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https://issues.apache.org/jira/browse/HADOOP-6949?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12908591#action_12908591
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Navis commented on HADOOP-6949:
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You're right. It's just an mere aesthetic mod, but a real improvement.
It was the smallest part of in-house NN-HA implementaion. For DN having couple
of million blocks, it reduced block reporting time from 21sec --> 17 sec.
I'll resolve this issue as a 'Not-A-Problem'. Thanks for your comment.
> Reduces RPC packet size for primitive arrays, especially long[], which is
> used at block reporting
> -------------------------------------------------------------------------------------------------
>
> Key: HADOOP-6949
> URL: https://issues.apache.org/jira/browse/HADOOP-6949
> Project: Hadoop Common
> Issue Type: Improvement
> Components: io
> Reporter: Navis
> Priority: Trivial
> Attachments: ObjectWritable.diff
>
> Original Estimate: 0.17h
> Remaining Estimate: 0.17h
>
> Current implementation of oah.io.ObjectWritable marshals primitive array
> types as general object array ; array type string + array length + (element
> type string + value)*n
> It would not be needed to specify each element types for primitive arrays.
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