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http://jira.codehaus.org/browse/MEXEC-18?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_86921
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Ryan Sonnek commented on MEXEC-18:
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I've examined my thread dump and *all* active threads are daemon threads.
These daemon threads do *not* allow for interruption (they swallow
InterruptedException). I've been able to verify that these daemon threads are
preventing the exec:java plugin from shutting down. (by hacking the daemon
threads to not swallow InterruptedException).
Daemon threads *should* be treated differently than normal threads. If a
daemon thread is not responding to interruption, the exec:java plugin should
ignore it and continue shutting down. of course logging the behavior is nice
too.
> un-stopped damean threads prevent plugin shutdown
> -------------------------------------------------
>
> Key: MEXEC-18
> URL: http://jira.codehaus.org/browse/MEXEC-18
> Project: Mojo Exec Plugin
> Issue Type: Bug
> Affects Versions: 1.1
> Environment: using latest snapshot
> Reporter: Ryan Sonnek
>
> my application is using daemon threads, and the exec:java plugin just hangs.
> {noformat}
> [DEBUG] interrupting thread Thread[Lazy
> Clock,1,com.digitalriver.schedule.JobRunner]
> [DEBUG] joining on thread Thread[Lazy
> Clock,1,com.digitalriver.schedule.JobRunner]
> {noformat}
> since these are daemon threads, the exec:java plugin should try to
> interrupt/join, but exit cleanly without worrrying about them.
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