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Glassfish 2.1 + Seam - - - Grizzly threads blocked

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2 replies [Last post]
shenoy16
Offline
Joined: 2012-05-09

Hi ,

I need some help understanding the below thread dump. Basically we see glassfish stop accepting connections after some time. Thread dump shows series of grizzly threads in blocked state , however there is no deadlock. I fail to differentiate if this is a application problem leading to this or if its something with the server itself. Really appreciate any help on this.

Deadlock Detection:

No deadlocks found.

Thread 25728: (state = IN_NATIVE)
- java.lang.UNIXProcess.forkAndExec(byte[], byte[], int, byte[], int, byte[], boolean, java.io.FileDescriptor, java.io.FileDescriptor, java.io.FileDescriptor) @bci=0 (Interpreted frame)
- java.lang.UNIXProcess.access$500(java.lang.UNIXProcess, byte[], byte[], int, byte[], int, byte[], boolean, java.io.FileDescriptor, java.io.FileDescriptor, java.io.FileDescriptor) @bci=18, line=20 (Interpreted frame)
- java.lang.UNIXProcess$1$1.run() @bci=93, line=109 (Interpreted frame)

Thread 25717: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.util.TimerThread.mainLoop() @bci=201, line=509 (Compiled frame)
- java.util.TimerThread.run() @bci=1, line=462 (Interpreted frame)

Thread 25006: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.Object.wait() @bci=2, line=485 (Compiled frame)
- java.util.TimerThread.mainLoop() @bci=28, line=483 (Compiled frame)
- java.util.TimerThread.run() @bci=1, line=462 (Interpreted frame)

Thread 10671: (state = BLOCKED)
- sun.misc.Unsafe.park(boolean, long) @bci=0 (Interpreted frame)
- java.util.concurrent.locks.LockSupport.parkNanos(java.lang.Object, long) @bci=20, line=198 (Compiled frame)
- java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(long) @bci=68, line=2025 (Compiled frame)
- org.eclipse.jetty.util.BlockingArrayQueue.poll(long, java.util.concurrent.TimeUnit) @bci=53, line=337 (Compiled frame)
- org.eclipse.jetty.util.thread.QueuedThreadPool.idleJobPoll() @bci=12, line=516 (Compiled frame)
- org.eclipse.jetty.util.thread.QueuedThreadPool.access$600(org.eclipse.jetty.util.thread.QueuedThreadPool) @bci=1, line=39 (Compiled frame)
- org.eclipse.jetty.util.thread.QueuedThreadPool$3.run() @bci=275, line=562 (Compiled frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 22756: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.Object.wait() @bci=2, line=485 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.LinkedListPipeline.getTask() @bci=23, line=294 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run() @bci=28, line=104 (Compiled frame)

Thread 22755: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.Object.wait() @bci=2, line=485 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.LinkedListPipeline.getTask() @bci=23, line=294 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run() @bci=28, line=104 (Compiled frame)

Thread 17991: (state = BLOCKED)
- java.lang.Thread.sleep(long) @bci=0 (Interpreted frame)
- com.mavenir.sps.util.DataPollingThread.run() @bci=135, line=95 (Compiled frame)

Thread 17022: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.Object.wait() @bci=2, line=485 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.LinkedListPipeline.getTask() @bci=23, line=294 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run() @bci=28, line=104 (Compiled frame)

Thread 15541: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.ref.ReferenceQueue.remove(long) @bci=44, line=118 (Compiled frame)
- java.lang.ref.ReferenceQueue.remove() @bci=2, line=134 (Compiled frame)
- sun.java2d.Disposer.run() @bci=3, line=127 (Interpreted frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 15517: (state = BLOCKED)
- java.lang.Thread.sleep(long) @bci=0 (Interpreted frame)
- com.mavenir.cps.cli.impl.CliActiveUserMaintenance.run() @bci=101, line=45 (Compiled frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 15360: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.ref.ReferenceQueue.remove(long) @bci=44, line=118 (Compiled frame)
- java.lang.ref.ReferenceQueue.remove() @bci=2, line=134 (Compiled frame)
- org.jboss.el.util.ReferenceCache$ReferenceQueueRunner.run() @bci=3, line=165 (Interpreted frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 7506: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- com.mavenir.cps.core.util.PushedAlarmManager$MessageProcessor.run() @bci=78, line=515 (Compiled frame)

Thread 6793: (state = IN_NATIVE)
- java.io.UnixFileSystem.getBooleanAttributes0(java.io.File) @bci=0 (Compiled frame; information may be imprecise)
Error occurred during stack walking:

Thread 6353: (state = BLOCKED)

Thread 6792: (state = IN_NATIVE)
- java.io.UnixFileSystem.getLastModifiedTime(java.io.File) @bci=0 (Compiled frame; information may be imprecise)
Error occurred during stack walking:

