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high number of HTTP Threads in waiting on monitor state
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created by <a href="https://community.jboss.org/people/pgualotto">Piergiovanni Gualotto</a> in <i>jBPM</i> - <a href="https://community.jboss.org/message/758422#758422">View the full discussion</a>
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<div class="jive-rendered-content"><p>In Thread Dump most of threads are in following state : java.lang.Thread.State: BLOCKED (on object monitor) </p><p>The stack trace is always on :</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>"http-10.208.176.104-8080-52" daemon prio=3 tid=0x00000001028d4000 nid=0xbd waiting for monitor entry [0xfffffffe516fa000]</p><p>   java.lang.Thread.State: BLOCKED (on object monitor)</p><p>        at java.lang.Class.forName0(Native Method)</p><p>        at java.lang.Class.forName(Class.java:247)</p><p>        at org.mvel2.optimizers.AbstractOptimizer.tryStaticAccess(AbstractOptimizer.java:76)</p><p>        at org.mvel2.compiler.PropertyVerifier.getBeanProperty(PropertyVerifier.java:263)</p><p>        at org.mvel2.compiler.PropertyVerifier.analyze(PropertyVerifier.java:117)</p><p>        at org.mvel2.compiler.ExpressionCompiler.verify(ExpressionCompiler.java:381)</p><p>        at org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:273)</p><p>        at org.mvel2.util.ParseTools.subCompileExpression(ParseTools.java:2126)</p><p>        at org.mvel2.optimizers.impl.refl.collection.ExprValueAccessor.<init>(ExprValueAccessor.java:40)</p><p>        at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer._getAccessor(ReflectiveAccessorOptimizer.java:1188)</p><p>        at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer._getAccessor(ReflectiveAccessorOptimizer.java:1132)</p><p>        at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeCollection(ReflectiveAccessorOptimizer.java:1203)</p><p>        at org.mvel2.ast.InlineCollectionNode.<init>(InlineCollectionNode.java:53)</p><p>        at org.mvel2.compiler.AbstractParser.nextToken(AbstractParser.java:1207)</p><p>        at org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:128)</p><p>        at org.mvel2.util.ParseTools.subCompileExpression(ParseTools.java:2137)</p><p>        at org.mvel2.ast.WithNode.compileWithExpressions(WithNode.java:225)</p><p>        at org.mvel2.optimizers.impl.refl.nodes.WithAccessor.<init>(WithAccessor.java:27)</p><p>        at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getWithProperty(ReflectiveAccessorOptimizer.java:454)</p><p>        at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:383)</p><p>        at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileConstructor(ReflectiveAccessorOptimizer.java:1298)</p><p>        at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeObjectCreation(ReflectiveAccessorOptimizer.java:1221)</p><p>        at org.mvel2.ast.NewObjectNode.getReducedValueAccelerated(NewObjectNode.java:214)</p><p>        at org.mvel2.compiler.ExecutableAccessor.getValue(ExecutableAccessor.java:42)</p><p>        at org.mvel2.optimizers.impl.refl.collection.ExprValueAccessor.getValue(ExprValueAccessor.java:63)</p><p>        at org.mvel2.optimizers.impl.refl.collection.ListCreator.getValue(ListCreator.java:37)</p><p>        at org.mvel2.optimizers.impl.refl.collection.MapCreator.getValue(MapCreator.java:39)</p><p>        at org.mvel2.ast.InlineCollectionNode.getReducedValueAccelerated(InlineCollectionNode.java:82)</p><p>        at org.mvel2.MVELRuntime.execute(MVELRuntime.java:85)</p><p>        at org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:123)</p><p>        at org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:116)</p><p>        at org.mvel2.MVEL.executeExpression(MVEL.java:969)</p><p>        at org.jbpm.task.service.TaskService.eval(TaskService.java:327)</p><p>        at org.jbpm.task.service.TaskService.initialize(TaskService.java:134)</p><p>        at org.jbpm.task.service.TaskService.initialize(TaskService.java:101)</p><p>        at org.jbpm.task.service.TaskService.<init>(TaskService.java:79)</p><p>         at it.mail.omp.bpm.core.KnowledgeConfigurator.createTaskService(KnowledgeConfigurator.java:74)</p><p>        at it.mail.omp.bpm.core.KnowledgeUtil.getSession(KnowledgeUtil.java:270)</p><p>        at it.mail.omp.bpm.core.KnowledgeUtil.getSession(KnowledgeUtil.java:233)</p><p>        at it.mail.omp.bpm.core.KnowledgeUtil.startProcess(KnowledgeUtil.java:160)</p><p>        at it.mail.omp.bpm.core.OMPBPM.startBpmProcess(OMPBPM.java:77)</p><p>        at it.mail.omp.bpm.process.impl.AccettazioneInviiBPM.startProcess(AccettazioneInviiBPM.java:25)</p><p>        at it.mail.omp.servlet.ws.impl.AccettazioneServiceSOAP.accettazioneInvii(AccettazioneServiceSOAP.java:51)</p><p>        at sun.reflect.GeneratedMethodAccessor343.invoke(Unknown Source)</p><p>        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)</p><p>        at java.lang.reflect.Method.invoke(Method.java:597)</p><p>        at org.jboss.wsf.container.jboss50.invocation.InvocationHandlerJSE.invoke(InvocationHandlerJSE.java:117)</p><p>        at org.jboss.ws.core.server.ServiceEndpointInvoker.invoke(ServiceEndpointInvoker.java:241)</p><p>        at org.jboss.wsf.stack.jbws.RequestHandlerImpl.processRequest(RequestHandlerImpl.java:470)</p><p>        at org.jboss.wsf.stack.jbws.RequestHandlerImpl.handleRequest(RequestHandlerImpl.java:294)</p><p>        at org.jboss.wsf.stack.jbws.RequestHandlerImpl.doPost(RequestHandlerImpl.java:203)</p><p>        at org.jboss.wsf.stack.jbws.RequestHandlerImpl.handleHttpRequest(RequestHandlerImpl.java:129)</p><p>        at org.jboss.wsf.common.servlet.AbstractEndpointServlet.service(AbstractEndpointServlet.java:85)</p><p>        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)</p><p>        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)</p><p>        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)</p><p>        at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)</p><p>        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)</p><p>        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)</p><p>        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)</p><p>        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)</p><p>        at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:183)</p><p>        at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:95)</p><p>        at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)</p><p>        at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)</p><p>        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)</p><p>        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)</p><p>        at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)</p><p>        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:566)</p><p>        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)</p><p>        at org.jboss.web.tomcat.service.request.ActiveRequestResponseCacheValve.internalProcess(ActiveRequestResponseCacheValve.java:74)</p><p>        at org.jboss.web.tomcat.service.request.ActiveRequestResponseCacheValve.invoke(ActiveRequestResponseCacheValve.java:47)</p><p>        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)</p><p>        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)</p><p>        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:599)</p><p>        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:451)</p><p>        at java.lang.Thread.run(Thread.java:662)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>my problem is MVEL2 ? In this state the response time is long ......</p></div>
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