[HDFS-2781] Add client protocol and DFSadmin for command to restore failed storage

• Type: New Feature
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.0.0-alpha
• Component/s: hdfs-client, namenode
• Assignee: Brandon Li
• Reporter: Aaron Myers
• Created: 11/Jan/12 23:02
• Updated: 10/Mar/15 04:36

Description

Per HDFS-2769, it's important that an admin be able to ask the NN to try to restore failed storage since we may drop into SM until the shared edits dir is restored (w/o having to wait for the next checkpoint). There's currently an API (and usage in DFSAdmin) to flip the flag indicating whether the NN should try to restore failed storage but not that it should actually attempt to do so. This jira is to add one. This is useful outside HA but doing as an HDFS-1623 sub-task since it's motivated by HA.

Issue Links

• is related to: HDFS-2902 HA: Allow new (shared) edits log dir to be configured while NN is running