name="getRoles"/>
      <Method name="getUsers"/>
      <Method name="saveInternal"/>
    </Or>
    <Bug pattern="SQL_PREPARED_STATEMENT_GENERATED_FROM_NONCONSTANT_STRING"/>
  </Match>
  <Match>
    <!-- All modifications wrapped with appropriate locks -->
    <Class name="org.apache.catalina.users.DataSourceUserDatabase"/>
    <Or>
      <Method name="modifiedGroup"/>
      <Method name="modifiedRole"/>
      <Method name="modifiedUser"/>
    </Or>
    <Bug pattern="AT_OPERATION_SEQUENCE_ON_CONCURRENT_ABSTRACTION"/>
  </Match>
  <Match>
    <Class name="org.apache.catalina.util.LifecycleBase" />
    <Method name="getState"/>
    <Bug code="UG" />
  </Match>
  <Match>
    <!-- Random is SecureRandom and will be used multiple times. -->
    <Class name="org.apache.catalina.util.SessionIdGeneratorBase"/>
    <Method name="createSecureRandom"/>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <!-- the platform default encoding is a fallback -->
    <Class name="org.apache.catalina.util.URLEncoder"/>
    <Method name="encode"/>
    <Bug code="Dm" />
  </Match>
  <Match>
    <!-- request.getRemoteHost() can be null because
    o.a.t.util.buf.MessageBytes.toString() can return NULL -->
    <Class name="org.apache.catalina.valves.AbstractAccessLogValve$HostElement"/>
    <Method name="addElement"/>
    <Bug code="RCN"/>
  </Match>
  <Match>
    <!-- request.getMethod() can be null because
    o.a.t.util.buf.MessageBytes.toString() can return NULL -->
    <Class name="org.apache.catalina.valves.AbstractAccessLogValve$RequestElement"/>
    <Method name="addElement"/>
    <Bug code="RCN"/>
  </Match>
  <Match>
    <!-- Syncs are there to protect state not context -->
    <Class name="org.apache.catalina.valves.HealthCheckValve" />
    <Field name="context" />
    <Bug pattern="IS2_INCONSISTENT_SYNC" />
  </Match>
  <Match>
    <!-- Non-constant strings are configuration settings rather than client
         supplied -->
    <Class name="org.apache.catalina.valves.JDBCAccessLogValve" />
    <Method name="open" />
    <Bug code="SQL" />
  </Match>
  <Match>
    <!-- NO-OPs due to remaining FIXMEs -->
    <Class name="org.apache.catalina.valves.rewrite.ResolverImpl"/>
    <Method name="resolveSsl"/>
    <Or>
      <Bug pattern="DLS_DEAD_LOCAL_STORE"/>
      <Bug pattern="RV_RETURN_VALUE_IGNORED"/>
    </Or>
  </Match>
  <Match>
    <!-- request.getQueryString() can be null because
    o.a.t.util.buf.MessageBytes.toString() can return NULL -->
    <Class name="org.apache.catalina.valves.rewrite.RewriteValve"/>
    <Method name="invoke"/>
    <Bug code="RCN"/>
  </Match>
  <Match>
    <!-- request.getQueryString() can be null because
    o.a.t.util.buf.MessageBytes.toString() can return NULL -->
    <Class name="org.apache.catalina.valves.StuckThreadDetectionValve"/>
    <Method name="invoke"/>
    <Bug code="RCN"/>
  </Match>
  <Match>
    <!-- There is no null check (SpotBugs bug?) -->
    <Class name="org.apache.catalina.webresources.AbstractArchiveResource" />
    <Method name="getContent" />
    <Bug pattern="NP_LOAD_OF_KNOWN_NULL_VALUE" />
  </Match>
  <Match>
    <!-- Array contents is not mutated -->
    <Class name="org.apache.catalina.webresources.CachedResource"/>
    <Or>
      <Field name="webResources"/>
      <Field name="cachedContent"/>
    </Or>
    <Bug pattern="VO_VOLATILE_REFERENCE_TO_ARRAY"/>
  </Match>
  <Match>
    <!-- Class lock is not an instance lock -->
    <Class name="org.apache.catalina.webresources.TomcatURLStreamHandlerFactory"/>
    <Field name="instance"/>
    <Bug pattern="SSD_DO_NOT_USE_INSTANCE_LOCK_ON_SHARED_STATIC_DATA"/>
  </Match>
  <Match>
    <!-- Switch fall-though is deliberate -->
    <Class name="org.apache.coyote.AbstractProcessor"/>
    <Method name="parseHost"/>
    <Bug pattern="SF_SWITCH_FALLTHROUGH" />
  </Match>
  <Match>
    <!-- Use of synchronisation is required to make a sequence of calls in   -->
    <!-- one method appear to be atomic.                                     -->
    <Class name="org.apache.coyote.AbstractProcessorLight"/>
    <Or>
      <Method name="addDispatch"/>
      <Method name="getIteratorAndClearDispatches"/>
      <Method name="clearDispatches"/>
    </Or>
    <Bug pattern="JLM_JSR166_UTILCONCURRENT_MONITORENTER" />
  </Match>
  <Match>
    <!-- This could be optimised but a) the code would be less clear and -->
    <!-- b) SpotBugs still reports an error with the optimised code.     -->
    <Class name="org.apache.coyote.AbstractProtocol"/>
    <Method name="startAsyncTimeout"/>
    <Bug pattern="RpC_REPEATED_CONDITIONAL_TEST "/>
  </Match>
  <Match>
    <!-- Correct behaviour does not assume sequential operations on concurrent
         hash map are atomic. -->
    <Class name="org.apache.coyote.AbstractProtocol$AbstractConnectionHandler" />
    <Method name="process" />
    <Bug pattern="AT_OPERATION_SEQUENCE_ON_CONCURRENT_ABSTRACTION" />
  </Match>
  <Match>
    <!-- readChunk will not be null due to previous call to readBytes() -->
    <Class name="org.apache.coyote.http11.filters.ChunkedInputFilter" />
    <Method name="parseHeader"/>
    <Bug pattern="RCN_REDUNDANT_NULLCHECK_WOULD_HAVE_BEEN_A_NPE" />
  </Match>
  <Match>
    <!-- Locks are always released. Non-standard pattern is required because -->
    <!-- of lock upgrade that is used. -->
    <Class name="org.apache.coyote.http11.upgrade.AprServletInputStream" />
    <Method name="doRead"/>
    <Bug code="UL" />
  </Match>
  <Match>
    <!-- Locks are always released. Non-standard pattern is required because -->
    <!-- of lock upgrade that is used. -->
    <Class name="org.apache.coyote.http11.upgrade.AprServletOutputStream" />
    <Method name="doWrite"/>
    <Bug code="UL"  />
  </Match>
  <Match>
    <!-- Fall-through expected -->
    <Class name="org.apache.coyote.http11.Http11Processor" />
    <Method name="service"/>
    <Bug code="SF" />
  </Match>
  <Match>
    <!-- Locks are always released. Non-standard pattern is required because -->
    <!-- of lock upgrade that is used. -->
    <Class name="org.apache.coyote.http11.InternalAprInputBuffer" />
    <Method name="doReadSocket"/>
    <Bug code="UL" />
  </Match>
  <Match>
    <!-- Locks are always released. Non-standard pattern is required because -->
    <!-- of lock upgrade that is used. -->
    <Class name="org.apache.coyote.http11.InternalAprOutputBuffer" />
    <Method name="writeToSocket"/>
    <Bug code="UL" />
  </Match>
  <Match>
    <!-- HpackDecoder is used by multiple streams but not concurrently. -->
    <Class name="org.apache.coyote.http2.HpackDecoder" />
    <Method name="emitHeader" />
    <Bug pattern="VO_VOLATILE_INCREMENT" />
  </Match>
  <Match>
    <!-- Number being tested is unsigned. -->
    <Class name="org.apache.coyote.http2.Http2UpgradeHandler" />
    <Method name="createRemoteStream" />
    <Bug pattern="IM_BAD_CHECK_FOR_ODD" />
  </Match>
  <Match>
    <!-- Loss of the occasional increment is acceptable. -->
    <Class name="org.apache.coyote.http2.Http2UpgradeHandler" />
    <Method name="pruneClosedStreams" />
    <Bug pattern="VO_VOLATILE_INCREMENT" />
  </Match>
  <Match>
    <!-- Notify is correct. Condition changed outside of this method. -->
    <Class name="org.apache.coyote.http2.Http2UpgradeHandler" />
    <Method name="incrementWindowSize" />
    <Or>
      <Bug pattern="NN_NAKED_NOTIFY" />
      <Bug pattern="NO_NOTIFY_NOT_NOTIFYALL" />
    </Or>
  </Match>
  <Match>
    <!-- Return value is intentionally ignored. -->
    <Class name="org.apache.coyote.http2.Http2UpgradeHandler$PingManager" />
    <Method name="receivePing" />
    <Bug pattern="RV_RETURN_VALUE_IGNORED" />
  </Match>
  <Match>
    <!-- Notify is correct. Condition changed outside of this method. -->
    <Class name="org.apache.coyote.http2.Stream" />
    <Or>
      <Method name="cancelAllocationRequests" />
      <Method name="incrementWindowSize" />
    </Or>
    <Or>
      <Bug pattern="NN_NAKED_NOTIFY" />
      <Bug pattern="NO_NOTIFY_NOT_NOTIFYALL" />
    </Or>
  </Match>
  <Match>
    <!-- Monitor is used for a single condition. -->
    <Class name="org.apache.coyote.http2.WindowAllocationManager" />
    <Method name="notify" />
    <Bug pattern="NO_NOTIFY_NOT_NOTIFYALL" />
  </Match>
  <Match>
    <!-- Monitor is used for a single condition. -->
    <Class name="org.apache.coyote.http2.WindowAllocationManager" />
    <Method name="waitFor" />
    <Bug pattern="WA_NOT_IN_LOOP" />
  </Match>
  <Match>
    <!-- Returning null is required by the EL specification -->
    <Class name="org.apache.el.lang.ELSupport" />
    <Method name="coerceToBoolean"/>
    <Bug pattern="NP_BOOLEAN_RETURN_NULL"/>
  </Match>
  <Match>
    <!-- Result is negated because arguments have to be swapped -->
    <Class name="org.apache.el.lang.ELSupport" />
    <Method name="compare"/>
    <Bug pattern="RV_NEGATING_RESULT_OF_COMPARETO"/>
  </Match>
  <Match>
    <!-- JspC will not be used under a security manager -->
    <Class name="org.apache.jasper.JspC"/>
    <Method name="initClassLoader"/>
    <Bug code="DP" />
  </Match>
  <Match>
    <!-- Parser config is static so statics are appropriate -->
    <Class name="org.apache.jasper.JspC"/>
    <Method name="setValidateXml"/>
    <Bug code="ST" />
  </Match>
  <Match>
    <!-- If encoding is specified it will be used,
    otherwise platform default encoding will be used -->
    <Class name="org.apache.jasper.JspC"/>
    <Or>
      <Method name="openWebxmlReader"/>
      <Method name="openWebxmlWriter"/>
    </Or>
    <Bug code="Dm" />
  </Match>
  <Match>
    <!-- Node constructors add node to parent. Local variable is used to
         silence an Eclipse warning -->
    <Class name="org.apache.jasper.compiler.ELFunctionMapper"/>
    <Method name="map"/>
    <Bug pattern="DLS_DEAD_LOCAL_STORE"/>
  </Match>
  <Match>
    <!-- There is no null check (SpotBugs bug?) -->
    <Class name="org.apache.jasper.compiler.JDTCompiler$1" />
    <Method name="findType" />
    <Bug pattern="NP_LOAD_OF_KNOWN_NULL_VALUE" />
  </Match>
  <Match>
    <!-- Sync is not protecting these fields -->
    <Class name="org.apache.jasper.compiler.JspConfig"/>
    <Or>
      <Field name="defaultDeferedSyntaxAllowedAsLiteral" />
      <Field name="defaultIsELIgnored" />
    </Or>
    <Bug pattern="IS2_INCONSISTENT_SYNC"/>
  </Match>
  <Match>
    <!-- NPE is not possible -->
    <Class name="org.apache.jasper.compiler.JspConfig"/>
    <Method name="selectProperty"/>
    <Bug code="NP"/>
  </Match>
  <Match>
    <!-- Yes this is a dead store. This is so the IDE warning can be suppressed.
