[HDFS-8226] Non-HA rollback compatibility broken

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 2.4.0
• Fix Version/s: 2.8.0, 2.7.1, 3.0.0-alpha1
• Hadoop Flags: Incompatible change, Reviewed
• Release Note: Non-HA rollback steps have been changed. Run the rollback command on the namenode (`bin/hdfs namenode -rollback`) before starting cluster with '-rollback' option using (sbin/start-dfs.sh -rollback).
• Assignee: J.Andreina
• Reporter: J.Andreina
• Created: 23/Apr/15 05:07
• Updated: 05/Jan/17 22:39
• Resolved: 08/May/15 10:16

Description

In HA while performing rollback , we use “hdfs namenode –rollback” which would prompt user for confirmation. ( Implemented as part of HDFS-5138)

For Non-HA , as per doc if we perform rollback using “start-dfs.sh –rollback” , then namenode startup hangs ( As it tries to start namenode in daemon mode , hence will not be able to prompt user for confirmation )