500 Threads spawned on PegaRULES on Pega 8.4.1
Hi ,
We see our environment performance declines. As a result of subsequent analysis of the problem, a marked increase in Java threads is observed within the JVM.
Upon looking at the thread dump we see the following pattern, can you tell me why is it going into parking to wait for 1 particular object (<0x00000005dd0001c0> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)) for around ~520 events
EPAM Systems
CH
Hi Marc, I am not able to share the full log here on the community. Shall I raise an SR for it or is there a way to provide you the log?
Hi Marc, I am not able to share the full log here on the community. Shall I raise an SR for it or is there a way to provide you the log?
2020-09-14 04:34:52,869 [sse-nio-8080-exec-41] [ ] [ ] [ ] (.timers.EnvironmentDiagnostics) INFO alive-construct.internal.vodafone.co.uk| Proprietary information hidden - --- Thread Dump Starts --- Full Java thread dump with locks info "HikariPool-2 connection closer" Id=22958 in TIMED_WAITING on lock=java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@1173c156 BlockedCount : 0, BlockedTime : -1, WaitedCount : 1, WaitedTime : -1 at sun.misc.Unsafe.park(Native Method) at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078) at java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:467) at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748)
"AsyncAppender-HEALTH-ASYNCAES" Id=123 in WAITING on lock=java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@658c3441 BlockedCount : 1, BlockedTime : -1, WaitedCount : 2855, WaitedTime : -1 at sun.misc.Unsafe.park(Native Method) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) at java.util.concurrent.ArrayBlockingQueue.take(ArrayBlockingQueue.java:403) at org.apache.logging.log4j.core.appender.AsyncAppender$AsyncThread.run(AsyncAppender.java:403)
Locked synchronizers: count = 0