         The object creation has side-effects so the code is required. -->
    <Class name="org.apache.jasper.compiler.JspDocumentParser" />
    <Or>
      <Method name="comment"/>
      <Method name="processChars"/>
    </Or>
    <Bug pattern="DLS_DEAD_LOCAL_STORE"/>
  </Match>
  <Match>
    <!-- Returning null is intentional -->
    <Class name="org.apache.jasper.compiler.JspReader"/>
    <Method name="indexOf"/>
    <Bug code="NP"/>
  </Match>
  <Match>
    <!-- Node constructors add node to parent. Local variable is used to
         silence an Eclipse warning -->
    <Class name="org.apache.jasper.compiler.Parser"/>
    <Bug code="DLS"/>
  </Match>
  <Match>
    <!-- Use of == is deliberate -->
    <Class name="org.apache.jasper.compiler.Parser"/>
    <Method name="parseBody"/>
    <Bug code="ES"/>
  </Match>
  <Match>
    <!-- Only base null is handled by this resolver -->
    <Class name="org.apache.jasper.el.ELResolverImpl"/>
    <Or>
      <Method name="getType" />
      <Method name="getValue" />
      <Method name="isReadOnly" />
      <Method name="setValue" />
    </Or>
    <Bug code="NP" />
  </Match>
  <Match>
    <!-- Array contents are not mutated -->
    <Class name="org.apache.jasper.el.JasperELResolver"/>
    <Field name="resolvers" />
    <Bug pattern="VO_VOLATILE_REFERENCE_TO_ARRAY" />
  </Match>
  <Match>
    <!-- base null is handled by this resolver -->
    <Class name="org.apache.jasper.el.JasperELResolver"/>
    <Method name="getValue" />
    <Bug code="NP" />
  </Match>
  <Match>
    <!-- the platform default encoding is a fallback -->
    <Class name="org.apache.jasper.runtime.JspRuntimeLibrary"/>
    <Method name="URLEncode"/>
    <Bug code="Dm" />
  </Match>
  <Match>
    <!-- Use of == is deliberate, String.intern() is used -->
    <Class name="org.apache.jasper.xmlparser.XMLEncodingDetector"/>
    <Method name="scanXMLDeclOrTextDecl"/>
    <Bug code="ES"/>
  </Match>
  <Match>
    <!--  Cast is safe -->
    <Class name="org.apache.juli.AsyncFileHandler$DropLastPolicy"/>
    <Method name="rejectedExecution"/>
    <Bug pattern="BC_UNCONFIRMED_CAST"/>
  </Match>
  <Match>
    <!--  Dummy thread -->
    <Class name="org.apache.juli.AsyncFileHandler$LoggerExecutorService"/>
    <Method name="deregisterHandler"/>
    <Bug pattern="DM_USELESS_THREAD"/>
  </Match>
  <Match>
    <!-- Stream is closed in o.a.juli.ClassLoaderLogManager.readConfiguration
         (InputStream, ClassLoader) -->
    <Class name="org.apache.juli.ClassLoaderLogManager"/>
    <Method name="readConfiguration"/>
    <Bug code="OBL"/>
  </Match>
  <Match>
    <!-- There is no null-check -->
    <Class name="org.apache.juli.FileHandler"/>
    <Method name="lambda$clean$0" />
    <Bug pattern="RCN_REDUNDANT_NULLCHECK_WOULD_HAVE_BEEN_A_NPE" />
  </Match>
  <Match>
    <!-- If encoding is specified it will be used,
    otherwise platform default encoding will be used -->
    <Class name="org.apache.juli.FileHandler"/>
    <Method name="openWriter"/>
    <Bug code="Dm" />
  </Match>
  <Match>
    <!-- As per the comment, FileSystems.getDefault() does have a
         side-effect. -->
    <Class name="org.apache.juli.logging.LogFactory"/>
    <Method name="&lt;init&gt;"/>
    <Bug pattern="RV_RETURN_VALUE_IGNORED_NO_SIDE_EFFECT" />
  </Match>
  <Match>
    <!-- Reference.equals() implementation correctly handles sub-classes -->
    <Class name="org.apache.naming.ServiceRef" />
    <Pattern code="EQ_DOESNT_OVERRIDE_EQUALS" />
  </Match>
  <Match>
    <!-- Simpler to catch Exception than to create dummy implementations of the
         necessary exception hierarchy -->
    <Class name="org.apache.naming.factory.SendMailFactory" />
    <Or>
      <!-- Latest Eclipse plug-in and latest stand-alone JAR report different
           method names. -->
      <Method name="lambda$0" />
      <Method name="lambda$getObjectInstance$0" />
    </Or>
    <Bug pattern="DE_MIGHT_IGNORE" />
  </Match>
  <Match>
    <!-- Simpler to catch Exception than to create dummy implementations of the
         necessary exception hierarchy -->
    <Class name="org.apache.naming.factory.webservices.ServiceProxy" />
    <Method name="&lt;init&gt;"/>
    <Bug code="ST" />
  </Match>
  <Match>
    <!-- Class name needs to start with a lower case letter in this case -->
    <Class name="org.apache.naming.java.javaURLContextFactory" />
    <Bug code="Nm" />
  </Match>
  <Match>
    <!-- Class lock is not an instance lock -->
    <Class name="org.apache.naming.java.javaURLContextFactory" />
    <Field name="initialContext"/>
    <Bug pattern="SSD_DO_NOT_USE_INSTANCE_LOCK_ON_SHARED_STATIC_DATA"/>
  </Match>
  <Match>
    <!-- Utility classes used to import/export l10n strings -->
    <!-- This code does not need to be robust -->
    <Or>
      <Class name="org.apache.tomcat.buildutil.translate.Export"/>
      <Class name="org.apache.tomcat.buildutil.translate.Import"/>
    </Or>
  </Match>
  <Match>
    <!-- Sync protects writing not reading -->
    <Class name="org.apache.tomcat.dbcp.dbcp2.BasicDataSource" />
    <Field name="closed" />
    <Bug pattern="IS2_INCONSISTENT_SYNC" />
  </Match>
  <Match>
    <!-- Return value is never used -->
    <Class name="org.apache.tomcat.dbcp.dbcp2.DelegatingConnection" />
    <Method name="prepareStatement" />
    <Bug pattern="NP_NONNULL_RETURN_VIOLATION" />
  </Match>
  <Match>
    <!-- SQL is from config so is considered safe -->
    <Class name="org.apache.tomcat.dbcp.dbcp2.PoolableConnectionFactory" />
    <Method name="initializeConnection" />
    <Bug pattern="SQL_NONCONSTANT_STRING_PASSED_TO_EXECUTE" />
  </Match>
  <Match>
    <!-- SQL construction is safe for validation query -->
    <Class name="org.apache.tomcat.dbcp.dbcp2.PoolableConnectionFactory" />
    <Method name="validateConnection" />
    <Bug pattern="SQL_PREPARED_STATEMENT_GENERATED_FROM_NONCONSTANT_STRING" />
  </Match>
  <Match>
    <!-- SQL construction is necessary for pooled statements -->
    <Or>
      <Class name="org.apache.tomcat.dbcp.dbcp2.PStmtKey$PreparedStatementSQL" />
      <Class name="org.apache.tomcat.dbcp.dbcp2.PStmtKey$PreparedStatementWithAutoGeneratedKeys" />
      <Class name="org.apache.tomcat.dbcp.dbcp2.PStmtKey$PreparedStatementWithColumnIndexes" />
      <Class name="org.apache.tomcat.dbcp.dbcp2.PStmtKey$PreparedStatementWithColumnNames" />
      <Class name="org.apache.tomcat.dbcp.dbcp2.PStmtKey$PreparedStatementWithResultSetConcurrency" />
      <Class name="org.apache.tomcat.dbcp.dbcp2.PStmtKey$PreparedStatementWithResultSetHoldability" />
    </Or>
    <Method name="createStatement" />
    <Bug pattern="SQL_PREPARED_STATEMENT_GENERATED_FROM_NONCONSTANT_STRING" />
  </Match>
  <Match>
    <!-- SQL construction is necessary for pooled statements -->
    <Class name="org.apache.tomcat.dbcp.dbcp2.cpdsadapter.PooledConnectionImpl" />
    <Method name="makeObject" />
    <Bug pattern="SQL_PREPARED_STATEMENT_GENERATED_FROM_NONCONSTANT_STRING" />
  </Match>
  <Match>
    <!-- SQL construction is safe for validation query -->
    <Or>
      <Class name="org.apache.tomcat.dbcp.dbcp2.datasources.CPDSConnectionFactory" />
      <Class name="org.apache.tomcat.dbcp.dbcp2.datasources.KeyedCPDSConnectionFactory" />
    </Or>
    <Method name="validateObject" />
    <Bug pattern="SQL_NONCONSTANT_STRING_PASSED_TO_EXECUTE" />
  </Match>
  <Match>
    <!-- Commons DBCP 2 code Tomcat does not control -->
    <Class name="org.apache.tomcat.dbcp.dbcp2.datasources.UserPassKey" />
    <Or>
      <Field name="name" />
      <Field name="password" />
    </Or>
    <Bug pattern="SE_BAD_FIELD" />
  </Match>
  <Match>
    <!-- Pooled objects can't be null so this is OK -->
    <Class name="org.apache.tomcat.dbcp.pool2.impl.BaseGenericObjectPool$IdentityWrapper" />
    <Method name="equals" />
    <Bug pattern="NP_EQUALS_SHOULD_HANDLE_NULL_ARGUMENT" />
  </Match>
  <Match>
    <!-- Natural ordering behaviour is documented in Javadoc -->
