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From "Plamen Jeliazkov (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HDFS-13331) Add lastSeenStateId to RpcRequestHeader.
Date Thu, 29 Mar 2018 20:27:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-13331?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16419704#comment-16419704
] 

Plamen Jeliazkov edited comment on HDFS-13331 at 3/29/18 8:26 PM:
------------------------------------------------------------------

Hi [~xkrogen], yes, you are correct. I brought up that concern in the last patch as well stating
that I was not happy with the use of a static method in Client as a way to handle alignmentContext,
but it seems that point was glossed over.

I mentioned this:
https://issues.apache.org/jira/browse/HDFS-12977?focusedCommentId=16372125&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16372125
And here:
https://issues.apache.org/jira/browse/HDFS-12977?focusedCommentId=16386960&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16386960

My issue was that I had difficulty finding a way to pass in alignmentContext into Client constructor.
I am happy to try again though.


was (Author: zero45):
Yes you are correct. I brought up that concern in the last patch as well stating that I was
not happy with the use of a static method in Client as a way to handle alignmentContext, but
it seems that point was glossed over.

I mentioned this:
https://issues.apache.org/jira/browse/HDFS-12977?focusedCommentId=16372125&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16372125
And here:
https://issues.apache.org/jira/browse/HDFS-12977?focusedCommentId=16386960&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16386960

My issue was that I had difficulty finding a way to pass in alignmentContext into Client constructor.
I am happy to try again though.

> 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.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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