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https://issues.apache.org/jira/browse/SPARK-4671?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14229547#comment-14229547
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Apache Spark commented on SPARK-4671:
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User 'jerryshao' has created a pull request for this issue:
https://github.com/apache/spark/pull/3534
> Streaming block need not to replicate 2 copies when WAL is enabled
> ------------------------------------------------------------------
>
> Key: SPARK-4671
> URL: https://issues.apache.org/jira/browse/SPARK-4671
> Project: Spark
> Issue Type: Bug
> Components: Streaming
> Affects Versions: 1.2.0
> Reporter: Saisai Shao
>
> Generated streaming blocks should not be replicated to another node when WAL
> is enabled, since WAL is already fault tolerant, this will hurt the
> throughput of streaming application.
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