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Type:
Bug
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Resolution: Unresolved
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Priority:
Major
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Component/s: github-plugin
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Environment:1.580.2
A Jenkins instance using this plugin was found to have more than 4400 threads with this stack trace:
"Waiting to acquire /…/workspace/… : Computer.threadPoolForRemoting [#37]" daemon prio=10 tid=0x… nid=0x… in Object.wait() [0x…]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
at java.lang.Object.wait(Object.java:503)
at hudson.slaves.WorkspaceList.acquire(WorkspaceList.java:245)
- locked <0x…> (a hudson.slaves.WorkspaceList)
at hudson.slaves.WorkspaceList.acquire(WorkspaceList.java:224)
- locked <0x…> (a hudson.slaves.WorkspaceList)
at hudson.model.AbstractProject.pollWithWorkspace(AbstractProject.java:1446)
at hudson.model.AbstractProject._poll(AbstractProject.java:1425)
at hudson.model.AbstractProject.poll(AbstractProject.java:1336)
at com.cloudbees.jenkins.GitHubPushTrigger$1.runPolling(GitHubPushTrigger.java:81)
at com.cloudbees.jenkins.GitHubPushTrigger$1.run(GitHubPushTrigger.java:106)
at hudson.util.SequentialExecutionQueue$QueueEntry.run(SequentialExecutionQueue.java:118)
at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Looking at the logs, there were 1150 GitHub push notifications for this job over 12 hours. Each created a polling thread and competed for a lock on the workspace. Each polling request took 1-6 seconds.
Such a high thread count had other knock on effects, such as high CPU usage when counting threads.
So we should figure out a way to either eliminate the duplicate polling or just keep the thread count down.
- is related to
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- Resolved
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