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https://issues.apache.org/jira/browse/HADOOP-7557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13120370#comment-13120370
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Sanjay Radia commented on HADOOP-7557:
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* One can define interoperable well-specified standards in several ways
including using PB.
* Interoperable well-specified standards have to be defined not just for the
connection header but for the HDFS and MR protocols. I am sure you are not
suggesting that we drop the use of tools like PB and Avro completely at all
layers.
* Given that we are going to use PB/Avro at upper layers, we don't want to make
a special case for the connection header. PB makes it easy to extend the
headers. Yes I know we can do this manually but this is much easier with PB.
Indeed one can argue that all of what PB and Avro do can be manually done and
have been manually done in various protocols for the last 30 years.
> Make IPC and RPC headers be extensible
> ---------------------------------------
>
> Key: HADOOP-7557
> URL: https://issues.apache.org/jira/browse/HADOOP-7557
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Sanjay Radia
> Assignee: Sanjay Radia
> Attachments: IpcHeader.proto
>
>
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