    <Class name="org.apache.tomcat.dbcp.pool2.impl.DefaultPooledObject" />
    <Bug pattern="EQ_COMPARETO_USE_OBJECT_EQUALS" />
  </Match>
  <Match>
    <!-- Increment is in sync block so it is safe. Volatile is used so reading
         thread sees latest value.  -->
    <Class name="org.apache.tomcat.dbcp.pool2.impl.DefaultPooledObject" />
    <Method name="allocate" />
    <Bug pattern="VO_VOLATILE_INCREMENT" />
  </Match>
  <Match>
    <!-- Class lock is not an instance lock -->
    <Class name="org.apache.tomcat.dbcp.pool2.impl.EvictionTimer$Reaper" />
    <Or>
      <Field name="executor"/>
      <Field name="taskMap"/>
    </Or>
    <Bug pattern="SSD_DO_NOT_USE_INSTANCE_LOCK_ON_SHARED_STATIC_DATA"/>
  </Match>
  <Match>
    <!-- Fields do not need to be sync'd for toString() -->
    <Class name="org.apache.tomcat.dbcp.pool2.impl.SoftReferenceObjectPool" />
    <Or>
      <Field name="createCount"/>
      <Field name="numActive"/>
    </Or>
    <Bug pattern="IS2_INCONSISTENT_SYNC" />
  </Match>
  <Match>
    <!-- Public API is a design decision of Commons -->
    <Class name="org.apache.tomcat.dbcp.pool2.impl.SoftReferenceObjectPool" />
    <Bug pattern="PS_PUBLIC_SEMAPHORES" />
  </Match>
  <Match>
    <!-- Return value is ignored but a null result will trigger an exception -->
    <Class name="org.apache.tomcat.jdbc.pool.ConnectionPool$ConnectionFuture" />
    <Method name="get" />
    <Bug code="RV" />
  </Match>
  <Match>
    <!-- Name shadowing is deliberate -->
    <Or>
      <Class name="org.apache.tomcat.jdbc.pool.DataSource" />
      <Class name="org.apache.tomcat.jdbc.pool.XADataSource" />
    </Or>
    <Bug pattern="NM_SAME_SIMPLE_NAME_AS_INTERFACE" />
  </Match>
  <Match>
    <!-- NPE is triggered by concurrent close. Catching NPE is reasonable. -->
    <Class name="org.apache.tomcat.jdbc.pool.DisposableConnectionFacade" />
    <Method name="invoke" />
    <Bug pattern="DCN_NULLPOINTER_EXCEPTION" />
  </Match>
  <Match>
    <!-- Lock is released -->
    <Class name="org.apache.tomcat.jdbc.pool.FairBlockingQueue" />
    <Method name="poll" />
    <Bug code="UL" />
  </Match>
  <Match>
    <!-- Use of == is deliberate -->
    <Class name="org.apache.tomcat.jdbc.pool.JdbcInterceptor" />
    <Method name="compare" />
    <Bug code="ES" />
  </Match>
  <Match>
    <!-- Lock is released -->
    <Class name="org.apache.tomcat.jdbc.pool.MultiLockFairBlockingQueue" />
    <Method name="poll" />
    <Bug code="UL" />
  </Match>
  <Match>
    <!-- SQL is from config so is considered safe -->
    <Class name="org.apache.tomcat.jdbc.pool.PooledConnection" />
    <Method name="validate" />
    <Bug pattern="SQL_NONCONSTANT_STRING_PASSED_TO_EXECUTE" />
  </Match>
  <Match>
    <!-- Array elements are not mutated -->
    <Class name="org.apache.tomcat.jdbc.pool.PoolProperties" />
    <Field name="interceptors" />
    <Bug pattern="VO_VOLATILE_REFERENCE_TO_ARRAY" />
  </Match>
  <Match>
    <!-- The name isn't great but it is part of the public API now -->
    <Class name="org.apache.tomcat.jdbc.pool.TrapException" />
    <Bug pattern="NM_CLASS_NOT_EXCEPTION" />
  </Match>
  <Match>
    <!-- Lack of thread-safety is accepted in return for better performance. -->
    <Class name="org.apache.tomcat.jdbc.pool.interceptor.SlowQueryReport$QueryStats" />
    <Or>
      <Method name="add" />
      <Method name="failure" />
      <Method name="prepare" />
    </Or>
    <Bug code="VO" />
  </Match>
  <Match>
    <!-- Fields are used by native code. Tomcat doesn't use them but they are
         part of the public API. -->
    <Or>
      <Class name="org.apache.tomcat.jni.FileInfo" />
      <Class name="org.apache.tomcat.jni.Sockaddr" />
    </Or>
    <Bug pattern="UUF_UNUSED_PUBLIC_OR_PROTECTED_FIELD" />
  </Match>
  <Match>
    <!-- Field is populated by JNI code -->
    <Class name="org.apache.tomcat.jni.Sockaddr" />
    <Bug pattern="UWF_UNWRITTEN_PUBLIC_OR_PROTECTED_FIELD"/>
  </Match>
  <Match>
    <Class name="org.apache.tomcat.util.IntrospectionUtils" />
    <Method name="findMethod"/>
    <Bug code="NP" />
  </Match>
  <Match>
    <!-- Class name is appropriate -->
    <Class name="org.apache.tomcat.util.bcel.classfile.CodeException"/>
    <Bug code="Nm" />
  </Match>
  <Match>
    <!-- Field by field copy is fine for clone in this case -->
    <Class name="org.apache.tomcat.util.bcel.classfile.StackMapType"/>
    <Bug code="CN" />
  </Match>
  <Match>
    <!-- Fall-through expected -->
    <Class name="org.apache.tomcat.util.bcel.classfile.Utility"/>
    <Bug code="SF" />
  </Match>
  <Match>
    <!-- Handled by abstract base class -->
    <Or>
      <Class name="org.apache.tomcat.util.buf.ByteChunk"/>
      <Class name="org.apache.tomcat.util.buf.CharChunk"/>
    </Or>
    <Bug pattern="HE_EQUALS_NO_HASHCODE" />
  </Match>
  <Match>
    <!-- Returning null here is fine -->
    <Or>
      <Class name="org.apache.tomcat.util.buf.ByteChunk"/>
      <Class name="org.apache.tomcat.util.buf.CharChunk"/>
    </Or>
    <Method name="toString"/>
    <Bug code="NP" />
  </Match>
  <Match>
    <!-- Returning null here is fine -->
    <Class name="org.apache.tomcat.util.buf.MessageBytes"/>
    <Method name="toString"/>
    <Bug code="NP" />
  </Match>
  <Match>
    <!-- Whilst cache is global there may be multiple instances (one per     -->
    <!-- server so statics are appropriate -->
    <Class name="org.apache.tomcat.util.buf.StringCache"/>
    <Bug code="ST" />
  </Match>
  <Match>
    <!-- Array is only ever updated as a whole, not element by element -->
    <Class name="org.apache.tomcat.util.buf.StringCache"/>
    <Or>
      <Field name="bcCache"/>
      <Field name="ccCache"/>
    </Or>
    <Bug pattern="VO_VOLATILE_REFERENCE_TO_ARRAY"/>
  </Match>
  <Match>
    <!-- mb.toString() can be null because
    o.a.t.util.buf.MessageBytes.toString() can return NULL -->
    <Class name="org.apache.tomcat.util.buf.UDecoder"/>
    <Method name="convert"/>
    <Bug code="RCN" />
  </Match>
  <Match>
    <!-- the platform default encoding is a fallback -->
    <Class name="org.apache.tomcat.util.buf.UDecoder"/>
    <Method name="URLDecode"/>
    <Bug code="Dm" />
  </Match>
  <Match>
    <!-- Not an issue. Initialisation is as intended. -->
    <Class name="org.apache.tomcat.util.compat.JreCompat"/>
    <Method name="&lt;clinit&gt;"/>
    <Bug pattern="IC_SUPERCLASS_USES_SUBCLASS_DURING_INITIALIZATION" />
  </Match>
  <Match>
    <!-- URLs used are always provided by the container so would normally be -->
    <!-- file URLs.                                                          -->
    <Class name="org.apache.tomcat.util.descriptor.tld.TldResourcePath" />
    <Or>
      <Method name="equals" />
      <Method name="hashCode" />
    </Or>
    <Bug pattern="DMI_BLOCKING_METHODS_ON_URL" />
  </Match>
  <Match>
    <!-- NPE is desired as it indicates an error condition -->
    <Class name="org.apache.tomcat.util.digester.CallMethodRule"/>
    <Method name="end"/>
    <Bug code="NP" />
  </Match>
  <Match>
    <!-- Test really is for the same object rather than equality -->
    <Class name="org.apache.tomcat.util.digester.Digester"/>
    <Or>
      <Method name="updateBodyText"/>
      <Method name="updateAttributes"/>
    </Or>
    <Bug code="ES" />
  </Match>
  <Match>
    <!-- Write to static field is intentional -->
    <Class name="org.apache.tomcat.util.digester.Digester"/>
    <Method name="&lt;init&gt;"/>
    <Bug pattern="ST_WRITE_TO_STATIC_FROM_INSTANCE_METHOD" />
  </Match>
  <Match>
    <!-- Fall-through expected -->
    <Class name="org.apache.tomcat.util.http.LegacyCookieProcessor" />
    <Method name="processCookieHeader"/>
    <Bug code="SF" />
  </Match>
  <Match>
    <!-- the platform default encoding is a fallback -->
    <Class name="org.apache.tomcat.util.http.fileupload.MultipartStream"/>
    <Method name="readHeaders"/>
    <Bug code="Dm" />