Thread 6772: (state = BLOCKED)
- java.lang.Thread.sleep(long) @bci=0 (Interpreted frame)
- org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run() @bci=22, line=1816 (Compiled frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6771: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.util.TimerThread.mainLoop() @bci=201, line=509 (Compiled frame)
- java.util.TimerThread.run() @bci=1, line=462 (Interpreted frame)

Thread 6770: (state = BLOCKED)
Error occurred during stack walking:

Thread 6769: (state = BLOCKED)
Error occurred during stack walking:

Thread 6768: (state = IN_NATIVE)
- java.net.SocketInputStream.socketRead0(java.io.FileDescriptor, byte[], int, int, int) @bci=0 (Compiled frame; information may be imprecise)
Error occurred during stack walking:

Thread 6767: (state = IN_NATIVE)
- java.net.PlainSocketImpl.socketAccept(java.net.SocketImpl) @bci=0 (Interpreted frame)
- java.net.PlainSocketImpl.accept(java.net.SocketImpl) @bci=7, line=390 (Interpreted frame)
- java.net.ServerSocket.implAccept(java.net.Socket) @bci=60, line=453 (Interpreted frame)
- java.net.ServerSocket.accept() @bci=48, line=421 (Interpreted frame)
- com.mavenir.cps.cli.fileserver.FileServer$1.run() @bci=55, line=56 (Interpreted frame)

Thread 6711: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- org.apache.derby.impl.services.daemon.BasicDaemon.rest() @bci=22 (Interpreted frame)
- org.apache.derby.impl.services.daemon.BasicDaemon.run() @bci=22 (Compiled frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6708: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.Object.wait() @bci=2, line=485 (Interpreted frame)
- java.util.TimerThread.mainLoop() @bci=28, line=483 (Interpreted frame)
- java.util.TimerThread.run() @bci=1, line=462 (Interpreted frame)

Thread 6706: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.Object.wait() @bci=2, line=485 (Interpreted frame)
- org.apache.derby.impl.services.monitor.AntiGC.run() @bci=15 (Interpreted frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6695: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.Object.wait() @bci=2, line=485 (Interpreted frame)
- com.mavenir.sps.interoperability.SocketRouterServer$Queue.removeItem() @bci=23, line=245 (Interpreted frame)
- com.mavenir.sps.interoperability.SocketRouterServer$1.run() @bci=17, line=139 (Interpreted frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6688: (state = IN_NATIVE)
- java.net.PlainDatagramSocketImpl.receive0(java.net.DatagramPacket) @bci=0 (Interpreted frame)
- java.net.PlainDatagramSocketImpl.receive(java.net.DatagramPacket) @bci=2, line=136 (Interpreted frame)
- java.net.DatagramSocket.receive(java.net.DatagramPacket) @bci=243, line=725 (Interpreted frame)
- com.mavenir.sps.interoperability.SocketRouterServer.run(java.lang.String[]) @bci=56, line=65 (Compiled frame)
- com.mavenir.sps.interoperability.SocketRouterServer.run() @bci=35, line=48 (Interpreted frame)

