[HDFS-5968] Fix rollback of rolling upgrade in NameNode HA setup

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Component/s: datanode, ha, hdfs-client, namenode
• Assignee: Jing Zhao
• Reporter: Jing Zhao
• Created: 19/Feb/14 00:36
• Updated: 19/Feb/14 00:49
• Resolved: 19/Feb/14 00:49

Description

This jira does the following:
1. When do rollback for rolling upgrade, we should call FSEditLog#initJournalsForWrite when initializing editLog (just like Upgrade in HA setup).
2. After the rollback, we also need to rename the md5 file and change its reference file name.
3. Add a new unit test to cover rollback with HA+QJM

Issue Links

• duplicates: HDFS-5966 Fix rollback of rolling upgrade in NameNode HA setup