  </Match>
  <Match>
    <!-- Deletion failure should never happen -->
    <Class name="org.apache.tomcat.util.http.fileupload.disk.DiskFileItem"/>
    <Or>
      <Method name="delete"/>
      <Method name="finalize"/>
    </Or>
    <Bug pattern="RV_RETURN_VALUE_IGNORED_BAD_PRACTICE" />
  </Match>
  <Match>
    <!-- the platform default encoding is a fallback -->
    <Class name="org.apache.tomcat.util.http.fileupload.disk.DiskFileItem"/>
    <Method name="getString"/>
    <Bug code="Dm" />
  </Match>
  <Match>
    <!-- the platform default encoding is deliberate -->
    <Class name="org.apache.tomcat.util.http.fileupload.util.Streams"/>
    <Method name="asString"/>
    <Bug code="Dm" />
  </Match>
  <Match>
    <!-- Fall-through expected -->
    <Class name="org.apache.tomcat.util.http.parser.Cookie" />
    <Or>
      <Method name="logInvalidHeader"/>
      <Method name="logInvalidVersion"/>
    </Or>
    <Bug code="SF" />
  </Match>
  <Match>
    <!-- Returns null by design -->
    <Class name="org.apache.tomcat.util.http.parser.EntityTag" />
     <Method name="compareEntityTag"/>
    <Bug pattern="NP_BOOLEAN_RETURN_NULL" />
  </Match>
  <Match>
    <!-- Reader instance always accepts -ve skip values and there is -->
    <!-- always enough space to skip back the requested amount.      -->
    <Class name="org.apache.tomcat.util.http.parser.HttpParser" />
    <Or>
      <Method name="skipConstant" />
      <Method name="readToken" />
      <Method name="readQuotedToken" />
      <Method name="readLhex" />
    </Or>
    <Bug pattern="SR_NOT_CHECKED" />
  </Match>
  <Match>
    <!--  Generated code -->
    <Or>
      <Class name="org.apache.tomcat.util.json.JSONParser"/>
      <Class name="org.apache.tomcat.util.json.JSONParserTokenManager"/>
      <Class name="org.apache.tomcat.util.json.ParseException"/>
      <Class name="org.apache.tomcat.util.json.TokenMgrError"/>
    </Or>
  </Match>
  <Match>
    <!-- Hiding of field in superclass is deliberate -->
    <Class name="org.apache.tomcat.util.modeler.NotificationInfo"/>
    <Field name="info" />
    <Bug code="MF" />
  </Match>
  <Match>
    <!-- See wait() call in destroy() -->
    <Class name="org.apache.tomcat.util.net.AprEndpoint$Poller"/>
    <Method name="run"/>
    <Bug code="NN" />
  </Match>
  <Match>
    <!-- There is only a single wait in run() when the poller is idle -->
    <Class name="org.apache.tomcat.util.net.AprEndpoint$Poller"/>
    <Or>
      <Method name="add"/>
      <Method name="close"/>
      <Method name="stop"/>
    </Or>
    <Bug pattern="NO_NOTIFY_NOT_NOTIFYALL" />
  </Match>
  <Match>
    <Class name="org.apache.tomcat.util.net.AprEndpoint$Sendfile"/>
    <Method name="run"/>
    <Or>
      <!-- see wait() call in destroy() -->
      <Bug code="NN" />
      <!-- notify() is called from add() -->
      <Bug code="UW" />
    </Or>
  </Match>
  <Match>
    <!-- There is only a single wait in run() when the poller is idle -->
    <Class name="org.apache.tomcat.util.net.AprEndpoint$Sendfile"/>
    <Or>
      <Method name="add"/>
      <Method name="stop"/>
    </Or>
    <Bug pattern="NO_NOTIFY_NOT_NOTIFYALL" />
  </Match>
  <Match>
    <!-- Sync is there to protect referenced object not field -->
    <Class name="org.apache.tomcat.util.net.AprEndpoint$SocketEventProcessor"/>
    <Method name="run"/>
    <Bug code="ML" />
  </Match>
  <Match>
    <!-- Modifications to SocketLists are always protected by syncs -->
    <Class name="org.apache.tomcat.util.net.AprEndpoint$SocketList"/>
    <Or>
      <Method name="add"/>
      <Method name="remove"/>
    </Or>
    <Bug pattern="VO_VOLATILE_INCREMENT"/>
  </Match>
  <Match>
    <!-- Object is only ever set to null, sync therefore is still valid -->
    <Class name="org.apache.tomcat.util.net.AprEndpoint$SocketProcessor"/>
    <Method name="run"/>
    <Bug code="ML"/>
  </Match>
  <Match>
    <!-- Sync is there to protect referenced object not field -->
    <Class name="org.apache.tomcat.util.net.AprEndpoint$SocketWithOptionsProcessor"/>
    <Method name="run"/>
    <Bug code="ML" />
  </Match>
  <Match>
    <!-- Sync is on closed to ensure that actions taken because the socket  -->
    <!-- open remain valid until the action is completed.                   -->
    <Class name="org.apache.tomcat.util.net.AprEndpoint$AprSocketWrapper"/>
    <Field name="closed"/>
    <Bug pattern="JLM_JSR166_UTILCONCURRENT_MONITORENTER"/>
  </Match>
  <Match>
    <!-- Return value is ignored at this point but logic further up call     -->
    <!-- stack will ensure that a SocketTimeoutException is thrown           -->
    <Class name="org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper"/>
    <Method name="awaitLatch"/>
    <Bug code="RV"/>
  </Match>
  <Match>
    <!-- Object is only ever set to null, sync therefore is still valid -->
    <Or>
      <Class name="org.apache.tomcat.util.net.NioEndpoint$SocketProcessor"/>
      <Class name="org.apache.tomcat.util.net.Nio2Endpoint$SocketProcessor"/>
    </Or>
    <Method name="run"/>
    <Bug code="ML"/>
  </Match>
  <Match>
    <!-- Single condition so notify() is OK -->
    <Class name="org.apache.tomcat.util.net.NioEndpoint$Poller"/>
    <Method name="processKey"/>
    <Bug pattern="NO_NOTIFY_NOT_NOTIFYALL" />
  </Match>
  <Match>
    <!-- Single condition so no need for wait to be in loop -->
    <Class name="org.apache.tomcat.util.net.Nio2Endpoint$Nio2SocketWrapper"/>
    <Or>
      <Method name="read"/>
      <Method name="write"/>
    </Or>
    <Bug pattern="WA_NOT_IN_LOOP" />
  </Match>
  <Match>
    <!-- Single wait so no need for notifyAll() -->
    <Class name="org.apache.tomcat.util.net.Nio2Endpoint$Nio2SocketWrapper$VectoredIOCompletionHandler"/>
    <Or>
      <Method name="completed"/>
      <Method name="failed"/>
    </Or>
    <Bug pattern="NO_NOTIFY_NOT_NOTIFYALL " />
  </Match>
  <Match>
    <!-- NPE should never happen but it is caught as a precaution -->
    <Class name="org.apache.tomcat.util.net.Nio2Endpoint$SocketProcessor" />
    <Method name="doRun" />
    <Bug pattern="DCN_NULLPOINTER_EXCEPTION" />
  </Match>
  <Match>
    <Class name="org.apache.tomcat.util.net.SecureNioChannel"/>
    <Method name="rehandshake"/>
    <Bug code="DE" />
  </Match>
  <Match>
    <!-- Fall-through expected -->
    <Class name="org.apache.tomcat.util.net.SecureNioChannel" />
    <Method name="processSNI"/>
    <Bug code="SF" />
  </Match>
  <Match>
    <!-- Fall-through expected -->
    <Class name="org.apache.tomcat.util.net.SecureNio2Channel" />
    <Method name="processSNI"/>
    <Bug code="SF" />
  </Match>
  <Match>
  <!-- Single condition so fine -->
    <Class name="org.apache.tomcat.util.net.SocketWrapperBase" />
    <Method name="vectoredOperation"/>
    <Bug pattern="WA_NOT_IN_LOOP" />
  </Match>
  <Match>
  <!-- Single condition so notify is fine -->
    <Class name="org.apache.tomcat.util.net.SocketWrapperBase$VectoredIOCompletionHandler" />
    <Or>
      <Method name="completed"/>
      <Method name="failed"/>
    </Or>
    <Bug pattern="NO_NOTIFY_NOT_NOTIFYALL" />
  </Match>
  <Match>
    <!-- Stream will be closed -->
    <Class name="org.apache.tomcat.util.net.jsse.PEMFile" />
    <Method name="&lt;init&gt;" />
    <Pattern name="OS_OPEN_STREAM" />
  </Match>
  <Match>
    <!-- Array elements are not modified after assignment -->
    <Class name="org.apache.tomcat.util.net.openssl.OpenSSLEngine" />
    <Or>
      <Field name="peerCerts"/>
      <Field name="x509PeerCerts"/>
    </Or>
    <Bug pattern="VO_VOLATILE_REFERENCE_TO_ARRAY" />
  </Match>
  <Match>
    <!-- No performance issue as there is no DNS resolution -->
    <Class name="org.apache.tomcat.util.scan.StandardJarScanner" />
    <Bug pattern="DMI_COLLECTION_OF_URLS" />
  </Match>
  <Match>
    <!-- Yes the simple name is the same as the super class. Accept it. -->
    <Class name="org.apache.tomcat.util.threads.ThreadPoolExecutor" />
