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https://issues.apache.org/jira/browse/HADOOP-7773?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13136185#comment-13136185
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Suresh Srinivas commented on HADOOP-7773:
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I tested it by moving JournalProtocol in HDFS to protobuf and testing it.
Unfortunately I had to hack a lot of things in HDFS to have two RPC servers one
for writable and one for protobuf (currently both protocols cannot be supported
by the same RPC server, since an RPC engine is chosen as Writable or Protobuf
but not both).
Writing test means, having a test.proto etc. Thought I can avoid that work,
since HDFS will move to protobuf and this gets tested as a part of that. If we
still feel it is worth having tests, I will put in that time.
> Add support for protocol buffer based RPC engine
> ------------------------------------------------
>
> Key: HADOOP-7773
> URL: https://issues.apache.org/jira/browse/HADOOP-7773
> Project: Hadoop Common
> Issue Type: Improvement
> Components: ipc
> Affects Versions: 0.23.0, 0.24.0
> Reporter: Suresh Srinivas
> Assignee: Suresh Srinivas
> Attachments: HADOOP-7773.txt
>
>
> This jira adds support for protocol buffer RPC engine.
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