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  1. Jenkins
  2. JENKINS-21649

High CPU Usage on master while slaves working (multijob)

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    • Icon: Bug Bug
    • Resolution: Fixed
    • Icon: Major Major
    • multijob-plugin
    • None
    • Ubuntu 12.04, Oracle Java 7
      java version "1.7.0_51"
      Java(TM) SE Runtime Environment (build 1.7.0_51-b13)
      Java HotSpot(TM) 64-Bit Server VM (build 24.51-b03, mixed mode)

      When a slave is running a build in a multijob plugin, the monitoring thread on the master eats up 100% of a CPU core.
      This scales linearly-- so when I have 4 parallel jobs running, jenkins master is using 400% cpu.

      Attaching screen cap of profiler output, as well as YourKit profiler snapshot.

        1. jenkins.war-2014-02-04-2.snapshot
          8.57 MB
        2. ProfilerStackTrace.jpg
          ProfilerStackTrace.jpg
          645 kB

            itai itai Or
            smolyn greg smolyn
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              Created:
              Updated:
              Resolved: