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From "Tsz Wo Nicholas Sze (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7340) make rollingUpgrade start/finalize idempotent
Date Tue, 04 Nov 2014 16:58:34 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7340?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14196355#comment-14196355
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Tsz Wo Nicholas Sze commented on HDFS-7340:
-------------------------------------------

+1 patch looks good.  No additional comments.

> make rollingUpgrade start/finalize idempotent
> ---------------------------------------------
>
>                 Key: HDFS-7340
>                 URL: https://issues.apache.org/jira/browse/HDFS-7340
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: ha
>    Affects Versions: 2.4.0
>            Reporter: Arpit Gupta
>            Assignee: Jing Zhao
>         Attachments: HDFS-7340.000.patch
>
>
> I was running this on a HA cluster with dfs.client.test.drop.namenode.response.number
set to 1. So the first request goes through but the response is dropped. Which then causes
another request which fails and says a request is already in progress. We should add retry
cache support for this.



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