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https://issues.apache.org/jira/browse/FLINK-7316?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16119981#comment-16119981
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Nico Kruber commented on FLINK-7316:
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After changing to off-heap network buffers, we are hit by FLINK-7400 and thus
failing yarn cluster environments.
> always use off-heap network buffers
> -----------------------------------
>
> Key: FLINK-7316
> URL: https://issues.apache.org/jira/browse/FLINK-7316
> Project: Flink
> Issue Type: Sub-task
> Components: Core, Network
> Affects Versions: 1.4.0
> Reporter: Nico Kruber
> Assignee: Nico Kruber
>
> In order to send flink buffers through netty into the network, we need to
> make the buffers use off-heap memory. Otherwise, there will be a hidden copy
> happening in the NIO stack.
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