Deadlock appears in push component ---------------------------------- Key: RF-12899 URL: https://issues.jboss.org/browse/RF-12899 Project: RichFaces Issue Type: Bug Security Level: Public(Everyone can see) Components: component-push/poll Affects Versions: 4.2.2.Final Reporter: Jiří Mikulášek Assignee: Lukáš Fryč Fix For: 5.0.0.Alpha2 Our application freezes occasionally. We used Jstack and have seen the deadlock below. It seems to be very simillar to RF-12013, but the stack is slightly different Found one Java-level deadlock: ============================= {code} "localhost-startStop-2": waiting to lock monitor 0x000000000782a368 (object 0x000000078da957e0, a org.richfaces.application.push.impl.SessionImpl), which is held by "http-nio-30085-exec-4" "http-nio-30085-exec-4": waiting to lock monitor 0x00000000085cbe00 (object 0x000000078e8ecf90, a org.atmosphere.cpr.AtmosphereResourceImpl), which is held by "Atmosphere-AsyncWrite-0" "Atmosphere-AsyncWrite-0": waiting to lock monitor 0x000000000782a368 (object 0x000000078da957e0, a org.richfaces.application.push.impl.SessionImpl), which is held by "http-nio-30085-exec-4" {code} Java stack information for the threads listed above: =================================================== {code} "localhost-startStop-2": at org.richfaces.application.push.impl.SessionImpl.disconnect(SessionImpl.java:117) - waiting to lock <0x000000078da957e0> (a org.richfaces.application.push.impl.SessionImpl) at org.richfaces.application.push.impl.RequestImpl.disconnect(RequestImpl.java:128) at org.richfaces.application.push.impl.RequestImpl.onResume(RequestImpl.java:136) at org.atmosphere.cpr.AtmosphereResourceImpl.onResume(AtmosphereResourceImpl.java:658) at org.atmosphere.cpr.AtmosphereResourceImpl.notifyListeners(AtmosphereResourceImpl.java:607) at org.atmosphere.cpr.AtmosphereResourceImpl.notifyListeners(AtmosphereResourceImpl.java:591) at org.atmosphere.cpr.AtmosphereResourceImpl.resume(AtmosphereResourceImpl.java:187) - locked <0x000000078e8b64a8> (a org.atmosphere.cpr.AtmosphereResourceImpl) at org.atmosphere.cpr.DefaultBroadcaster.resumeAll(DefaultBroadcaster.java:300) - locked <0x000000078e8d1ac8> (a java.util.concurrent.ConcurrentLinkedQueue) at org.atmosphere.cpr.DefaultBroadcasterFactory.destroy(DefaultBroadcasterFactory.java:274) - locked <0x000000078cb112d8> (a org.atmosphere.cpr.DefaultBroadcasterFactory) at org.atmosphere.cpr.AtmosphereServlet.destroy(AtmosphereServlet.java:867) at org.atmosphere.cpr.MeteorServlet.destroy(MeteorServlet.java:88) at org.apache.catalina.core.StandardWrapper.unload(StandardWrapper.java:1481) - locked <0x0000000784b6a168> (a org.apache.catalina.core.StandardWrapper) at org.apache.catalina.core.StandardWrapper.stopInternal(StandardWrapper.java:1842) - locked <0x0000000784b6a168> (a org.apache.catalina.core.StandardWrapper) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232) - locked <0x0000000784b6a168> (a org.apache.catalina.core.StandardWrapper) at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5471) - locked <0x000000078312e828> (a org.apache.catalina.core.StandardContext) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232) - locked <0x000000078312e828> (a org.apache.catalina.core.StandardContext) at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1575) at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1564) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) at java.lang.Thread.run(Thread.java:662) "http-nio-30085-exec-4": at