    <Bug code="Nm" />
  </Match>
  <Match>
    <!-- Field is updated inside a lock. -->
    <Class name="org.apache.tomcat.util.threads.ThreadPoolExecutor" />
    <Method name="runWorker" />
    <Bug pattern="VO_VOLATILE_INCREMENT " />
  </Match>
  <Match>
    <!-- Monitor is used for a single condition. No need for loop. -->
    <Class name="org.apache.tomcat.util.threads.InlineExecutorService" />
    <Method name="awaitTermination" />
    <Bug pattern="WA_NOT_IN_LOOP" />
  </Match>
  <Match>
    <!-- Random will be SecureRandom and will be used multiple times. -->
    <Class name="org.apache.tomcat.websocket.DigestAuthenticator"/>
    <Method name="getAuthorization"/>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <!-- A concurrently closed connection can trigger NPEs. It is not possible
         to test for this before use. -->
    <Class name="org.apache.tomcat.websocket.PerMessageDeflate" />
    <Or>
      <Method name="getMoreData" />
      <Method name="sendMessagePart" />
      <Method name="startNewMessage" />
    </Or>
    <Bug pattern="DCN_NULLPOINTER_EXCEPTION" />
  </Match>
  <Match>
    <!-- Random will be SecureRandom and will be used multiple times. -->
    <Class name="org.apache.tomcat.websocket.Util"/>
    <Method name="generateMask"/>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <!-- Object creation will trigger input processing. -->
    <Class name="org.apache.tomcat.websocket.WsWebSocketContainer" />
    <Method name="connectToServer" />
    <Bug code="DLS" />
  </Match>
  <Match>
    <!-- Exception is caught so any issue is handled -->
    <Class name="org.apache.tomcat.websocket.WsRemoteEndpointImplBase" />
    <Method name="sendObjectByCompletion" />
    <Bug pattern="REC_CATCH_EXCEPTION" />
  </Match>
  <Match>
    <!-- Exception is caught so any issue is handled -->
    <Class name="org.apache.tomcat.websocket.WsWebSocketContainer" />
    <Method name="createSSLEngine" />
    <Bug pattern="REC_CATCH_EXCEPTION" />
  </Match>
  <Match>
    <!-- Random will be used multiple times. -->
    <Class name="org.apache.tomcat.websocket.WsWebSocketContainer"/>
    <Method name="generateWsKeyValue"/>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <!-- Fall-through expected -->
    <Class name="org.apache.tomcat.websocket.server.WsHttpUpgradeHandler" />
    <Method name="upgradeDispatch"/>
    <Bug code="SF" />
  </Match>
  <Match>
    <!-- The array contents is never mutated. -->
    <Class name="org.apache.tomcat.websocket.server.WsRemoteEndpointImplServer" />
    <Field name="buffers" />
    <Bug pattern="VO_VOLATILE_REFERENCE_TO_ARRAY" />
  </Match>

  <!-- Example code -->
  <Match>
    <!-- SpotBugs assumes the container uses the values as is. Tomcat validates
         them and escapes them as necessary to ensure they are safe. -->
    <Class name="CookieExample" />
    <Method name="doGet" />
    <Bug code="HRS" />
  </Match>
  <Match>
    <!-- As an example, this usage is fine -->
    <Class name="async.Stockticker"/>
    <Method name="run"/>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <!-- The Random is re-used -->
    <Class name="jsp2.examples.simpletag.ShuffleSimpleTag"/>
    <Method name="doTag"/>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <!-- Not really unused as it registers itself during construction -->
    <Class name="nonblocking.ByteCounter" />
    <Method name="doPost" />
    <Bug pattern="DLS_DEAD_LOCAL_STORE" />
  </Match>
  <Match>
    <!-- Not really unused as it registers itself during construction -->
    <Class name="nonblocking.NumberWriter" />
    <Method name="doGet" />
    <Bug pattern="DLS_DEAD_LOCAL_STORE" />
  </Match>
  <Match>
    <!-- The Random is re-used -->
    <Class name="num.NumberGuessBean"/>
    <Method name="reset"/>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <!-- The Random is re-used -->
    <Class name="websocket.snake.SnakeAnnotation"/>
    <Or>
      <Method name="getRandomHexColor"/>
      <Method name="getRandomLocation"/>
    </Or>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>


  <!-- Generated code -->
  <Match>
    <Or>
      <Class name="org.apache.el.parser.AstFloatingPoint" />
      <Class name="org.apache.el.parser.AstFunction" />
      <Class name="org.apache.el.parser.AstInteger" />
      <Class name="org.apache.el.parser.AstNegative" />
      <Class name="org.apache.el.parser.AstValue" />
      <Class name="org.apache.el.parser.ELParser" />
      <Class name="org.apache.el.parser.ELParserConstants" />
      <Class name="org.apache.el.parser.ELParserTokenManager" />
      <Class name="org.apache.el.parser.ELParserTreeConstants" />
      <Class name="org.apache.el.parser.ParseException" />
      <Class name="org.apache.el.parser.SimpleCharStream" />
      <Class name="org.apache.el.parser.TokenMgrError" />
    </Or>
  </Match>
  <Match>
    <!-- fCurrentEntity may be null after endEntity() call -->
    <Class name="org.apache.jasper.xmlparser.XMLEncodingDetector" />
    <Method name="load" />
    <Bug code="RCN" />
  </Match>


  <!-- Test code -->
  <Match>
    <!-- Code is deliberately unused -->
    <Class name="javax.el.TestImportHandler" />
    <Method name="testImportPackage01_57574"/>
    <Bug pattern="UC_USELESS_OBJECT"/>
  </Match>
  <Match>
    <!-- Code is deliberately unused -->
    <Or>
      <Class name="javax.servlet.http.TestCookie" />
      <Class name="javax.servlet.http.TestCookieStrict" />
    </Or>
    <Bug pattern="DLS_DEAD_LOCAL_STORE"/>
  </Match>
  <Match>
    <!-- Name is consistent in context -->
     <Class name="javax.servlet.http.TestHttpServletResponseSendError$ErrorServletStaticException" />
    <Bug pattern="NM_CLASS_NOT_EXCEPTION"/>
  </Match>
  <Match>
    <!-- Code is intentionally unused -->
    <Class name="org.apache.catalina.authenticator.TestBasicAuthParser"/>
    <Or>
      <Method name="testAuthMethodBadMethod"/>
      <Method name="testBadBase64Char"/>
      <Method name="testBadBase64InlineEquals"/>
    </Or>
    <Bug pattern="DLS_DEAD_LOCAL_STORE"/>
  </Match>
  <Match>
    <!-- Deliberate hack for the purposes of the test -->
    <Class name="org.apache.catalina.connector.TestCoyoteAdapter$AsyncServlet"/>
    <Field name="t"/>
    <Bug pattern="MSF_MUTABLE_SERVLET_FIELD"/>
  </Match>
  <Match>
    <!-- Container handles close -->
    <Class name="org.apache.catalina.connector.TestOutputBuffer$WritingServlet"/>
    <Method name="doGet"/>
    <Bug pattern="OS_OPEN_STREAM"/>
  </Match>
  <Match>
    <!-- ByteChunk.toString() can return null -->
    <Class name="org.apache.catalina.connector.TestRequest"/>
    <Method name="doBug56501"/>
    <Bug pattern="RCN_REDUNDANT_NULLCHECK_OF_NONNULL_VALUE"/>
  </Match>
  <Match>
    <!-- Return value of latch is intentionally ignored -->
    <Class name="org.apache.catalina.connector.TestSendFile"/>
    <Method name="testBug60409"/>
    <Bug pattern="RV_RETURN_VALUE_IGNORED"/>
  </Match>
  <Match>
    <!-- Single use of Random is deliberate -->
    <Class name="org.apache.catalina.connector.TestSendFile$Bug60409Servlet"/>
    <Method name="doGet"/>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <Class name="org.apache.catalina.core.TestApplicationSessionCookieConfig$CustomContext" />
    <Method name="getState"/>
    <Bug code="UG" />
  </Match>
  <Match>
    <!-- Dead store is deliberate -->
    <Or>
      <Class name="org.apache.catalina.core.TestAsyncContextImpl$AsyncDispatchUrlWithSpacesServlet"/>
      <Class name="org.apache.catalina.core.TestAsyncContextImpl$ForwardDispatchUrlWithSpacesServlet"/>
    </Or>
    <Method name="doGet"/>
    <Bug pattern="DLS_DEAD_LOCAL_STORE"/>
  </Match>
  <Match>
    <!-- Deliberate hack for the purposes of the test -->
    <Class name="org.apache.catalina.core.TestAsyncContextImpl$Bug49528Servlet"/>
    <Method name="doGet"/>
    <Bug pattern="RV_RETURN_VALUE_IGNORED_NO_SIDE_EFFECT"/>
  </Match>
