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From "Jing Zhao (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-5794) Fix the inconsistency of layout version number of ADD_DATANODE_AND_STORAGE_UUIDS between trunk and branch-2
Date Thu, 16 Jan 2014 23:09:23 GMT

     [ https://issues.apache.org/jira/browse/HDFS-5794?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jing Zhao updated HDFS-5794:
----------------------------

    Description: 
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.

  was:
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.


> 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
>
> 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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