Thread 6681: (state = BLOCKED)
- sun.misc.Unsafe.park(boolean, long) @bci=0 (Interpreted frame)
- java.util.concurrent.locks.LockSupport.parkNanos(java.lang.Object, long) @bci=20, line=198 (Compiled frame)
- java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(long) @bci=68, line=2025 (Compiled frame)
- org.eclipse.jetty.util.BlockingArrayQueue.poll(long, java.util.concurrent.TimeUnit) @bci=53, line=337 (Compiled frame)
- org.eclipse.jetty.util.thread.QueuedThreadPool.idleJobPoll() @bci=12, line=516 (Compiled frame)
- org.eclipse.jetty.util.thread.QueuedThreadPool.access$600(org.eclipse.jetty.util.thread.QueuedThreadPool) @bci=1, line=39 (Compiled frame)
- org.eclipse.jetty.util.thread.QueuedThreadPool$3.run() @bci=275, line=562 (Compiled frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6679: (state = BLOCKED)
- sun.misc.Unsafe.park(boolean, long) @bci=0 (Interpreted frame)
- java.util.concurrent.locks.LockSupport.parkNanos(java.lang.Object, long) @bci=20, line=198 (Compiled frame)
- java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(long) @bci=68, line=2025 (Compiled frame)
- org.eclipse.jetty.util.BlockingArrayQueue.poll(long, java.util.concurrent.TimeUnit) @bci=53, line=337 (Compiled frame)
- org.eclipse.jetty.util.thread.QueuedThreadPool.idleJobPoll() @bci=12, line=516 (Compiled frame)
- org.eclipse.jetty.util.thread.QueuedThreadPool.access$600(org.eclipse.jetty.util.thread.QueuedThreadPool) @bci=1, line=39 (Compiled frame)
- org.eclipse.jetty.util.thread.QueuedThreadPool$3.run() @bci=275, line=562 (Compiled frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6678: (state = BLOCKED)
- sun.misc.Unsafe.park(boolean, long) @bci=0 (Interpreted frame)
- java.util.concurrent.locks.LockSupport.parkNanos(java.lang.Object, long) @bci=20, line=198 (Compiled frame)
- java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(long) @bci=68, line=2025 (Compiled frame)
- org.eclipse.jetty.util.BlockingArrayQueue.poll(long, java.util.concurrent.TimeUnit) @bci=53, line=337 (Compiled frame)
- org.eclipse.jetty.util.thread.QueuedThreadPool.idleJobPoll() @bci=12, line=516 (Compiled frame)
- org.eclipse.jetty.util.thread.QueuedThreadPool.access$600(org.eclipse.jetty.util.thread.QueuedThreadPool) @bci=1, line=39 (Compiled frame)
- org.eclipse.jetty.util.thread.QueuedThreadPool$3.run() @bci=275, line=562 (Compiled frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6677: (state = BLOCKED)
- sun.misc.Unsafe.park(boolean, long) @bci=0 (Interpreted frame)
- java.util.concurrent.locks.LockSupport.parkNanos(java.lang.Object, long) @bci=20, line=198 (Compiled frame)
- java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(long) @bci=68, line=2025 (Compiled frame)
- org.eclipse.jetty.util.BlockingArrayQueue.poll(long, java.util.concurrent.TimeUnit) @bci=53, line=337 (Compiled frame)
- org.eclipse.jetty.util.thread.QueuedThreadPool.idleJobPoll() @bci=12, line=516 (Compiled frame)
- org.eclipse.jetty.util.thread.QueuedThreadPool.access$600(org.eclipse.jetty.util.thread.QueuedThreadPool) @bci=1, line=39 (Compiled frame)
- org.eclipse.jetty.util.thread.QueuedThreadPool$3.run() @bci=275, line=562 (Compiled frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6676: (state = BLOCKED)
- java.lang.Thread.sleep(long) @bci=0 (Interpreted frame)
- org.eclipse.jetty.client.HttpClient$1.run() @bci=46, line=459 (Compiled frame)
- org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(java.lang.Runnable) @bci=1, line=598 (Interpreted frame)
- org.eclipse.jetty.util.thread.QueuedThreadPool$3.run() @bci=47, line=533 (Interpreted frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6675: (state = BLOCKED)
- sun.misc.Unsafe.park(boolean, long) @bci=0 (Interpreted frame)
- java.util.concurrent.locks.LockSupport.parkNanos(java.lang.Object, long) @bci=20, line=198 (Compiled frame)
- java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(long) @bci=68, line=2025 (Compiled frame)
- org.eclipse.jetty.util.BlockingArrayQueue.poll(long, java.util.concurrent.TimeUnit) @bci=53, line=337 (Compiled frame)
- org.eclipse.jetty.util.thread.QueuedThreadPool.idleJobPoll() @bci=12, line=516 (Compiled frame)
- org.eclipse.jetty.util.thread.QueuedThreadPool.access$600(org.eclipse.jetty.util.thread.QueuedThreadPool) @bci=1, line=39 (Compiled frame)
- org.eclipse.jetty.util.thread.QueuedThreadPool$3.run() @bci=275, line=562 (Compiled frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6674: (state = BLOCKED)
- java.util.concurrent.locks.AbstractQueuedSynchronizer.compareAndSetWaitStatus(java.util.concurrent.locks.AbstractQueuedSynchronizer$Node, int, int) @bci=0, line=2258 (Interpreted frame)
- java.util.concurrent.locks.AbstractQueuedSynchronizer.unparkSuccessor(java.util.concurrent.locks.AbstractQueuedSynchronizer$Node) @bci=12, line=624 (Interpreted frame)
- java.util.concurrent.locks.AbstractQueuedSynchronizer.release(int) @bci=26, line=1242 (Compiled frame)
- java.util.concurrent.locks.ReentrantLock.unlock() @bci=5, line=431 (Compiled frame)
- org.eclipse.jetty.util.BlockingArrayQueue.offer(java.lang.Object) @bci=202, line=226 (Interpreted frame)
- org.eclipse.jetty.util.thread.QueuedThreadPool.dispatch(java.lang.Runnable) @bci=27, line=354 (Interpreted frame)
- org.eclipse.jetty.client.SelectConnector$Manager.dispatch(java.lang.Runnable) @bci=11, line=127 (Interpreted frame)
- org.eclipse.jetty.io.nio.SelectorManager$SelectSet.doSelect() @bci=1220, line=696 (Compiled frame)
- org.eclipse.jetty.io.nio.SelectorManager$1.run() @bci=181, line=283 (Compiled frame)
- org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(java.lang.Runnable) @bci=1, line=598 (Interpreted frame)
- org.eclipse.jetty.util.thread.QueuedThreadPool$3.run() @bci=47, line=533 (Interpreted frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6659: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.Object.wait() @bci=2, line=485 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.LinkedListPipeline.getTask() @bci=23, line=294 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run() @bci=28, line=104 (Compiled frame)

Thread 6658: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.Object.wait() @bci=2, line=485 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.LinkedListPipeline.getTask() @bci=23, line=294 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run() @bci=28, line=104 (Compiled frame)

