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https://issues.apache.org/jira/browse/HDFS-13331?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16422986#comment-16422986
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Plamen Jeliazkov commented on HDFS-13331:
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On second thought I decided to implement (1) anyway and make use of
{{LogCapturer}}. My justification is that we can address any concerns in the
follow-up work anyway; and it's possible we keep the log statement but maybe
just change its structure once further server implementations are done.
I have attached a new patch addressing your points.
> 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.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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