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https://issues.apache.org/jira/browse/SPARK-25055?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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DENG FEI resolved SPARK-25055.
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Resolution: Duplicate
> MessageWithHeader transfer ByteBuffer from Netty's CompositeByteBuf many times
> ------------------------------------------------------------------------------
>
> Key: SPARK-25055
> URL: https://issues.apache.org/jira/browse/SPARK-25055
> Project: Spark
> Issue Type: Bug
> Components: Block Manager
> Affects Versions: 2.3.1
> Reporter: DENG FEI
> Priority: Major
>
> MessageWithHeader transfer header and body if they are ByteBuf, in the case
> of fetch remote big block with greater than 'NIO_BUFFER_LIMIT', because of
> ChunkedByteBuffer#toNetty avoid consolidate, CompositeByteBuf.nioByteBuf will
> allocate from heap every times, lead to fetch timeout.
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