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https://issues.apache.org/jira/browse/HDFS-5794?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jing Zhao updated HDFS-5794:
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Status: Patch Available (was: Open)
> Fix the inconsistency of layout version number of
> ADD_DATANODE_AND_STORAGE_UUIDS between trunk and branch-2
> -----------------------------------------------------------------------------------------------------------
>
> Key: HDFS-5794
> URL: https://issues.apache.org/jira/browse/HDFS-5794
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 3.0.0, 2.4.0
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Attachments: HDFS-5794.000.patch
>
>
> Currently in trunk, we have the layout version:
> {code}
> EDITLOG_ADD_BLOCK(-48, ...),
> CACHING(-49, ...),
> ADD_DATANODE_AND_STORAGE_UUIDS(-50, ...);
> {code}
> And in branch-2, we have:
> {code}
> EDITLOG_SUPPORT_RETRYCACHE(-47, ...),
> ADD_DATANODE_AND_STORAGE_UUIDS(-49, -47, ...);
> {code}
> We plan to backport HDFS-5704 and HDFS-5777 to branch-2, thus
> EDITLOG_ADD_BLOCK will also take -48 in branch-2. However, we cannot change
> ADD_DATANODE_AND_STORAGE_UUIDS to -50 in branch-2. Otherwise fsimages written
> by trunk and branch-2 have the same layout -50 but branch-2 cannot read the
> -50 fsimage if it is written by trunk.
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