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From "Freeman Fang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KARAF-2552) Running log:tail on admin:console causes full CPU usage.
Date Mon, 11 Nov 2013 07:45:24 GMT

    [ https://issues.apache.org/jira/browse/KARAF-2552?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13818754#comment-13818754
] 

Freeman Fang commented on KARAF-2552:
-------------------------------------

Sure, Done!

> Running log:tail on admin:console causes full CPU usage.
> --------------------------------------------------------
>
>                 Key: KARAF-2552
>                 URL: https://issues.apache.org/jira/browse/KARAF-2552
>             Project: Karaf
>          Issue Type: Bug
>          Components: karaf-shell
>    Affects Versions: 2.3.3
>         Environment: Mac OS X on java version "1.7.0_45" and java version "1.6.0_65"
> Windows 7 on java version "1.6.0_41"
>            Reporter: Mateo Ramey
>            Assignee: Freeman Fang
>            Priority: Critical
>             Fix For: 2.4.0, 3.0.0, 2.3.4
>
>
> Running log:tail on the admin console causes 100% cpu usage. There were no logs being
shown during the tail, just simply running the tail is causing the CPU to spike up.
> Steps to reproduce:
> 1) Download Karaf 2.3.3 distribution.
> 2) Start karaf
> 3) run log:tail command
> 4) Watch CPU monitor (top in *nix or task manager in windows) show full cpu usage
> 5) ctrl-c out of log:tail and CPU usage goes back to idle.
> Attaching a profiler to Karaf identified the method taking up CPU as:
> org.apache.karaf.shell.console.jline.DelayedStarted.run()
> Not sure if that is fully accurate, but might be a place to start.
> Note: Was unable to reproduce issue on Karaf 2.3.2 and as a result we have had to revert
back to that version.
> Let me know if you have any additional questions.
> Thanks!



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