Thread dumps||213threads are BLOCKED on sun.misc.Unsafe.park(boolean,. If threads are BLOCKED, application will become unresponsive. Examine below stacktrace to see why they are locked.
Hello Folks,
Have recently upgraded to Java7 from Java6 and hosting JBoss 7.1.1 AS in windows.
My application suddenly started encountering slowness, utilization on the server is normal memory and CPU.
The application works normal post restart of the instance until sometime but eventually slows down. Have captured multiple thread-dumps, around more than 200 threads are in the blocked state.
But unable to interpret the same, all the thread are containing the same content.
1 threads are in BLOCKED state across all dumps
Thread 42 - threadId:Thread 42 - state:BLOCKED
stackTrace:
- java.lang.Thread.sleep(long) @bci=0 (Compiled frame; information may be imprecise)
- org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run() @bci=22, line=1580 (Interpreted frame)
- java.lang.Thread.run() @bci=11 (Interpreted frame)
213 threads are in BLOCKED state across all dumps
stackTrace:
- sun.misc.Unsafe.park(boolean, long) @bci=0 (Compiled frame; information may be imprecise)
- java.util.concurrent.locks.LockSupport.parkNanos(java.lang.Object, long) @bci=20 (Interpreted frame)
- java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(long) @bci=68 (Interpreted frame)
- java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take() @bci=122 (Interpreted frame)
- java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take() @bci=1 (Interpreted frame)
- java.util.concurrent.ThreadPoolExecutor.getTask() @bci=156 (Interpreted frame)
- java.util.concurrent.ThreadPoolExecutor.runWorker(java.util.concurrent.ThreadPoolExecutor$Worker) @bci=26 (Compiled frame)
- java.util.concurrent.ThreadPoolExecutor$Worker.run() @bci=5 (Interpreted frame)
- java.lang.Thread.run() @bci=11 (Interpreted frame)
stackTrace:
- sun.misc.Unsafe.park(boolean, long) @bci=0 (Compiled frame; information may be imprecise)
- java.util.concurrent.locks.LockSupport.parkNanos(java.lang.Object, long) @bci=20 (Interpreted frame)
- java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(long) @bci=68 (Interpreted frame)
- java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take() @bci=122 (Interpreted frame)
- java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take() @bci=1 (Interpreted frame)
- java.util.concurrent.ThreadPoolExecutor.getTask() @bci=156 (Interpreted frame)
- java.util.concurrent.ThreadPoolExecutor.runWorker(java.util.concurrent.ThreadPoolExecutor$Worker) @bci=26 (Compiled frame)
- java.util.concurrent.ThreadPoolExecutor$Worker.run() @bci=5 (Interpreted frame)
- java.lang.Thread.run() @bci=11 (Interpreted frame)