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  1. Jenkins
  2. JENKINS-22297

ssh-slave connection seems to have performance issues

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      Description

      hi,

      we experienced increasingly high amounts of CPU usage on our jenkins master machine:
      i made a CPU sample using visualVM (screenshot attached)
      the sample shows excessive CPU-time at CipherInputStream.fill_buffer() which performs the actual read from the ssh-connection as far as i understand this.
      the sample only looks like this when a build is performed on a slave. I'm pretty sure the main cause of traffic via CipherInputStream is to stream logfiles of builds or other stuff that's getting archived.

      the slaves are running on
      CentOS release 6.4 (Final)
      [kazesberger@grzcislave32 ~]$ ssh -V
      OpenSSH_5.3p1, OpenSSL 1.0.0-fips 29 Mar 2010

      the jenkins-master has no execution-slots itself.
      we are using ssh-slaves-plugin version 1.5

      currently i do not have any clue whether the problem is at trilead-ssh2-jenkins or at OpenSSH. the symptom occurs on the trilead-ssh2-jenkins side.

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            mcklaus Klaus Azesberger created issue -
            jidehem Jean-David Maillefer made changes -
            Field Original Value New Value
            Link This issue is duplicated by JENKINS-22320 [ JENKINS-22320 ]
            jidehem Jean-David Maillefer made changes -
            Link This issue is related to JENKINS-20550 [ JENKINS-20550 ]
            rtyler R. Tyler Croy made changes -
            Workflow JNJira [ 154378 ] JNJira + In-Review [ 178780 ]
            ifernandezcalvo Ivan Fernandez Calvo made changes -
            Assignee Kohsuke Kawaguchi [ kohsuke ] Ivan Fernandez Calvo [ ifernandezcalvo ]
            ifernandezcalvo Ivan Fernandez Calvo made changes -
            Resolution Fixed [ 1 ]
            Status Open [ 1 ] Closed [ 6 ]

              People

              Assignee:
              ifernandezcalvo Ivan Fernandez Calvo
              Reporter:
              mcklaus Klaus Azesberger
              Votes:
              4 Vote for this issue
              Watchers:
              4 Start watching this issue

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                Created:
                Updated:
                Resolved: