Sergey Shelukhin commented on HIVE-19597:

The trigger thing just runs on timer, and therefore happens last after the test 
itself is probably already stuck...  appears to be a red herring.

> TestWorkloadManager sometimes hangs
> -----------------------------------
>                 Key: HIVE-19597
>                 URL: https://issues.apache.org/jira/browse/HIVE-19597
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>            Priority: Major
> Seems like the tests randomly get stuck after the lines like
> {noformat}
> 2018-05-17T01:54:27,111  INFO [Workload management master] 
> tez.WorkloadManager: Processing current events
> 2018-05-17T01:54:27,603  INFO [TriggerValidator] 
> tez.PerPoolTriggerValidatorRunnable: Creating trigger validator for pool: llap
> 2018-05-17T01:54:37,090 DEBUG [Thread-28] conf.HiveConf: Found metastore URI 
> of null
> {noformat}
> Then they get killed by timeout. Happened in the same manner, to random tests 
> in a few separate runs.

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