Thread 6657: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.util.TimerThread.mainLoop() @bci=201, line=509 (Compiled frame)
- java.util.TimerThread.run() @bci=1, line=462 (Interpreted frame)

Thread 6656: (state = IN_VM)
- org.quartz.simpl.SimpleThreadPool$WorkerThread.run(java.lang.Runnable) @bci=31, line=524 (Interpreted frame)
- org.quartz.simpl.SimpleThreadPool.runInThread(java.lang.Runnable) @bci=82, line=402 (Interpreted frame)
- org.quartz.core.QuartzSchedulerThread.run() @bci=677, line=381 (Compiled frame)

Thread 6655: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- org.quartz.simpl.SimpleThreadPool$WorkerThread.run() @bci=51, line=543 (Compiled frame)

Thread 6654: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.Object.wait() @bci=2, line=485 (Compiled frame)
- java.lang.UNIXProcess$Gate.waitForExit() @bci=10, line=64 (Compiled frame)
- java.lang.UNIXProcess.(byte[], byte[], int, byte[], int, byte[], boolean) @bci=74, line=145 (Interpreted frame)
- java.lang.ProcessImpl.start(java.lang.String[], java.util.Map, java.lang.String, boolean) @bci=182, line=65 (Interpreted frame)
- java.lang.ProcessBuilder.start() @bci=120, line=453 (Compiled frame)
- java.lang.Runtime.exec(java.lang.String[], java.lang.String[], java.io.File) @bci=16, line=593 (Compiled frame)
- java.lang.Runtime.exec(java.lang.String, java.lang.String[], java.io.File) @bci=69, line=431 (Compiled frame)
- java.lang.Runtime.exec(java.lang.String) @bci=4, line=328 (Compiled frame)
- com.mavenir.sps.util.SPSUtil.getActive(java.lang.String) @bci=28, line=647 (Compiled frame)
- com.mavenir.cps.core.quartz.CPSNodeSyncJob.execute(org.quartz.JobExecutionContext) @bci=2, line=49 (Compiled frame)
- org.quartz.core.JobRunShell.run() @bci=255, line=216 (Interpreted frame)
- org.quartz.simpl.SimpleThreadPool$WorkerThread.run() @bci=82, line=549 (Compiled frame)

Thread 6653: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- org.quartz.simpl.SimpleThreadPool$WorkerThread.run() @bci=51, line=543 (Compiled frame)

Thread 6652: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- org.quartz.simpl.SimpleThreadPool$WorkerThread.run() @bci=51, line=543 (Compiled frame)

Thread 6651: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- org.quartz.simpl.SimpleThreadPool$WorkerThread.run() @bci=51, line=543 (Compiled frame)

Thread 6650: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- org.quartz.simpl.SimpleThreadPool$WorkerThread.run() @bci=51, line=543 (Compiled frame)

Thread 6649: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- org.quartz.simpl.SimpleThreadPool$WorkerThread.run() @bci=51, line=543 (Compiled frame)

Thread 6648: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- org.quartz.simpl.SimpleThreadPool$WorkerThread.run() @bci=51, line=543 (Compiled frame)

Thread 6647: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- org.quartz.simpl.SimpleThreadPool$WorkerThread.run() @bci=51, line=543 (Compiled frame)

Thread 6646: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- org.quartz.simpl.SimpleThreadPool$WorkerThread.run() @bci=51, line=543 (Compiled frame)

Thread 6645: (state = IN_NATIVE)
- java.io.UnixFileSystem.getBooleanAttributes0(java.io.File) @bci=0 (Compiled frame; information may be imprecise)
Error occurred during stack walking:

Thread 6641: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.Object.wait() @bci=2, line=485 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.LinkedListPipeline.getTask() @bci=23, line=294 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run() @bci=28, line=104 (Compiled frame)

Thread 6638: (state = BLOCKED)
- java.lang.Thread.sleep(long) @bci=0 (Interpreted frame)
- org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run() @bci=22, line=1816 (Compiled frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6637: (state = BLOCKED)
- java.lang.Thread.sleep(long) @bci=0 (Interpreted frame)
- org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run() @bci=22, line=1816 (Compiled frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6636: (state = BLOCKED)
- java.lang.Thread.sleep(long) @bci=0 (Interpreted frame)
- org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run() @bci=22, line=1816 (Compiled frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6635: (state = BLOCKED)
- java.lang.Thread.sleep(long) @bci=0 (Interpreted frame)
- org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run() @bci=22, line=1816 (Compiled frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6634: (state = BLOCKED)
- java.lang.Thread.sleep(long) @bci=0 (Interpreted frame)
- org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run() @bci=22, line=1816 (Compiled frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6633: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.Object.wait() @bci=2, line=485 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.LinkedListPipeline.getTask() @bci=23, line=294 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.WorkerThreadImpl.run() @bci=28, line=114 (Interpreted frame)

