[JIRA] (JENKINS-62039) Jenkins ping thread freezing other threads

[arni...@mail.ru (JIRA)]

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Владислав Ненашев created an issue   Jenkins / JENKINS-62039 Jenkins ping thread freezing other threads Issue Type: Bug Assignee: Jeff Thompson Attachments: image-2020-04-24-13-01-39-109.png, Untitled.jpg Components: core, remoting Created: 2020-04-24 06:05 Priority: Minor Reporter: Владислав Ненашев We got a situation on Jenkins ver. 2.204.2 when the ping to the build agent connected via ssh actually started blocking other requests due to delays in the response from the agent, including the web interface gave a timeout, we did not wait for a ping response from the agent and restarted the master A problematic thread for which we also saw a large CPU load   "Executor #3 for tkles-jenci0013" #899694 daemon prio=5 os_prio=0 tid=0x000000000179c800 nid=0x4f9 runnable [0x00007f3b7a2b0000]"Executor #3 for tkles-jenci0013" #899694 daemon prio=5 os_prio=0 tid=0x000000000179c800 nid=0x4f9 runnable [0x00007f3b7a2b0000]   java.lang.Thread.State: RUNNABLE at java.lang.Thread.setPriority0(Native Method) at java.lang.Thread.setPriority(Thread.java:1095) at java.lang.Thread.init(Thread.java:417) at java.lang.Thread.init(Thread.java:349) at java.lang.Thread.<init>(Thread.java:678) at java.util.concurrent.Executors$DefaultThreadFactory.newThread(Executors.java:613) at hudson.util.DaemonThreadFactory.newThread(DaemonThreadFactory.java:46) at hudson.util.ExceptionCatchingThreadFactory.newThread(ExceptionCatchingThreadFactory.java:50) at hudson.util.NamingThreadFactory.newThread(NamingThreadFactory.java:52) at java.util.concurrent.ThreadPoolExecutor$Worker.<init>(ThreadPoolExecutor.java:619) at java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:932) at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1378) at java.util.concurrent.CompletableFuture.asyncSupplyStage(CompletableFuture.java:1604) at java.util.concurrent.CompletableFuture.supplyAsync(CompletableFuture.java:1830) at jenkins.metrics.impl.JenkinsMetricProviderImpl$ScheduledRate.onLeft(JenkinsMetricProviderImpl.java:919) at hudson.model.Queue$LeftItem.enter(Queue.java:2788) at hudson.model.Queue.onStartExecuting(Queue.java:1168) at hudson.model.Executor$1.call(Executor.java:359) at hudson.model.Executor$1.call(Executor.java:345) at hudson.model.Queue._withLock(Queue.java:1451) at hudson.model.Queue.withLock(Queue.java:1312) at hudson.model.Executor.run(Executor.java:345)    Locked ownable synchronizers: - <0x000000025d637d48> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)   At this time, the waiting threads looked like this "jenkins.util.Timer [#6]" #117 daemon prio=5 os_prio=0 tid=0x00007f3b98002800 nid=0x12f1 waiting on condition [0x00007f3bea1e2000]"jenkins.util.Timer [#6]" #117 daemon prio=5 os_prio=0 tid=0x00007f3b98002800 nid=0x12f1 waiting on condition [0x00007f3bea1e2000]   java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for  <0x000000025d637d48> (a java.util.concurrent.locks.ReentrantLock$NonfairSync) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836) at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:870) at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1199) at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:209) at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:285) at hudson.model.Queue.maintain(Queue.java:1474) at hudson.model.Queue$MaintainTask.doRun(Queue.java:2898) at hudson.triggers.SafeTimerTask.run(SafeTimerTask.java:70) at jenkins.security.ImpersonatingScheduledExecutorService$1.run(ImpersonatingScheduledExecutorService.java:58) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) I think this is a global defect connecting to the slave via ssh   Add Comment   This message was sent by Atlassian Jira (v7.13.12#713012-sha1:6e07c38) -- You received this message because you are subscribed to the Google Groups "Jenkins Issues" group. To unsubscribe from this group and stop receiving emails from it, send an email to jenkinsci-issues+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-issues/JIRA.205930.1587708338000.16829.1587708360259%40Atlassian.JIRA.