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https://issues.apache.org/jira/browse/HDFS-15790?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vinayakumar B reassigned HDFS-15790:
------------------------------------

    Assignee: Vinayakumar B  (was: David Mollitor)

> Make ProtobufRpcEngineProtos and ProtobufRpcEngineProtos2 Co-Exist
> ------------------------------------------------------------------
>
>                 Key: HDFS-15790
>                 URL: https://issues.apache.org/jira/browse/HDFS-15790
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: David Mollitor
>            Assignee: Vinayakumar B
>            Priority: Critical
>              Labels: pull-request-available, release-blocker
>             Fix For: 3.3.1, 3.4.0
>
>          Time Spent: 4h 10m
>  Remaining Estimate: 0h
>
> Changing from Protobuf 2 to Protobuf 3 broke some stuff in Apache Hive 
> project.  This was not an awesome thing to do between minor versions in 
> regards to backwards compatibility for downstream projects.
> Additionally, these two frameworks are not drop-in replacements, they have 
> some differences.  Also, Protobuf 2 is not deprecated or anything so let us 
> have both protocols available at the same time.  In Hadoop 4.x Protobuf 2 
> support can be dropped.



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