  <Match>
    <!-- Deliberate hack for the purposes of the test -->
    <Class name="org.apache.catalina.core.TestAsyncContextImpl$Bug49528Servlet$1"/>
    <Method name="run"/>
    <Bug pattern="DCN_NULLPOINTER_EXCEPTION"/>
  </Match>
  <Match>
    <!-- Deliberate hack for the purposes of the test -->
    <Or>
      <Class name="org.apache.catalina.core.TestAsyncContextImpl$Bug49528Servlet"/>
      <Class name="org.apache.catalina.core.TestAsyncContextImpl$Bug49567Servlet"/>
    </Or>
    <Field name="result"/>
    <Bug pattern="MSF_MUTABLE_SERVLET_FIELD"/>
  </Match>
  <Match>
    <!-- Deliberate hack for the purposes of the test -->
    <Class name="org.apache.catalina.core.TestAsyncContextImpl$Bug49567Servlet"/>
    <Method name="doGet"/>
    <Bug pattern="RV_RETURN_VALUE_IGNORED_NO_SIDE_EFFECT"/>
  </Match>
  <Match>
    <!-- Deliberate hack for the purposes of the test -->
    <Class name="org.apache.catalina.core.TestAsyncContextImpl$Bug49567Servlet$1$1"/>
    <Method name="run"/>
    <Bug pattern="DCN_NULLPOINTER_EXCEPTION"/>
  </Match>
  <Match>
    <!-- Deliberate hack for the purposes of the test -->
    <Class name="org.apache.catalina.core.TestAsyncContextImpl$Bug53843ServletA"/>
    <Field name="isAsyncWhenExpected"/>
    <Bug pattern="MSF_MUTABLE_SERVLET_FIELD"/>
  </Match>
  <Match>
    <!-- Deliberate hack for the purposes of the test -->
    <Class name="org.apache.catalina.core.TestAsyncContextImpl$AsyncIoEndServlet"/>
    <Field name="asyncIoEndWriteListener"/>
    <Bug pattern="MSF_MUTABLE_SERVLET_FIELD"/>
  </Match>
  <Match>
    <!-- Deliberate hack for the purposes of the test -->
    <Class name="org.apache.catalina.core.TestAsyncContextImpl$AsyncISEServlet"/>
    <Field name="asyncContext"/>
    <Bug pattern="MSF_MUTABLE_SERVLET_FIELD"/>
  </Match>
  <Match>
    <!-- Deliberate use of run() for the purposes of the test -->
    <Class name="org.apache.catalina.core.TestAsyncContextStateChanges$AsyncServlet"/>
    <Method name="doGet"/>
    <Bug pattern="RU_INVOKE_RUN"/>
  </Match>
  <Match>
    <!-- Hard-coded absolute path is intentional -->
    <Class name="org.apache.catalina.core.TestStandardContext"/>
    <Method name="testBug57556b"/>
    <Bug pattern="DMI_HARDCODED_ABSOLUTE_FILENAME"/>
  </Match>
  <Match>
    <!-- Deliberate hack for the purposes of the test -->
    <Class name="org.apache.catalina.core.TestStandardContext$Bug51376Servlet"/>
    <Field name="destroyOk"/>
    <Bug pattern="MSF_MUTABLE_SERVLET_FIELD"/>
  </Match>
  <Match>
    <!-- ByteChunk.toString() can return null -->
    <Class name="org.apache.catalina.core.TestStandardContextAliases"/>
    <Method name="testDirContextAliases"/>
    <Bug pattern="RCN_REDUNDANT_NULLCHECK_OF_NONNULL_VALUE"/>
  </Match>
  <Match>
    <!-- Deliberate hack for the purposes of the test -->
    <Class name="org.apache.catalina.filters.TestRemoteIpFilter$MockHttpServlet"/>
    <Field name="request"/>
    <Bug pattern="MSF_MUTABLE_SERVLET_FIELD"/>
  </Match>
  <Match>
    <!-- Return value of latch is intentionally ignored -->
    <Class name="org.apache.catalina.nonblocking.TestNonBlockingAPI"/>
    <Or>
      <Method name="testDelayedNBReadWrite"/>
      <Method name="testDelayedNBWrite"/>
    </Or>
    <Bug pattern="RV_RETURN_VALUE_IGNORED"/>
  </Match>
  <Match>
    <!-- Deliberate hack for the purposes of the test -->
    <Class name="org.apache.catalina.nonblocking.TestNonBlockingAPI$NBReadServlet"/>
    <Filed name="listener"/>
    <Bug pattern="MSF_MUTABLE_SERVLET_FIELD"/>
  </Match>
  <Match>
    <!-- Return value of read is intentionally ignored -->
    <Class name="org.apache.catalina.nonblocking.TestNonBlockingAPI$NBReadWithDispatchServlet$1"/>
    <Method name="onDataAvailable"/>
    <Bug pattern="RR_NOT_CHECKED"/>
  </Match>
  <Match>
    <!-- Not single use -->
    <Class name="org.apache.catalina.startup.FastNonSecureRandom"/>
    <Or>
      <Method name="nextBytes"/>
      <Method name="setSeed"/>
    </Or>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <!-- Deliberate hack for the purposes of the test -->
    <Class name="org.apache.catalina.startup.TesterServletWithAnnotations"/>
    <Or>
      <Field name="envEntry2"/>
      <Field name="envEntry3"/>
      <Field name="envEntry4"/>
      <Field name="envEntry6"/>
    </Or>
    <Bug pattern="MSF_MUTABLE_SERVLET_FIELD"/>
  </Match>
  <Match>
    <!-- Deliberate hack for the purposes of the test -->
    <Class name="org.apache.catalina.startup.TesterServletWithLifeCycleMethods"/>
    <Field name="result"/>
    <Bug pattern="MSF_MUTABLE_SERVLET_FIELD"/>
  </Match>
  <Match>
    <Or>
      <Class name="org.apache.catalina.startup.TestListener$SCL" />
      <Class name="org.apache.catalina.startup.TestListener$SCL3" />
    </Or>
    <Method name="contextInitialized" />
    <Bug code="ST" />
  </Match>
  <Match>
    <Class name="org.apache.catalina.startup.TestTomcatClassLoader$ClassLoaderReport"/>
    <Bug code="Se"/>
  </Match>
  <Match>
    <!-- Deliberate hack for the purposes of the test -->
    <Class name="org.apache.catalina.startup.TestTomcat$CustomContextConfig"/>
    <Field name="used"/>
    <Bug pattern="ST_WRITE_TO_STATIC_FROM_INSTANCE_METHOD"/>
  </Match>
  <Match>
    <!-- Test code - array is safe -->
    <Class name="org.apache.catalina.startup.TomcatBaseTest"/>
    <Field name="booleans"/>
    <Bug pattern="MS_MUTABLE_ARRAY"/>
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.demos.EchoRpcTest" />
    <Method name="run"/>
    <Bug code="REC" />
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.demos.EchoRpcTest$SystemExit" />
    <Bug code="Dm" />
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.demos.IntrospectionUtils" />
    <Method name="findMethod"/>
    <Bug code="NP" />
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.demos.LoadTest" />
    <Method name="memberAdded"/>
    <Bug code="NN" />
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.demos.LoadTest" />
    <Method name="run"/>
    <Or>
      <Bug code="REC" />
      <Bug code="UW" />
    </Or>
  </Match>
  <Match>
    <!-- Not single use -->
    <Class name="org.apache.catalina.tribes.demos.LoadTest$LoadMessage"/>
    <Method name="&lt;clinit&gt;"/>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.demos.LoadTest$SystemExit" />
    <Bug code="Dm" />
  </Match>
  <Match>
    <!-- Not single use -->
    <Class name="org.apache.catalina.tribes.demos.MapDemo$SimpleTableDemo" />
    <Mehtod name="random"/>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.demos.MapDemo$SystemExit" />
    <Bug code="Dm" />
  </Match>
  <Match>
    <!-- Not single use -->
    <Class name="org.apache.catalina.tribes.group.TestGroupChannelSenderConnections$TestMsg" />
    <Method name="&lt;init&gt;"/>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.test.channel.TestChannelOptionFlag" />
    <Method name="tearDown" />
    <Bug code="DE" />
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.test.channel.TestChannelStartStop" />
    <Method name="tearDown" />
    <Bug code="DE" />
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.test.channel.TestChannelStartStop" />
    <Method name="testDoublePartialStart" />
    <Bug code="DE" />
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.test.channel.TestChannelStartStop" />
    <Method name="testFalseOption" />
    <Bug code="DE" />
  </Match>
  <Match>
    <!-- Not single use -->
    <Class name="org.apache.catalina.tribes.test.channel.TestDataIntegrity$Data" />
    <Method name="createRandomData"/>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <!-- Not single use -->
    <Class name="org.apache.catalina.tribes.test.channel.TestMulticastPackages$Data" />
    <Method name="createRandomData"/>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.test.channel.TestRemoteProcessException" />
   <Bug code="Nm" />
  </Match>
  <Match>
    <!-- Not single use -->
