Good Morning All,
Since we go to production with CAS 5.1, we keep having growing Thread counts.
We use ehcache for HA implementation and ldap for authentication.
Two types of threads - Timer and pool-3-thread - keep growing as time goes.
Any suggestion to debug this issue?
Thread dump :
Full thread dump OpenJDK 64-Bit Server VM (25.101-b13 mixed mode):
"Timer-73" #512 daemon prio=5 os_prio=0 tid=0x00007f0520033000 nid=0x8041 in
Object.wait() [0x00007f0509b5c000]
java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
at java.util.TimerThread.mainLoop(Timer.java:552)
- locked <0x00000000afb48f10> (a java.util.TaskQueue)
at java.util.TimerThread.run(Timer.java:505)
"Timer-72" #509 daemon prio=5 os_prio=0 tid=0x00007f0520019800 nid=0x7fbc in
Object.wait() [0x00007f050a469000]
java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
at java.util.TimerThread.mainLoop(Timer.java:552)
- locked <0x00000000afa333a0> (a java.util.TaskQueue)
at java.util.TimerThread.run(Timer.java:505)
"pool-3-thread-23" #508 prio=5 os_prio=0 tid=0x00007f05180b3000 nid=0x7f36
waiting on condition [0x00007f0509d60000]
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00000000a7f17930> (a
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
at
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
at
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
"Timer-71" #507 daemon prio=5 os_prio=0 tid=0x00007f05180b8800 nid=0x7f35 in
Object.wait() [0x00007f0509f62000]
java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
at java.util.TimerThread.mainLoop(Timer.java:552)
- locked <0x00000000af974c00> (a java.util.TaskQueue)
at java.util.TimerThread.run(Timer.java:505)
"Timer-70" #506 daemon prio=5 os_prio=0 tid=0x00007f05506ba000 nid=0x7eb4 in
Object.wait() [0x00007f0509e61000]
java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
at java.util.TimerThread.mainLoop(Timer.java:552)
- locked <0x00000000af8cf808> (a java.util.TaskQueue)
at java.util.TimerThread.run(Timer.java:505)
"pool-3-thread-22" #496 prio=5 os_prio=0 tid=0x00007f05180b7800 nid=0x79dd
waiting on condition [0x00007f050a063000]
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00000000a7f17930> (a
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
at
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
at
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
Thanks,
Doe
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