[HDFS-7934] Update RollingUpgrade rollback documentation: should use bootstrapstandby for standby NN

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.4.0
• Fix Version/s: 2.8.0, 2.7.1, 3.0.0-alpha1
• Component/s: documentation
• Hadoop Flags: Reviewed
• Assignee: J.Andreina Assign to me
• Reporter: J.Andreina
• Created: 16/Mar/15 07:01
• Updated: 06/Jan/17 00:44
• Resolved: 15/Apr/15 20:21

Description

During Rolling upgrade rollback , standby namenode startup fails , while loading edits and when there is no local copy of edits created after upgrade ( which is already been removed by Active Namenode from journal manager and from Active's local).