[jira] [Resolved] (IMPALA-4487) stress test occasionally leaves runners lingering

["Tim Armstrong (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-4487?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tim Armstrong resolved IMPALA-4487.
-----------------------------------
    Resolution: Cannot Reproduce

We fixed a lot of issues in the stress test last year.

> stress test occasionally leaves runners lingering
> -------------------------------------------------
>
>                 Key: IMPALA-4487
>                 URL: https://issues.apache.org/jira/browse/IMPALA-4487
>             Project: IMPALA
>          Issue Type: Bug
>          Components: Infrastructure
>    Affects Versions: Impala 2.8.0
>            Reporter: Michael Brown
>            Priority: Major
>              Labels: stress
>         Attachments: stacks.txt
>
>
> The stress test runner {{concurrent_select.py}} sometimes continues to run after all the requested queries have been executed. This will be evident from the console report: the number of Done queries will be the number of queries set by {{concurrent_select.py --max-queries}} but {{concurrent_select.py}} will just continue to run indefinitely until terminated.
> I've looked at a cluster at this state and can't evidence of any queries in flight or hung. It leads me to believe then that the bug lies in the test infrastructure, not Impala.
> The debug logs show this over and over:
> {noformat}
> 08:37:53 2845 140608723109632 DEBUG:concurrent_select[398]:Producer is alive: False
> 08:37:53 2845 140608723109632 DEBUG:concurrent_select[399]:Consumer is alive: False
> 08:37:53 2845 140608723109632 DEBUG:concurrent_select[400]:Queue size: 0
> 08:37:53 2845 140608723109632 DEBUG:concurrent_select[401]:Runners: 1
> {noformat}
> *Workaround:*
> Send {{SIGTERM}} to the hung child process.



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