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  1. Jenkins
  2. JENKINS-61023

Jenkins agent threads deadlock due to remoting.jar

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      Description

      ref) https://wiki.jenkins.io/display/JENKINS/Remoting+issue

       

      description:

      we setup jenkins master and several agents. one of agents periodically deadlocked and cpu spiked. I found It because SynchronousCommandTransport$ReaderThread.run from remoting.jar. (ref: https://wiki.jenkins.io/display/JENKINS/Remoting+issue)

      I added some screenshots. I really appreciate if you take a look and help us to find root cause.

       

      agent server stats:

       

      cpu usage:

       

      tracking PID 15699: ( It was remoting.jar )

       

      agentthread dump:  

       

       

      Thanks!

        Attachments

        1. channel thread.png
          channel thread.png
          77 kB
        2. cpu usage of remoting_jar.png
          cpu usage of remoting_jar.png
          20 kB
        3. remoting_jar ps.png
          remoting_jar ps.png
          13 kB
        4. stats.png
          stats.png
          134 kB

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            Assignee:
            jthompson Jeff Thompson
            Reporter:
            doubleknd26 Kideok Kim
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              Created:
              Updated: