Jing Zhao created HDFS-5794:
-------------------------------
Summary: 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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