Thread 6632: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.Object.wait() @bci=2, line=485 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.LinkedListPipeline.getTask() @bci=23, line=294 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.WorkerThreadImpl.run() @bci=28, line=114 (Interpreted frame)

Thread 6631: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.Object.wait() @bci=2, line=485 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.LinkedListPipeline.getTask() @bci=23, line=294 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run() @bci=28, line=104 (Compiled frame)

Thread 6630: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.Object.wait() @bci=2, line=485 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.LinkedListPipeline.getTask() @bci=23, line=294 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run() @bci=28, line=104 (Compiled frame)

Thread 6629: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.Object.wait() @bci=2, line=485 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.LinkedListPipeline.getTask() @bci=23, line=294 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run() @bci=28, line=104 (Compiled frame)

Thread 6628: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.Object.wait() @bci=2, line=485 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.LinkedListPipeline.getTask() @bci=23, line=294 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run() @bci=28, line=104 (Compiled frame)

Thread 6627: (state = BLOCKED)
- com.sun.enterprise.web.connector.grizzly.SelectorThread.enableSelectionKeys() @bci=0, line=646 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.SelectorThread.doSelect() @bci=6, line=1345 (Compiled frame)
- com.sun.enterprise.web.connector.grizzly.SelectorThread.startListener() @bci=25, line=1295 (Compiled frame)
- com.sun.enterprise.web.connector.grizzly.SelectorThread.startEndpoint() @bci=34, line=1258 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.SelectorThread.run() @bci=1, line=1234 (Interpreted frame)

Thread 6626: (state = IN_NATIVE)
- sun.nio.ch.ServerSocketChannelImpl.accept0(java.io.FileDescriptor, java.io.FileDescriptor, java.net.InetSocketAddress[]) @bci=0 (Interpreted frame)
- sun.nio.ch.ServerSocketChannelImpl.accept() @bci=94, line=145 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.SelectorThread.handleAccept(java.nio.channels.SelectionKey) @bci=9, line=1478 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.SelectorThread.handleConnection(java.nio.channels.SelectionKey) @bci=16, line=1457 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.SelectorThread.doSelect() @bci=84, line=1361 (Compiled frame)
- com.sun.enterprise.web.connector.grizzly.SelectorThread.startListener() @bci=25, line=1295 (Compiled frame)
- com.sun.enterprise.web.connector.grizzly.SelectorThread.startEndpoint() @bci=34, line=1258 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.SelectorThread.run() @bci=1, line=1234 (Interpreted frame)

Thread 6625: (state = IN_NATIVE)
- sun.nio.ch.ServerSocketChannelImpl.accept0(java.io.FileDescriptor, java.io.FileDescriptor, java.net.InetSocketAddress[]) @bci=0 (Interpreted frame)
- sun.nio.ch.ServerSocketChannelImpl.accept() @bci=94, line=145 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.SelectorThread.handleAccept(java.nio.channels.SelectionKey) @bci=9, line=1478 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.SelectorThread.handleConnection(java.nio.channels.SelectionKey) @bci=16, line=1457 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.SelectorThread.doSelect() @bci=84, line=1361 (Compiled frame)
- com.sun.enterprise.web.connector.grizzly.SelectorThread.startListener() @bci=25, line=1295 (Compiled frame)
- com.sun.enterprise.web.connector.grizzly.SelectorThread.startEndpoint() @bci=34, line=1258 (Interpreted frame)
- com.sun.enterprise.web.connector.grizzly.SelectorThread.run() @bci=1, line=1234 (Interpreted frame)

Thread 6605: (state = IN_NATIVE)
- java.io.UnixFileSystem.canonicalize0(java.lang.String) @bci=0 (Interpreted frame)
- java.io.UnixFileSystem.canonicalize(java.lang.String) @bci=140, line=157 (Compiled frame)
- java.io.File.getCanonicalPath() @bci=10, line=559 (Interpreted frame)
- org.apache.derby.impl.io.DirStorageFactory.doInit() @bci=119 (Interpreted frame)
- org.apache.derby.impl.io.BaseStorageFactory.init(java.lang.String, java.lang.String, java.lang.String, java.lang.String) @bci=51 (Interpreted frame)
- org.apache.derby.impl.services.monitor.StorageFactoryService.privGetStorageFactoryInstance(boolean, java.lang.String, java.lang.String, java.lang.String) @bci=92 (Interpreted frame)
- org.apache.derby.impl.services.monitor.StorageFactoryService.access$400(org.apache.derby.impl.services.monitor.StorageFactoryService, boolean, java.lang.String, java.lang.String, java.lang.String) @bci=6 (Interpreted frame)
- org.apache.derby.impl.services.monitor.StorageFactoryService$11.run() @bci=11 (Interpreted frame)
- java.security.AccessController.doPrivileged(java.security.PrivilegedExceptionAction) @bci=0 (Compiled frame)
Error occurred during stack walking:

Thread 6598: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.Object.wait() @bci=2, line=485 (Interpreted frame)
- java.util.TimerThread.mainLoop() @bci=28, line=483 (Interpreted frame)
- java.util.TimerThread.run() @bci=1, line=462 (Interpreted frame)

