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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11209) SNN can't checkpoint when rolling upgrade is not finalized
Date Fri, 06 Jan 2017 19:36:58 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15805492#comment-15805492
] 

Junping Du commented on HDFS-11209:
-----------------------------------

No progress on this JIRA for a while. move to 2.9

> SNN can't checkpoint when rolling upgrade is not finalized
> ----------------------------------------------------------
>
>                 Key: HDFS-11209
>                 URL: https://issues.apache.org/jira/browse/HDFS-11209
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: rolling upgrades
>    Affects Versions: 2.8.0, 3.0.0-alpha1
>            Reporter: Xiaoyu Yao
>            Assignee: Xiaoyu Yao
>            Priority: Critical
>
> Similar problem has been fixed with HDFS-7185. Recent change in HDFS-8432 brings this
back. 
> With HDFS-8432, the primary NN will not update the VERSION file to the new version after
running with "rollingUpgrade" option until upgrade is finalized. This is to support more downgrade
use cases.
> However, the checkpoint on the SNN is incorrectly updating the VERSION file when the
rollingUpgrade is not finalized yet. As a result, the SNN checkpoint successfully but fail
to push it to the primary NN because its version is higher than the primary NN as shown below.
> {code}
> 2016-12-02 05:25:31,918 ERROR namenode.SecondaryNameNode (SecondaryNameNode.java:doWork(399))
- Exception in doCheckpoint
> org.apache.hadoop.hdfs.server.namenode.TransferFsImage$HttpPutFailedException: Image
uploading failed, status: 403, url: http://NN:50070/imagetransfer?txid=345404754&imageFile=IMAGE&File-Le...,
message: This namenode has storage info -60:221856466:1444080250181:clusterX but the secondary
expected -63:221856466:1444080250181:clusterX
> {code} 



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