Plamen Jeliazkov updated HDFS-13331:
    Attachment: HDFS-13331-HDFS-12943.005.patch

> Add lastSeenStateId to RpcRequestHeader.
> ----------------------------------------
>                 Key: HDFS-13331
>                 URL: https://issues.apache.org/jira/browse/HDFS-13331
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>    Affects Versions: HDFS-12943
>            Reporter: Plamen Jeliazkov
>            Assignee: Plamen Jeliazkov
>            Priority: Major
>         Attachments: HDFS-13331-HDFS-12943.002.patch, 
> HDFS-13331-HDFS-12943.003..patch, HDFS-13331-HDFS-12943.004.patch, 
> HDFS-13331-HDFS-12943.005.patch, HDFS-13331.trunk.001.patch, 
> HDFS_13331.trunk.000.patch
> HDFS-12977 added a stateId into the RpcResponseHeader which is returned by 
> NameNode and stored by DFSClient.
> This JIRA is to followup on that work and have the DFSClient send their 
> stored "lastSeenStateId" in the RpcRequestHeader so that ObserverNodes can 
> then compare with their own and act accordingly.
> This JIRA work focuses on just the part of making DFSClient send their state 
> through RpcRequestHeader.

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