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https://issues.apache.org/jira/browse/TEZ-3701?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16025157#comment-16025157
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Jonathan Eagles commented on TEZ-3701:
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Am looking at this today.
> UnorderedPartitionedKVWriter - issues with parallel Deflater usage,
> synchronousqueue in threadpool
> --------------------------------------------------------------------------------------------------
>
> Key: TEZ-3701
> URL: https://issues.apache.org/jira/browse/TEZ-3701
> Project: Apache Tez
> Issue Type: Bug
> Affects Versions: 0.9.0
> Reporter: Harish Jaiprakash
> Assignee: Rajesh Balamohan
> Priority: Blocker
> Attachments: TEZ-3701.2.patch, TEZ-3701.3.patch, TEZ-3701.4.patch,
> TEZ-3701.5.patch
>
>
> UnorderedPartitionedKVWriter add task to the executor, but does not wait for
> them to finish before starting the final merge. This can cause finalMerge to
> fail or write incorrect data.
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