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Posted to issues-all@impala.apache.org by "Tim Armstrong (JIRA)" <ji...@apache.org> on 2018/10/31 17:57:00 UTC

[jira] [Updated] (IMPALA-3291) Pause monitor thread should check that the tcmalloc heap does not block

     [ https://issues.apache.org/jira/browse/IMPALA-3291?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tim Armstrong updated IMPALA-3291:
----------------------------------
    Issue Type: Improvement  (was: Bug)

> Pause monitor thread should check that the tcmalloc heap does not block
> -----------------------------------------------------------------------
>
>                 Key: IMPALA-3291
>                 URL: https://issues.apache.org/jira/browse/IMPALA-3291
>             Project: IMPALA
>          Issue Type: Improvement
>          Components: Backend
>    Affects Versions: Impala 2.6.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Minor
>
> IMPALA-3114 added a "pause monitor" process which wakes up periodically to check that there are no pauses. However, it doesn't do anything when it wakes up aside from check the time. Since it does no allocation, it won't notice pauses like IMPALA-2800 where tcmalloc is holding a process-wide lock for many seconds. The pause monitor should do some allocation so that it can warn if the heap lock is blocked.



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