Thread 6482: (state = IN_NATIVE)
- java.io.UnixFileSystem.getBooleanAttributes0(java.io.File) @bci=0 (Compiled frame; information may be imprecise)
Error occurred during stack walking:

Thread 6480: (state = IN_VM)
Error occurred during stack walking:

Thread 6475: (state = IN_VM)
- com.sun.messaging.jmq.jmsclient.ProtocolHandler.writePacketNoAck(com.sun.messaging.jmq.io.ReadWritePacket) @bci=9, line=367 (Interpreted frame)
- com.sun.messaging.jmq.jmsclient.ProtocolHandler.pingReply(com.sun.messaging.jmq.io.ReadOnlyPacket) @bci=60, line=4067 (Interpreted frame)
- com.sun.messaging.jmq.jmsclient.ReadChannel.processPing(com.sun.messaging.jmq.io.ReadOnlyPacket) @bci=15, line=342 (Interpreted frame)
- com.sun.messaging.jmq.jmsclient.ReadChannel.dispatch(com.sun.messaging.jmq.io.ReadWritePacket) @bci=338, line=195 (Interpreted frame)
- com.sun.messaging.jmq.jmsclient.ReadChannel.run() @bci=19, line=1205 (Interpreted frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6474: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- com.sun.messaging.jmq.jmsclient.FlowControl.run() @bci=31, line=301 (Compiled frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6473: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- com.sun.messaging.jmq.jmsclient.SessionQueue.dequeueWait(long) @bci=46, line=236 (Interpreted frame)
- com.sun.messaging.jmq.jmsclient.ConsumerReader.run() @bci=54, line=162 (Interpreted frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6470: (state = BLOCKED)
- com.sun.messaging.jmq.jmsclient.ProtocolHandler.writePacketNoAck(com.sun.messaging.jmq.io.ReadWritePacket) @bci=9, line=367 (Interpreted frame)
- com.sun.messaging.jmq.jmsclient.ProtocolHandler.pingReply(com.sun.messaging.jmq.io.ReadOnlyPacket) @bci=60, line=4067 (Interpreted frame)
- com.sun.messaging.jmq.jmsclient.ReadChannel.processPing(com.sun.messaging.jmq.io.ReadOnlyPacket) @bci=15, line=342 (Interpreted frame)
- com.sun.messaging.jmq.jmsclient.ReadChannel.dispatch(com.sun.messaging.jmq.io.ReadWritePacket) @bci=338, line=195 (Interpreted frame)
- com.sun.messaging.jmq.jmsclient.ReadChannel.run() @bci=19, line=1205 (Interpreted frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6469: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- com.sun.messaging.jmq.jmsclient.FlowControl.run() @bci=31, line=301 (Compiled frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6413: (state = IN_NATIVE)
- java.lang.UNIXProcess.waitForProcessExit(int) @bci=0 (Interpreted frame)
- java.lang.UNIXProcess.access$900(java.lang.UNIXProcess, int) @bci=2, line=20 (Interpreted frame)
- java.lang.UNIXProcess$1$1.run() @bci=165, line=132 (Interpreted frame)

Thread 6409: (state = BLOCKED)
Error occurred during stack walking:

Thread 6407: (state = BLOCKED)
- java.lang.Thread.setPriority0(int) @bci=0 (Interpreted frame)
- java.lang.Thread.setPriority(int) @bci=52, line=1021 (Interpreted frame)
- java.lang.Thread.init(java.lang.ThreadGroup, java.lang.Runnable, java.lang.String, long) @bci=151, line=356 (Interpreted frame)
- java.lang.Thread.(java.lang.ThreadGroup, java.lang.Runnable, java.lang.String) @bci=45, line=503 (Interpreted frame)
- sun.rmi.runtime.NewThreadAction.run() @bci=49, line=116 (Interpreted frame)
- sun.rmi.runtime.NewThreadAction.run() @bci=1, line=34 (Interpreted frame)
- java.security.AccessController.doPrivileged(java.security.PrivilegedAction) @bci=0 (Compiled frame)
Error occurred during stack walking:

Thread 6406: (state = IN_NATIVE)
- java.net.PlainSocketImpl.socketAccept(java.net.SocketImpl) @bci=0 (Interpreted frame)
- java.net.PlainSocketImpl.accept(java.net.SocketImpl) @bci=7, line=390 (Interpreted frame)
- java.net.ServerSocket.implAccept(java.net.Socket) @bci=60, line=453 (Interpreted frame)
- java.net.ServerSocket.accept() @bci=48, line=421 (Interpreted frame)
- sun.rmi.transport.tcp.TCPTransport$AcceptLoop.executeAcceptLoop() @bci=55, line=369 (Interpreted frame)
- sun.rmi.transport.tcp.TCPTransport$AcceptLoop.run() @bci=1, line=341 (Interpreted frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6403: (state = BLOCKED)
- sun.misc.Unsafe.park(boolean, long) @bci=0 (Interpreted frame)
- java.util.concurrent.locks.LockSupport.park(java.lang.Object) @bci=14, line=158 (Interpreted frame)
- java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await() @bci=42, line=1987 (Interpreted frame)
- java.util.concurrent.LinkedBlockingQueue.take() @bci=29, line=399 (Interpreted frame)
- com.sun.enterprise.management.support.LoaderRegThread.processFOREVER() @bci=4, line=263 (Interpreted frame)
- com.sun.enterprise.management.support.LoaderRegThread.run() @bci=1, line=311 (Interpreted frame)

