Did rolling upgrade from hadoop 2.5.2 to hadoop 2.7.2 and *did not finalize*
the upgrade. Now I wished to rollback to 2.5.2 version based on reference
Starting Name node 1 as active with *-rollingUpgrade rollback*, it gets
shuts down with the following exception,
version of storage directory ..\Metadata\data\dfs\namenode. Reported: -63.
Expecting = -57.*
There is already a task regarding this but the status is *Open*.
Please let me know are there any *work around *to rollback HDFS from
rolling upgrade without any issues.
Dinesh Kumar P