[HDFS-2913] Add graceful shutdown command for the NN

• Type: New Feature
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: namenode
• Assignee: Bikas Saha
• Reporter: Bikas Saha
• Created: 07/Feb/12 23:50
• Updated: 16/Feb/12 22:23

Description

Ideally, NameNode.stop() needs to be called because it will change the HA state and shutdown all services. NameNode reference is not available anywhere. Hence it is not possible to shutdown the name node gracefully.

A possible solution could be to have a Service interface that gets passed down to components like FSNameSystem, via which they can inform the NameNode about irrecoverable errors. NameNode could then decide to shutdown.

Issue Links

• is related to: HDFS-2912 HA: Namenode not shutting down when shared edits dir is inaccessible