    <Class name="org.apache.catalina.tribes.test.channel.TestRemoteProcessException" />
    <Method name="testDataSendSYNCACK"/>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <!-- Not single use -->
    <Class name="org.apache.catalina.tribes.test.channel.TestRemoteProcessException$Data" />
    <Method name="createRandomData"/>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <!-- Not single use -->
    <Class name="org.apache.catalina.tribes.test.channel.TestUdpPackages$Data" />
    <Method name="createRandomData"/>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.test.interceptors.TestNonBlockingCoordinator" />
    <Method name="testCoord1" />
    <Bug code="DE" />
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.test.membership.TestTcpFailureDetector" />
    <Method name="tearDown" />
    <Bug code="DE" />
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.test.transport.SocketReceive$1" />
    <Method name="run" />
    <Bug code="DE" />
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.test.transport.SocketTribesReceive$1" />
    <Method name="run" />
    <Bug code="DE" />
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.test.transport.SocketTribesReceive" />
    <Method name="main" />
    <Bug code="DE" />
  </Match>
  <Match>
    <Class name="org.apache.catalina.tribes.test.transport.SocketValidateReceive$1" />
    <Method name="run" />
    <Bug code="DE" />
  </Match>
  <Match>
    <Class name="org.apache.catalina.users.DataSourceUserDatabaseTests"/>
    <Or>
      <Method name="testBasicUserRoleDatabase"/>
      <Method name="testUserDatabase"/>
    </Or>
    <Or>
      <!-- There is no null check - SpotBugs bug? -->
      <Bug pattern="RCN_REDUNDANT_NULLCHECK_WOULD_HAVE_BEEN_A_NPE"/>
      <!-- Non-constant is just a split constant -->
      <Bug pattern="SQL_NONCONSTANT_STRING_PASSED_TO_EXECUTE"/>
    </Or>
  </Match>
  <Match>
    <!-- Concrete Map type not affected -->
    <Class name="org.apache.catalina.util.TestParameterMap" />
    <Method name="testEntrySetImmutabilityAfterLocked" />
    <Bug pattern="DMI_ENTRY_SETS_MAY_REUSE_ENTRY_OBJECTS" />
  </Match>
  <Match>
    <!-- Deliberate hack for the purposes of the test -->
    <Class name="org.apache.catalina.valves.TestStuckThreadDetectionValve$StickingServlet"/>
    <Field name="wasInterrupted"/>
    <Bug pattern="MSF_MUTABLE_SERVLET_FIELD"/>
  </Match>
  <Match>
    <!-- Code is deliberately unused -->
    <Or>
      <Class name="org.apache.catalina.webresources.AbstractTestFileResourceSet" />
      <Class name="org.apache.catalina.webresources.TestDirResourceSet" />
      <Class name="org.apache.catalina.webresources.TestJarResourceSet" />
      <Class name="org.apache.catalina.webresources.TestJarResourceSetInternal" />
    </Or>
    <Method name="testNoArgConstructor" />
    <Bug pattern="DLS_DEAD_LOCAL_STORE"/>
  </Match>
  <Match>
    <!-- Return value ignored as this is a performance test -->
    <Class name="org.apache.catalina.webresources.TestAbstractFileResourceSetPerformance" />
    <Method name="testFileNameFiltering" />
    <Bug pattern="RV_RETURN_VALUE_IGNORED_NO_SIDE_EFFECT"/>
  </Match>
  <Match>
    <!-- Return values are irrelevant as exceptions should be thrown -->
    <Class name="org.apache.catalina.webresources.TestJarContents"/>
    <Or>
      <Method name="testStringOutOfBoundExceptions"/>
      <Method name="testNullPointerExceptions"/>
    </Or>
    <Bug pattern="RV_RETURN_VALUE_IGNORED_NO_SIDE_EFFECT"/>
  </Match>
  <Match>
    <!-- Use of hard-coded path is deliberate -->
    <Class name="org.apache.catalina.webresources.TestStandardRoot" />
    <Method name="&lt;clinit&gt;" />
    <Bug pattern="DMI_HARDCODED_ABSOLUTE_FILENAME"/>
  </Match>
  <Match>
    <!-- Deliberate hack for the purposes of the test -->
    <Class name="org.apache.coyote.http11.filters.TestChunkedInputFilter$BodyReadServlet"/>
    <Or>
      <Field name="countRead"/>
      <Field name="exceptionDuringRead"/>
    </Or>
    <Bug pattern="MSF_MUTABLE_SERVLET_FIELD"/>
  </Match>
  <Match>
    <!-- Deliberate hack for the purposes of the test -->
    <Class name="org.apache.coyote.http11.filters.TestChunkedInputFilter$EchoHeaderServlet"/>
    <Field name="exceptionDuringRead"/>
    <Bug pattern="MSF_MUTABLE_SERVLET_FIELD"/>
  </Match>
  <Match>
    <!-- Deliberate hack for the purposes of the test -->
    <Class name="org.apache.coyote.http11.TestHttp11Processor"/>
    <Field name="bug55772IsSecondRequest"/>
    <Bug pattern="ST_WRITE_TO_STATIC_FROM_INSTANCE_METHOD"/>
  </Match>
  <Match>
    <!-- Test code - and echoing a header should be safe anyway -->
    <Class name="org.apache.coyote.http11.upgrade.TestUpgrade$UpgradeServlet"/>
    <Method name="doGet"/>
    <Bug pattern="HRS_REQUEST_PARAMETER_TO_HTTP_HEADER"/>
  </Match>
  <Match>
    <!-- Single use is OK for this test -->
    <Class name="org.apache.coyote.http2.Http2TestBase$LargeHeaderServlet" />
    <Method name="doGet"/>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <!-- Latch isn't essential so no need to check return -->
    <Class name="org.apache.coyote.http2.TestAsyncTimeout"/>
    <Method name="testTimeout"/>
    <Bug pattern="RV_RETURN_VALUE_IGNORED"/>
  </Match>
  <Match>
    <!-- Single use is OK for this test -->
    <Class name="org.apache.coyote.http2.TestHttp2Limits" />
    <Method name="doTestHeaderLimits"/>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <!-- Result is negated to compare result when order is reversed -->
    <Class name="org.apache.el.TestELEvaluation" />
    <Method name="compareBoth" />
    <Bug pattern="RV_NEGATING_RESULT_OF_COMPARETO" />
  </Match>
  <Match>
    <!-- Performance test so results ignored -->
    <Class name="org.apache.jasper.compiler.TesterValidator" />
    <Method name="doTestBug53867" />
    <Bug pattern="RV_RETURN_VALUE_IGNORED_NO_SIDE_EFFECT" />
  </Match>
  <Match>
    <!-- Test is single threaded. Syncs not required. -->
    <Class name="org.apache.jasper.util.FastRemovalDequeue" />
    <Or>
      <Field name="first" />
      <Field name="last" />
    </Or>
    <Bug pattern="IS2_INCONSISTENT_SYNC" />
  </Match>
  <Match>
    <!-- Not single use -->
    <Class name="org.apache.juli.TestClassLoaderLogManager$LoggerCreateThread" />
    <Method name="run"/>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE"/>
  </Match>
  <Match>
    <!-- Field set via injection-->
    <Class name="org.apache.naming.TesterInjectionServlet" />
    <Or>
      <Field name="property1" />
      <Field name="property3" />
    </Or>
    <Bug pattern="UWF_NULL_FIELD" />
  </Match>
  <Match>
    <!-- Deliberate hack for the purposes of the test -->
    <Class name="org.apache.naming.TesterInjectionServlet" />
    <Or>
      <Field name="property2"/>
      <Field name="property2a"/>
    </Or>
    <Bug pattern="MSF_MUTABLE_SERVLET_FIELD"/>
  </Match>
  <Match>
    <!-- Use of statics is unavoidable in all cases -->
    <!-- Better to use it consistently rather than only where necessary -->
    <Class name="org.apache.tomcat.jdbc.pool.interceptor.TestInterceptor" />
    <Bug code="ST" />
  </Match>
  <Match>
    <!-- The name random is reused -->
    <Class name="org.apache.tomcat.jdbc.test.CreateTestTable" />
    <Method name="getRandom"/>
    <Bug pattern="DMI_RANDOM_USED_ONLY_ONCE" />
  </Match>
  <Match>
    <!-- The name shadowing is deliberate -->
    <Or>
      <Class name="org.apache.tomcat.jdbc.test.driver.Connection" />
      <Class name="org.apache.tomcat.jdbc.test.driver.Driver" />
      <Class name="org.apache.tomcat.jdbc.test.driver.ResultSet" />
    </Or>
    <Bug pattern="NM_SAME_SIMPLE_NAME_AS_INTERFACE" />
  </Match>
  <Match>
    <!-- The call with the ignored return value is used to ensure the pool -->
    <!-- thinks the connection is being used.                              -->
    <Class name="org.apache.tomcat.jdbc.test.AbandonPercentageTest" />
    <Method name="testResetConnection" />
