Hello, We are running tomcat 6.0.36 (java build 1.6.0_31) on REHL5. It works most of time except recently we started running out of files. Here is the error I am getting:
Exception in thread "pool-1-thread-1" java.lang.IllegalMonitorStateException at java.util.concurrent.locks.ReentrantLock$Sync.tryRelease(ReentrantLock.java:127) at java.util.concurrent.locks.AbstractQueuedSynchronizer.release(AbstractQueuedSynchronizer.java:1239) at java.util.concurrent.locks.ReentrantLock.unlock(ReentrantLock.java:431) at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:406) at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:947) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907) at java.lang.Thread.run(Thread.java:662) Exception in thread "pool-1-thread-2" java.lang.IllegalMonitorStateException at java.util.concurrent.locks.ReentrantLock$Sync.tryRelease(ReentrantLock.java:127) at java.util.concurrent.locks.AbstractQueuedSynchronizer.release(AbstractQueuedSynchronizer.java:1239) at java.util.concurrent.locks.ReentrantLock.unlock(ReentrantLock.java:431) at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:406) at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:947) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907) at java.lang.Thread.run(Thread.java:662) Jun 22, 2013 8:18:55 PM org.apache.catalina.tribes.transport.nio.NioReceiver socketTimeouts WARNING: Channel key is registered, but has had no interest ops for the last 3000 ms. (cancelled:false):sun.nio.ch.SelectionKeyImpl@378186dc last access:2013-06-22 20:18:50.645 Jun 22, 2013 8:19:00 PM org.apache.catalina.tribes.transport.nio.NioReceiver socketTimeouts WARNING: Channel key is registered, but has had no interest ops for the last 3000 ms. (cancelled:false):sun.nio.ch.SelectionKeyImpl@6ec71370 last access:2013-06-22 20:18:55.649 Jun 22, 2013 8:19:00 PM org.apache.catalina.tribes.transport.nio.NioReceiver socketTimeouts WARNING: Channel key is registered, but has had no interest ops for the last 3000 ms. (cancelled:false):sun.nio.ch.SelectionKeyImpl@378186dc last access:2013-06-22 20:18:55.646 Jun 22, 2013 8:19:05 PM org.apache.catalina.tribes.transport.nio.NioReceiver socketTimeouts WARNING: Channel key is registered, but has had no interest ops for the last 3000 ms. (cancelled:false):sun.nio.ch.SelectionKeyImpl@6ec71370 last access:2013-06-22 20:19:00.648 Jun 22, 2013 8:19:05 PM org.apache.catalina.tribes.transport.nio.NioReceiver socketTimeouts WARNING: Channel key is registered, but has had no interest ops for the last 3000 ms. (cancelled:false):sun.nio.ch.SelectionKeyImpl@71312bbd last access:2013-06-22 20:19:00.649 SEVERE: Unable to process request in NioReceiver java.lang.ThreadDeath at java.lang.Thread.stop(Thread.java:758) at net.bull.javamelody.Action.stopThread(Action.java:388) at net.bull.javamelody.Action.killThread(Action.java:374) at net.bull.javamelody.Action.execute(Action.java:227) at net.bull.javamelody.MonitoringController.executeActionIfNeeded(MonitoringController.java:117) at net.bull.javamelody.MonitoringController.doActionIfNeededAndReport(MonitoringController.java:130) at net.bull.javamelody.MonitoringFilter.doMonitoring(MonitoringFilter.java:340) at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:170) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:615) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.ha.session.JvmRouteBinderValve.invoke(JvmRouteBinderValve.java:227) at org.apache.catalina.ha.tcp.ReplicationValve.invoke(ReplicationValve.java:347) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) at org.apache.coyote.ajp.AjpAprProcessor.process(AjpAprProcessor.java:448) at org.apache.coyote.ajp.AjpAprProtocol$AjpConnectionHandler.process(AjpAprProtocol.java:403) at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1703) at java.lang.Thread.run(Thread.java:662) Jun 22, 2013 8:19:55 PM org.apache.catalina.tribes.transport.nio.NioReceiver socketTimeouts SEVERE: Unexpected poller error java.lang.ThreadDeath at java.lang.Thread.stop(Thread.java:758) at net.bull.javamelody.Action.stopThread(Action.java:388) at net.bull.javamelody.Action.killThread(Action.java:374) at net.bull.javamelody.Action.execute(Action.java:227) at net.bull.javamelody.MonitoringController.executeActionIfNeeded(MonitoringController.java:117) at net.bull.javamelody.MonitoringController.doActionIfNeededAndReport(MonitoringController.java:130) at net.bull.javamelody.MonitoringFilter.doMonitoring(MonitoringFilter.java:340) at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:170) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:615) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.ha.session.JvmRouteBinderValve.invoke(JvmRouteBinderValve.java:227) at org.apache.catalina.ha.tcp.ReplicationValve.invoke(ReplicationValve.java:347) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) at org.apache.coyote.ajp.AjpAprProcessor.process(AjpAprProcessor.java:448) at org.apache.coyote.ajp.AjpAprProtocol$AjpConnectionHandler.process(AjpAprProtocol.java:403) at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1703) at java.lang.Thread.run(Thread.java:662) Jun 22, 2013 8:20:00 PM org.apache.catalina.tribes.transport.nio.NioReceiver socketTimeouts SEVERE: Unexpected poller error java.lang.ThreadDeath at java.lang.Thread.stop(Thread.java:758) at net.bull.javamelody.Action.stopThread(Action.java:388) at net.bull.javamelody.Action.killThread(Action.java:374) at net.bull.javamelody.Action.execute(Action.java:227) at net.bull.javamelody.MonitoringController.executeActionIfNeeded(MonitoringController.java:117) at net.bull.javamelody.MonitoringController.doActionIfNeededAndReport(MonitoringController.java:130) at net.bull.javamelody.MonitoringFilter.doMonitoring(MonitoringFilter.java:340) at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:170) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:615) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.ha.session.JvmRouteBinderValve.invoke(JvmRouteBinderValve.java:227) at org.apache.catalina.ha.tcp.ReplicationValve.invoke(ReplicationValve.java:347) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) at org.apache.coyote.ajp.AjpAprProcessor.process(AjpAprProcessor.java:448) at org.apache.coyote.ajp.AjpAprProtocol$AjpConnectionHandler.process(AjpAprProtocol.java:403) at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1703) at java.lang.Thread.run(Thread.java:662) Jun 22, 2013 8:20:00 PM org.apache.catalina.tribes.transport.nio.NioReceiver socketTimeouts Then I get a bunch of Exception in thread "org%002ejasig%002ecas%002eticket%002e%0054icket%0047ranting%0054icket.data" java.lang.IllegalMonitorStateException at java.util.concurrent.locks.ReentrantLock$Sync.tryRelease(ReentrantLock.java:127) at java.util.concurrent.locks.AbstractQueuedSynchronizer.release(AbstractQueuedSynchronizer.java:1239) at java.util.concurrent.locks.ReentrantLock.unlock(ReentrantLock.java:431) at java.util.concurrent.DelayQueue.take(DelayQueue.java:176) at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:609) at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:602) at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:947) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907) at java.lang.Thread.run(Thread.java:662) Eventually, the filesystem fills up and tomcat is dead. Any ideas of why we are getting the thread errors. Thanks in advance! tom -- ***************************** Tom Freestone (tefreest...@gmail.com) *****************************