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https://issues.apache.org/jira/browse/GERONIMO-4871?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12770576#action_12770576
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Quintin Beukes commented on GERONIMO-4871:
------------------------------------------

Check if the -Xrs option is specified perhaps, by echoing the final command 
used to start the JVM. -Xrs disables this.

Further, try adding a shutdown hook and the doing a SIGTERM. Check if the 
shutdown hooks execute, but the thread dump doesn't work, or if neither work.

Q

> Something blocking 'kill -3' signals?
> -------------------------------------
>
>                 Key: GERONIMO-4871
>                 URL: https://issues.apache.org/jira/browse/GERONIMO-4871
>             Project: Geronimo
>          Issue Type: Bug
>      Security Level: public(Regular issues) 
>            Reporter: Kevan Miller
>             Fix For: 2.2.1
>
>
> I occasionally use 'kill -3' to cause a java process to dump all thread 
> stacks. For some reason, this isn't working on Geronimo 2.2

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