[jira] [Created] (KARAF-2552) Running log:tail on admin:console causes full CPU usage.

["Mateo Ramey (JIRA)" <ji...@apache.org>]

Mateo Ramey created KARAF-2552:
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             Summary: 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


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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