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https://issues.apache.org/jira/browse/KARAF-7707?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17741899#comment-17741899
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Daniel van Mil commented on KARAF-7707:
---------------------------------------
It's just by opening and (maybe) typing some text, but not even running a
command like log:tail etc.
> Eternal high CPU load when using Gogo plugin in web console
> -----------------------------------------------------------
>
> Key: KARAF-7707
> URL: https://issues.apache.org/jira/browse/KARAF-7707
> Project: Karaf
> Issue Type: Question
> Components: webconsole
> Affects Versions: 4.4.0
> Reporter: Daniel van Mil
> Assignee: Jean-Baptiste Onofré
> Priority: Major
>
> Sometimes when we open (and sometimes not even interact) with the Karaf web
> console Gogo plugin we get a very high CPU load (100%) from that point and
> Karaf never seems to recover from this.
>
> {code:java}
> Analysis of the showed us the following thread caused this:
> "Thread-210" #16393 prio=5 os_prio=0 cpu=22819544.54ms elapsed=77820.53s
> tid=0x00007f21101c86c0 nid=0x406e runnable [0x00007f20c319a000]
> java.lang.Thread.State: RUNNABLE
> at
> org.apache.karaf.webconsole.gogo.GogoPlugin$SessionTerminal.run(GogoPlugin.java:247)
> at java.lang.Thread.run([email protected]/Thread.java:833)
> Locked ownable synchronizers:
> None{code}
> which points to the GogoPlugin.
> A quick look at the gogo plugin shows some suspicious code:
> [https://github.com/apache/karaf/blob/main/webconsole/gogo/src/main/java/org/apache/karaf/webconsole/gogo/GogoPlugin.java#L55]
> where the plugin could end in and endless loop causing high CPU load.
> Strange thing is we can only find a few appearances of people who ran into
> this, like
> [https://community.talend.com/s/question/0D53p00007vCkucCAC/runtime-esb-high-cpu-load-caused-by-webconsole-gogo-?language=en_US]
> It could be caused by the fact that we run Karaf on AWS and also behind an
> nginx, but by debugging Karaf locally we can also reproduce the issue
> somehow; the plugin sometimes receives strange characters and seems to go
> into an endless loop.
> Is this a known issue?
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