Suresh Srinivas created HDFS-3393:
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Summary: Rollback on newer release must not be allowed if the
layout version in the snapshot is for older release.
Key: HDFS-3393
URL: https://issues.apache.org/jira/browse/HDFS-3393
Project: Hadoop HDFS
Issue Type: Bug
Components: name-node
Affects Versions: 1.0.0, 2.0.0, 3.0.0
Reporter: Suresh Srinivas
After upgrading to a new release, the procedure to rollback to older release is
to start the namenode in older release with -rollback option.
As reported in HADOOP-8371, the rollback was allowed on the newer release.
During rollback, namenode must allow rollback only if the layout version of the
namenode matches that of the layout version in the snapshot that the namenode
is rolling back to.
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