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https://issues.apache.org/jira/browse/HDFS-11010?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15596678#comment-15596678
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Andrew Wang commented on HDFS-11010:
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bq. I am expecting that our clients will have to move to using new DFSclient
since we have broken so many of those classes already.
[~anu] could you give me some pointers to these breakages between Hadoop 2 and
3? I diffed the .proto files before alpha1, and only saw one issue (which we
fixed, and wasn't client-side). If there are incompatible wire changes, it's at
the very least worth re-examining them.
> Update to Protobuf 3 in trunk
> -----------------------------
>
> Key: HDFS-11010
> URL: https://issues.apache.org/jira/browse/HDFS-11010
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: ipc
> Affects Versions: 3.0.0-alpha2
> Reporter: Anu Engineer
>
> This JIRA is to propose that we should move to protobuf 3 from protobuf 2.5.
> This allows us to stay with the newer versions of the protobuf.
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