Thread 6402: (state = BLOCKED)
- java.lang.Thread.sleep(long) @bci=0 (Interpreted frame)
- com.sun.enterprise.management.support.LoaderBase.mySleep(long) @bci=3, line=239 (Interpreted frame)
- com.sun.enterprise.management.support.Loader$DeferredRegistrationThread.run() @bci=107, line=400 (Interpreted frame)

Thread 6400: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.Object.wait() @bci=2, line=485 (Interpreted frame)
- com.sun.corba.ee.impl.javax.rmi.CORBA.KeepAlive.run() @bci=8, line=857 (Interpreted frame)

Thread 6399: (state = IN_NATIVE)
- java.net.PlainSocketImpl.socketAccept(java.net.SocketImpl) @bci=0 (Interpreted frame)
- java.net.PlainSocketImpl.accept(java.net.SocketImpl) @bci=7, line=390 (Interpreted frame)
- java.net.ServerSocket.implAccept(java.net.Socket) @bci=60, line=453 (Interpreted frame)
- com.sun.net.ssl.internal.ssl.SSLServerSocketImpl.accept() @bci=38, line=259 (Interpreted frame)
- com.sun.corba.ee.impl.transport.SocketOrChannelAcceptorImpl.accept() @bci=15, line=250 (Interpreted frame)
- com.sun.corba.ee.impl.transport.ListenerThreadImpl.doWork() @bci=83, line=107 (Interpreted frame)
- com.sun.corba.ee.impl.orbutil.threadpool.ThreadPoolImpl$WorkerThread.run() @bci=100, line=555 (Interpreted frame)

Thread 6398: (state = IN_NATIVE)
- java.net.PlainSocketImpl.socketAccept(java.net.SocketImpl) @bci=0 (Interpreted frame)
- java.net.PlainSocketImpl.accept(java.net.SocketImpl) @bci=7, line=390 (Interpreted frame)
- java.net.ServerSocket.implAccept(java.net.Socket) @bci=60, line=453 (Interpreted frame)
- com.sun.net.ssl.internal.ssl.SSLServerSocketImpl.accept() @bci=38, line=259 (Interpreted frame)
- com.sun.corba.ee.impl.transport.SocketOrChannelAcceptorImpl.accept() @bci=15, line=250 (Interpreted frame)
- com.sun.corba.ee.impl.transport.ListenerThreadImpl.doWork() @bci=83, line=107 (Interpreted frame)
- com.sun.corba.ee.impl.orbutil.threadpool.ThreadPoolImpl$WorkerThread.run() @bci=100, line=555 (Interpreted frame)

Thread 6397: (state = IN_NATIVE)
- sun.nio.ch.EPollArrayWrapper.epollWait(long, int, long, int) @bci=0 (Compiled frame; information may be imprecise)
Error occurred during stack walking:

Thread 6396: (state = BLOCKED)
- com.sun.corba.ee.impl.orbutil.threadpool.WorkQueueImpl.addWork(com.sun.corba.ee.spi.orbutil.threadpool.Work) @bci=0, line=140 (Interpreted frame)
- com.sun.ejb.base.container.ContainerServiceImpl.scheduleWork(java.lang.ClassLoader, java.lang.Runnable) @bci=32, line=96 (Interpreted frame)
- com.sun.ejb.containers.PeriodicTask.run() @bci=21, line=2815 (Interpreted frame)
- java.util.TimerThread.mainLoop() @bci=221, line=512 (Compiled frame)
- java.util.TimerThread.run() @bci=1, line=462 (Interpreted frame)

