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https://issues.apache.org/jira/browse/HDFS-2060?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon resolved HDFS-2060.
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Resolution: Duplicate
This was fixed by other work to move RPC to protobuf
> DFS client RPCs using protobufs
> -------------------------------
>
> Key: HDFS-2060
> URL: https://issues.apache.org/jira/browse/HDFS-2060
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 0.23.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Attachments: hdfs-2060-getblocklocations.txt
>
>
> The most important place for wire-compatibility in DFS is between clients and
> the cluster, since lockstep upgrade is very difficult and a single client may
> want to talk to multiple server versions. So, I'd like to focus this JIRA on
> making the RPCs between the DFS client and the NN/DNs wire-compatible using
> protocol buffer based serialization.
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