[HDFS-3958] Integrate upgrade/finalize/rollback with external journals

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 3.0.0-alpha1
• Component/s: namenode
• Assignee: Unassigned
• Reporter: Todd Lipcon
• Created: 19/Sep/12 05:02
• Updated: 12/May/16 18:13
• Resolved: 02/Oct/13 22:14

Description

Currently the NameNode upgrade/rollback/finalize framework only supports local storage. With edits being stored in pluggable Journals, this could create certain difficulties - in particular, rollback wouldn't actually rollback the external storage to the old state.

We should look at how to expose the right hooks to the external journal storage to snapshot/rollback/finalize.

Issue Links

• is duplicated by: HDFS-5138 Support HDFS upgrade in HA