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https://issues.apache.org/jira/browse/TEZ-3738?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16226188#comment-16226188
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Rajesh Balamohan commented on TEZ-3738:
---------------------------------------

I do not think it is due to recent changes. But it is quite possible that it 
was flaky and is surfacing now. I haven't been able to reproduce this so far on 
my environment.

{{availableSlots}} was added mainly to restrict too many submissions to the 
threadpool. However, as per the log it appears that already 2 threads were 
already in running state, when the semaphore was acquired in {{scheduleSpill}}. 
I will try to reproduce this in my test env.

> TestUnorderedPartitionedKVWriter fails due to RejectedExecutionException
> ------------------------------------------------------------------------
>
>                 Key: TEZ-3738
>                 URL: https://issues.apache.org/jira/browse/TEZ-3738
>             Project: Apache Tez
>          Issue Type: Bug
>            Reporter: Jason Lowe
>
> TestUnorderedPartitionedKVWriter is failing in recent precommit builds.  
> Stacktrace to follow.



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