    <Bug pattern="RV_RETURN_VALUE_IGNORED" />
  </Match>
  <Match>
    <!-- A number of the tests include performance tests -->
    <Class name="org.apache.tomcat.jdbc.test.DefaultTestCase" />
    <Method name="tearDown" />
    <Bug pattern="DM_GC" />
  </Match>
  <Match>
    <!-- Test does not explicitly close statement deliberately -->
    <Class name="org.apache.tomcat.jdbc.test.StatementFinalizerTest" />
    <Method name="testStatementFinalization" />
    <Bug pattern="ODR_OPEN_DATABASE_RESOURCE"/>
  </Match>
  <Match>
    <!-- Choice of name is deliberate -->
    <Class name="org.apache.tomcat.jdbc.test.TestException" />
    <Bug pattern="NM_CLASS_NOT_EXCEPTION" />
  </Match>
  <Match>
    <!-- Testing auto-close so connections not explicitly closed -->
    <Class name="org.apache.tomcat.jdbc.test.TestGCClose" />
    <Or>
      <Method name="testGCStop" />
      <Method name="testClose" />
    </Or>
    <Bug pattern="ODR_OPEN_DATABASE_RESOURCE" />
   </Match>
  <Match>
    <!-- SQL is from config so is considered safe -->
    <Class name="org.apache.tomcat.jdbc.test.TestSlowQueryReport" />
    <Method name="testFastSql" />
    <Bug pattern="SQL_NONCONSTANT_STRING_PASSED_TO_EXECUTE" />
  </Match>
  <Match>
    <!-- Use of static is unavoidable -->
    <Class name="org.apache.tomcat.jdbc.test.TestStatementCache" />
    <Method name="tearDown" />
    <Bug code="ST" />
  </Match>
  <Match>
    <!-- SQL is from generated in test code so is considered safe -->
    <Class name="org.apache.tomcat.jdbc.test.TestStatementCache" />
    <Method name="testMaxCacheSize" />
    <Bug pattern="SQL_PREPARED_STATEMENT_GENERATED_FROM_NONCONSTANT_STRING" />
  </Match>
  <Match>
    <!-- Tests throw exceptions so connections are never created -->
    <Class name="org.apache.tomcat.jdbc.test.TestValidationQueryTimeout" />
    <Or>
      <Method name="testValidationQueryTimeoutOnConnection" />
      <Method name="testValidationInvalidOnConnection" />
      <Method name="testValidationQueryTimeoutOnBorrow" />
    </Or>
    <Bug pattern="ODR_OPEN_DATABASE_RESOURCE" />
  </Match>
  <Match>
    <!-- Statics used to work around API limitations -->
    <Class name="org.apache.tomcat.jdbc.test.TestValidationQueryTimeout" />
    <Field name="isTimeoutSet" />
    <Bug pattern="ST_WRITE_TO_STATIC_FROM_INSTANCE_METHOD" />
  </Match>
  <Match>
    <Class name="org.apache.tomcat.jdbc.test.TwoDataSources" />
    <Method name="testTwoDataSources" />
    <Or>
      <!-- The object creation should fail -->
      <Bug pattern="RV_RETURN_VALUE_IGNORED" />
      <!-- The connection should be close by the pool -->
      <Bug pattern="ODR_OPEN_DATABASE_RESOURCE" />
    </Or>
  </Match>
  <Match>
    <Class name="org.apache.tomcat.util.http.TestCookieParsing$EchoCookieHeader"/>
    <Method name="service"/>
    <Bug pattern="XSS_REQUEST_PARAMETER_TO_SERVLET_WRITER"/>
  </Match>
  <Match>
    <!-- No performance issue as there is no DNS resolution -->
    <Class name="org.apache.tomcat.util.bcel.TesterPerformance" />
    <Method name="testClassParserPerformance" />
    <Bug pattern="DMI_COLLECTION_OF_URLS" />
  </Match>
  <Match>
    <Class name="org.apache.tomcat.util.net.TestSsl" />
    <Or>
      <Method name="testRenegotiateFail" />
      <Method name="testRenegotiateWorks" />
    </Or>
    <Bug code="RR" />
  </Match>
  <Match>
    <!-- Path is designed to test edge cases and does not have to exist-->
    <Class name="org.apache.tomcat.util.buf.TesterUriUtilBase" />
    <Or>
      <Method name="testBuildJarUrl01"/>
      <Method name="testBuildJarUrl02"/>
      <Method name="testBuildJarUrl03"/>
      <Method name="performanceTestBuildJarUrl"/>
    </Or>
    <Bug pattern="DMI_HARDCODED_ABSOLUTE_FILENAME"/>
  </Match>
  <Match>
    <!-- Return value ignored as this is a performance test -->
    <Class name="org.apache.tomcat.util.http.parser.TesterParserPerformance" />
    <Or>
      <Method name="doLookupTest" />
      <Method name="doLookupTestCheck" />
    </Or>
    <Bug pattern="RV_RETURN_VALUE_IGNORED_NO_SIDE_EFFECT" />
  </Match>
  <Match>
    <!-- Object not used as this is a performance test -->
    <Class name="org.apache.tomcat.util.http.TesterParametersPerformance" />
    <Method name="doCreateString" />
    <Bug pattern="UC_USELESS_OBJECT" />
  </Match>
  <Match>
    <!-- Return value ignored because an exception is expected -->
    <Class name="org.apache.tomcat.util.net.TestTLSClientHelloExtractor" />
    <Method name="doTestInputMalformed" />
    <Bug pattern="RV_RETURN_VALUE_IGNORED_NO_SIDE_EFFECT" />
  </Match>
  <Match>
    <!-- Have to do this to get the set of scanned classes as we only
         provide the SCI class name not an SCI instance. -->
    <Class name="org.apache.tomcat.util.scan.FooSCI"/>
    <Mehtod name="onStartup"/>
    <Bug pattern="ST_WRITE_TO_STATIC_FROM_INSTANCE_METHOD"/>
  </Match>
  <Match>
    <Class name="org.apache.tomcat.util.threads.TestLimitLatch" />
    <Or>
      <Method name="waitForThreadToStop" />
      <Method name="testTenWait" />
    </Or>
    <Bug pattern="NN_NAKED_NOTIFY " />
  </Match>
  <Match>
    <Class name="org.apache.tomcat.util.threads.TestLimitLatch$TestThread" />
     <Method name="run" />
     <Or>
      <Bug pattern="WA_NOT_IN_LOOP" />
      <Bug pattern="UW_UNCOND_WAIT " />
    </Or>
  </Match>
  <Match>
    <!-- Array contents is not mutated -->
    <Class name="org.apache.tomcat.websocket.pojo.TestEncodingDecoding$MsgByte"/>
    <Field name="data"/>
    <Bug pattern="VO_VOLATILE_REFERENCE_TO_ARRAY"/>
  </Match>
  <Match>
    <!-- Return value of latch is intentionally ignored -->
    <Or>
      <Class name="org.apache.tomcat.websocket.TestWebSocketFrameClient"/>
      <Class name="org.apache.tomcat.websocket.TestWebSocketFrameClientSSL"/>
    </Or>
    <Method name="testConnectToServerEndpoint"/>
    <Bug pattern="RV_RETURN_VALUE_IGNORED"/>
  </Match>
  <Match>
    <!-- Statics are used deliberately as they are simpler -->
    <Class name="org.apache.tomcat.websocket.server.TestClose" />
    <Method name="setUp" />
    <Bug pattern="ST_WRITE_TO_STATIC_FROM_INSTANCE_METHOD"/>
  </Match>
  <Match>
    <!-- Statics are used deliberately as they are simpler -->
    <Class name="org.apache.tomcat.websocket.TestWsSubprotocols$SubProtocolsEndpoint" />
    <Field name="subprotocols" />
    <Bug pattern="ST_WRITE_TO_STATIC_FROM_INSTANCE_METHOD"/>
  </Match>
  <Match>
    <!-- Statics are used deliberately as they are simpler -->
    <Class name="org.apache.tomcat.websocket.TestWsWebSocketContainerTimeoutServer$ConstantTxEndpoint" />
    <Or>
      <Field name="exception" />
      <Field name="running" />
      <Field name="timeout" />
    </Or>
    <Bug pattern="ST_WRITE_TO_STATIC_FROM_INSTANCE_METHOD"/>
  </Match>
  <Match>
    <!-- Code is deliberately unused -->
    <Class name="org.apache.tomcat.websocket.server.TestUriTemplate" />
    <Or>
      <Method name="testBasicPrefix" />
      <Method name="testDuplicate01" />
      <Method name="testEgMailingList04" />
      <Method name="testEgMailingList05" />
      <Method name="testQuote2" />
      <Method name="testSpecIssue194a" />
      <Method name="testSpecIssue194b" />
      <Method name="testSpecIssue194c" />
    </Or>
    <Bug pattern="DLS_DEAD_LOCAL_STORE"/>
  </Match>
  <Match>
    <!-- Exception thrown so return value ignored -->
    <Class name="org.apache.tomcat.websocket.server.TestUriTemplate" />
    <Or>
      <Method name="testPrefixOneOfTwo" />
      <Method name="testPrefixTwoOfTwo" />
      <Method name="testQuote1" />
    </Or>
    <Bug pattern="RV_RETURN_VALUE_IGNORED_NO_SIDE_EFFECT"/>
  </Match>
  <Match>
      <!-- There is no null check - SpotBugs bug? -->
    <Class name="org.apache.tomcat.websocket.server.TestWsServerContainer" />
    <Method name="testBug58232" />
    <Bug pattern="RCN_REDUNDANT_NULLCHECK_WOULD_HAVE_BEEN_A_NPE"/>
  </Match>
</FindBugsFilter>
