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Issue Type:
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![Bug]() Bug
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Assignee:
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Kohsuke Kawaguchi
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Attachments:
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visualvm_cipherInputStream.png |
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Components:
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ssh-slaves |
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Created:
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21/Mar/14 10:55 AM
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Description:
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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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Environment:
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CentOS release 6.4 (Final)
OpenSSH_5.3p1, OpenSSL 1.0.0-fips 29 Mar 2010
Jenkins 1.532.1 LTS
apache-tomcat-6.0.37
ssh-slaves-plugin version 1.5
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Project:
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Jenkins
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Labels:
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1.532.1
slaves
trilead-ssh2-jenkins
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Priority:
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![Blocker]() Blocker
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Reporter:
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Klaus Azesberger
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