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https://issues.apache.org/jira/browse/SPARK-13796?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15189919#comment-15189919
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Nishkam Ravi commented on SPARK-13796:
--------------------------------------

Hey [~srowen] this doesn't seem to impact functionality. I checked with Josh 
offline and we decided to open a JIRA anyways. Can be reproduced with 
SparkPageRank example among others. If we conclude this isn't a real problem, 
the error message could be redirected to logWarning.

> Lock release errors occur frequently in executor logs
> -----------------------------------------------------
>
>                 Key: SPARK-13796
>                 URL: https://issues.apache.org/jira/browse/SPARK-13796
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>    Affects Versions: 2.0.0
>            Reporter: Nishkam Ravi
>            Priority: Minor
>
> Executor logs contain a lot of these error messages (irrespective of the 
> workload):
> 16/03/08 17:53:07 ERROR executor.Executor: 1 block locks were not released by 
> TID = 1119



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