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Issue Type:
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![Bug]() Bug
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Affects Versions:
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current |
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Assignee:
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Unassigned |
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Attachments:
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threadCount.png, threadlist.txt |
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Components:
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master-slave |
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Created:
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27/Jan/14 7:11 AM
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Description:
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Since version 1.4x we've had a problem where threads continue to keep climbing without releasing. We upped the default file handlers to 8192 on the machine but we reach that limit as well. I've provided a JavaMelody graph as well as a current thread list.
It appears that we keep spawning Thread-pools but I'm not sure how to debug /why/ we keep spawning thread pools and why they don't clean up. Nearly all of the spawned threads look as such:
"pool-1451-thread-1" prio=5 WAITING
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043)
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:386)
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1043)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1103)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
java.lang.Thread.run(Thread.java:679)".
It's very little to go on. It appears they aren't doing anything (see attached for the full list). Could use some help with triage/debugging this problem. It's really starting to kill us with having to run monitors on thre thread pool and restart jenkins before they overrun.
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Environment:
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Jenkins Master Server running 1.538 running on CentOS 6.2, Java 1.6.0_24
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Project:
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Jenkins
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Labels:
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jenkins
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Priority:
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![Critical]() Critical
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Reporter:
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Maxfield Stewart
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