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https://issues.apache.org/jira/browse/MAPREDUCE-6706?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15500791#comment-15500791
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Junping Du commented on MAPREDUCE-6706:
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Hi [~drankye] and [~asuresh], thanks for proposing the effort. I think we need
more discussions here before we moving ahead.
In my understanding, TaskUmbilicalProtocol is used only between AM and tasks
for updating the progress. There is no version compatible issue during cluster
upgrade because we already support MR library deploy over distributed cache so
MR (and TEZ also) job can keep exactly the same version for AM and all tasks
during cluster upgrade. Can you guys clarify what benefit we can achieve by
doing this effort?
In the mean time, I am not sure if Tez (or other apps)'s buit-in RPC protocol
are still using WritableRPCEngine or not. cc [~hitesh] and [~sseth] If so, I am
concern to completely remove WritableRPCEngine for the same reason proposed by
[[email protected]] at HADOOP-12579.
> Update TaskUmbilicalProtocol to use ProtobufRPCEngine
> -----------------------------------------------------
>
> Key: MAPREDUCE-6706
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6706
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Reporter: Arun Suresh
> Assignee: Wei Zhou
>
> Currently, {{TaskUmbilicalProtocol}} still uses {{WritableRPCEngine}}, which
> should be moved to {{ProtocolRPCEngine}} so that the former can be deprecated
> as tracked by HADOOP-12579
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