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https://issues.apache.org/jira/browse/KUDU-2215?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon reassigned KUDU-2215:
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Assignee: Todd Lipcon
> kernel stack watchdog can delay thread exits
> --------------------------------------------
>
> Key: KUDU-2215
> URL: https://issues.apache.org/jira/browse/KUDU-2215
> Project: Kudu
> Issue Type: Bug
> Components: perf, util
> Affects Versions: 1.6.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
>
> KernelStackWatchdog::Unregister can block if the watchdog is currently in the
> process of dumping a thread's stacks. The stack dumping can take several
> seconds in the worst case, so this can delay another thread from exiting.
> There's currently a comment indicating that we don't usually care about
> delaying thread exits, but there are actually a few places where we do join()
> on a thread. In particular, in earlier versions Peer::Close() joins on a
> ResettableHeartbeater and thus can get stuck for a while.
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