org.atmosphere.cpr.AtmosphereResourceImpl.resume(AtmosphereResourceImpl.java:168) - waiting to lock <0x000000078e8ecf90> (a org.atmosphere.cpr.AtmosphereResourceImpl) at org.atmosphere.cpr.Meteor.resume(Meteor.java:240) at org.richfaces.application.push.impl.RequestImpl.resume(RequestImpl.java:71) at org.richfaces.application.push.impl.SessionImpl.releaseRequest(SessionImpl.java:112) at org.richfaces.application.push.impl.SessionImpl.connect(SessionImpl.java:85) - locked <0x000000078da957e0> (a org.richfaces.application.push.impl.SessionImpl) at org.richfaces.application.push.impl.RequestImpl.onSuspend(RequestImpl.java:119) at org.atmosphere.cpr.AtmosphereResourceImpl.onSuspend(AtmosphereResourceImpl.java:652) at org.atmosphere.cpr.AtmosphereResourceImpl.notifyListeners(AtmosphereResourceImpl.java:611) at org.atmosphere.cpr.AtmosphereResourceImpl.notifyListeners(AtmosphereResourceImpl.java:591) at org.atmosphere.cpr.AtmosphereResourceImpl.suspend(AtmosphereResourceImpl.java:347) at org.atmosphere.cpr.Meteor.suspend(Meteor.java:213) at org.richfaces.application.push.impl.RequestImpl.suspend(RequestImpl.java:67) at org.richfaces.webapp.PushHandlerFilter.doFilter(PushHandlerFilter.java:107) at org.atmosphere.util.AtmosphereFilterChain.doFilter(AtmosphereFilterChain.java:139) at org.atmosphere.util.AtmosphereFilterChain.invokeFilterChain(AtmosphereFilterChain.java:116) at org.atmosphere.handler.ReflectorServletProcessor$FilterChainServletWrapper.service(ReflectorServletProcessor.java:293) at org.atmosphere.handler.ReflectorServletProcessor.onRequest(ReflectorServletProcessor.java:151) at org.atmosphere.cpr.AsynchronousProcessor.action(AsynchronousProcessor.java:219) at org.atmosphere.cpr.AsynchronousProcessor.suspended(AsynchronousProcessor.java:154) at org.atmosphere.container.Tomcat7CometSupport.service(Tomcat7CometSupport.java:85) at org.atmosphere.cpr.AtmosphereServlet.doCometSupport(AtmosphereServlet.java:1218) at org.atmosphere.cpr.AtmosphereServlet.event(AtmosphereServlet.java:1286) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilterEvent(ApplicationFilterChain.java:484) at org.apache.catalina.core.ApplicationFilterChain.doFilterEvent(ApplicationFilterChain.java:377) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1686) - locked <0x000000078e7fcc28> (a org.apache.tomcat.util.net.NioChannel) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) at java.lang.Thread.run(Thread.java:662) "Atmosphere-AsyncWrite-0": at org.richfaces.application.push.impl.SessionImpl.disconnect(SessionImpl.java:117) - waiting to lock <0x000000078da957e0> (a org.richfaces.application.push.impl.SessionImpl) at org.richfaces.application.push.impl.RequestImpl.disconnect(RequestImpl.java:128) at org.richfaces.application.push.impl.RequestImpl.onDisconnect(RequestImpl.java:140) at org.atmosphere.cpr.AtmosphereResourceImpl.onDisconnect(AtmosphereResourceImpl.java:664) at org.atmosphere.cpr.AtmosphereResourceImpl.notifyListeners(AtmosphereResourceImpl.java:609) at org.atmosphere.cpr.AtmosphereResourceImpl.notifyListeners(AtmosphereResourceImpl.java:591) at org.atmosphere.cpr.DefaultBroadcaster.executeAsyncWrite(DefaultBroadcaster.java:719) at org.atmosphere.cpr.DefaultBroadcaster$3.run(DefaultBroadcaster.java:749) - locked <0x000000078e8ecf90> (a org.atmosphere.cpr.AtmosphereResourceImpl) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) at java.lang.Thread.run(Thread.java:662) {code} Found 1 deadlock.