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https://issues.apache.org/jira/browse/PIG-3978?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14015723#comment-14015723
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Daniel Dai commented on PIG-3978:
---------------------------------
RB link: https://reviews.apache.org/r/22155/
> Container reuse does not across PigServer
> -----------------------------------------
>
> Key: PIG-3978
> URL: https://issues.apache.org/jira/browse/PIG-3978
> Project: Pig
> Issue Type: Bug
> Components: tez
> Reporter: Daniel Dai
> Assignee: Daniel Dai
> Fix For: 0.14.0
>
> Attachments: PIG-3978-1.patch
>
>
> Container reuse across PigServer does not happen in current code. We use
> different TezResourceManager per PigServer, and different TezResourceManager
> will upload LocalResource to different staging directory, so LocalResource is
> different for different PigServer, thus no container reuse across PigServer.
> This will affect Pig embedding where multiple PigServer is used for a Pig
> script.
> The issue is partly due to PIG-3785 which we switch TezResourceManager to
> non-singleton. The root cause for PIG-3785 is not the singleton issue. The
> real issue is TezResourceManager.addTezResource is not synchronized, there is
> a race condition when one PigServer already upload the resource and use it in
> container, and the other PigServer overwrite at the same time.
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