[jboss-jira] [JBoss JIRA] Commented: (JBAS-4287) run.sh can consume 100% single CPU resources on Solaris

Mon Apr 23 01:21:33 EDT 2007

    [ http://jira.jboss.com/jira/browse/JBAS-4287?page=comments#action_12360172 ] 

Quenten Alick commented on JBAS-4287:
-------------------------------------

Thanks Ian.  I've tried the patch on Solaris (SPARC) 8, 9 & 10 and it worked fine, run.sh behaved perfectly.

> run.sh can consume 100% single CPU resources on Solaris
> -------------------------------------------------------
>
>                 Key: JBAS-4287
>                 URL: http://jira.jboss.com/jira/browse/JBAS-4287
>             Project: JBoss Application Server
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: Other
>    Affects Versions: JBossAS-4.0.5.GA
>         Environment: Solaris on SPARC (version 9 & 10)
>            Reporter: Quenten Alick
>         Attachments: run.sh, run.sh.patch
>
>
> When shutting down jboss the run.sh script remain alive and consumes 100% of a single CPUs resources.  run.sh needs to be killed off.
> To trigger the bug, you need to 
> 1) set LAUNCH_JBOSS_IN_BACKGROUND
> 2) start the jboss server normally
> 3) Once it's started stop the server
> At this point the JVM stops, however the run.sh script remains running consuming 100% of a single CPUs resources.
> The problem seems to be this bit of script, plus the fact that the script shebang is #!/bin/sh 
> while [ "$WAIT_STATUS" -ne 127 ]; do
>          JBOSS_STATUS=$WAIT_STATUS
>          wait $JBOSS_PID 2>/dev/null
>          WAIT_STATUS=$?
> done 
> On Solaris, /bin/sh is *real* bourne shell and the wait shell-built-in for /bin/sh on Solaris returns 0 (not 127) if the PID (passed as an argument) doesn't exist. The man page for wait states that this is the correct behaviour.  Therefore wait returns 0 and the while loop continues forever burning up CPU resources (until you kill it with one of the signals not being trapped). 
> Here's a link to the patch that may have introduced the bug.
> http://jira.jboss.com/jira/browse/JBAS-3748 

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