Thread 6395: (state = BLOCKED)
- java.lang.Thread.setPriority0(int) @bci=0 (Interpreted frame)
- java.lang.Thread.setPriority(int) @bci=52, line=1021 (Interpreted frame)
- java.lang.Thread.init(java.lang.ThreadGroup, java.lang.Runnable, java.lang.String, long) @bci=151, line=356 (Interpreted frame)
- java.lang.Thread.(java.lang.ThreadGroup, java.lang.String) @bci=45, line=433 (Interpreted frame)
- com.sun.corba.ee.impl.orbutil.threadpool.ThreadPoolImpl$WorkerThread.(com.sun.corba.ee.impl.orbutil.threadpool.ThreadPoolImpl, java.lang.ThreadGroup, java.lang.String) @bci=37, line=496 (Interpreted frame)
- com.sun.corba.ee.impl.orbutil.threadpool.ThreadPoolImpl.createWorkerThreadHelper(java.lang.String) @bci=10, line=316 (Interpreted frame)
- com.sun.corba.ee.impl.orbutil.threadpool.ThreadPoolImpl.createWorkerThread() @bci=20, line=341 (Interpreted frame)
- com.sun.corba.ee.impl.orbutil.threadpool.WorkQueueImpl.addWork(com.sun.corba.ee.spi.orbutil.threadpool.Work) @bci=86, line=161 (Interpreted frame)
- com.sun.ejb.containers.util.ContainerWorkPool.addLast(com.sun.corba.ee.spi.orbutil.threadpool.Work) @bci=18, line=89 (Interpreted frame)
- com.sun.ejb.containers.util.ContainerWorkPool.addLast(com.sun.enterprise.util.threadpool.Servicable) @bci=8, line=74 (Interpreted frame)
- com.sun.ejb.containers.util.pool.NonBlockingPool$PoolResizeTimerTask.run() @bci=26, line=631 (Interpreted frame)
- java.util.TimerThread.mainLoop() @bci=221, line=512 (Compiled frame)
- java.util.TimerThread.run() @bci=1, line=462 (Interpreted frame)

Thread 6394: (state = IN_NATIVE)
- java.io.UnixFileSystem.getBooleanAttributes0(java.io.File) @bci=0 (Compiled frame; information may be imprecise)
Error occurred during stack walking:

Thread 6393: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.Object.wait() @bci=2, line=485 (Interpreted frame)
- java.util.TimerThread.mainLoop() @bci=28, line=483 (Interpreted frame)
- java.util.TimerThread.run() @bci=1, line=462 (Interpreted frame)

Thread 6391: (state = BLOCKED)
- sun.misc.Unsafe.park(boolean, long) @bci=0 (Interpreted frame)
- java.util.concurrent.locks.LockSupport.parkNanos(java.lang.Object, long) @bci=20, line=198 (Compiled frame)
- java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(long) @bci=68, line=2025 (Compiled frame)
- java.util.concurrent.DelayQueue.take() @bci=57, line=164 (Compiled frame)
- java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take() @bci=4, line=583 (Interpreted frame)
- java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take() @bci=1, line=576 (Interpreted frame)
- java.util.concurrent.ThreadPoolExecutor.getTask() @bci=78, line=947 (Interpreted frame)
- java.util.concurrent.ThreadPoolExecutor$Worker.run() @bci=18, line=907 (Interpreted frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6388: (state = BLOCKED)
- java.lang.Runtime.gc() @bci=0 (Interpreted frame)
- java.lang.System.gc() @bci=3, line=926 (Interpreted frame)
- sun.misc.GC$Daemon.run() @bci=38, line=92 (Interpreted frame)

Thread 6387: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.ref.ReferenceQueue.remove(long) @bci=44, line=118 (Interpreted frame)
- java.lang.ref.ReferenceQueue.remove() @bci=2, line=134 (Interpreted frame)
- sun.rmi.transport.ObjectTable$Reaper.run() @bci=3, line=333 (Interpreted frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6386: (state = IN_VM)
- java.lang.Thread.start0() @bci=0 (Interpreted frame)
- java.lang.Thread.start() @bci=24, line=597 (Interpreted frame)
- java.util.concurrent.ThreadPoolExecutor.addIfUnderMaximumPoolSize(java.lang.Runnable) @bci=64, line=727 (Interpreted frame)
- java.util.concurrent.ThreadPoolExecutor.execute(java.lang.Runnable) @bci=75, line=657 (Interpreted frame)
- sun.rmi.transport.tcp.TCPTransport$AcceptLoop.executeAcceptLoop() @bci=94, line=384 (Interpreted frame)
- sun.rmi.transport.tcp.TCPTransport$AcceptLoop.run() @bci=1, line=341 (Interpreted frame)
- java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)

Thread 6370: (state = BLOCKED)

Thread 6369: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.ref.ReferenceQueue.remove(long) @bci=44, line=118 (Compiled frame)
- java.lang.ref.ReferenceQueue.remove() @bci=2, line=134 (Compiled frame)
- java.lang.ref.Finalizer$FinalizerThread.run() @bci=3, line=159 (Compiled frame)

Thread 6368: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- java.lang.Object.wait() @bci=2, line=485 (Compiled frame)
- java.lang.ref.Reference$ReferenceHandler.run() @bci=46, line=116 (Compiled frame)

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shenoy16
Offline
Joined: 2012-05-09

Glassfish Gurus,

Any help would be greatly appreciated. Any glassfish settings which might help ? Let me know if there is any piece of information is missing I can provide the same.

Thanks

shenoy16
Offline
Joined: 2012-05-09

Tried increasing acceptor threads and file descriptor limits , as per a blog, but that did not help. Still see the grizzly threads blocked , with serveral connections in CLOSE_WAIT. the server just refuses to accept any connections after this.

Has anyone else has come across this and found a concrete solution ?