[HDFS-6985] Add final keywords, documentation, etc. to ReplaceDatanodeOnFailure

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Assignee: Colin McCabe
• Reporter: Colin McCabe
• Created: 02/Sep/14 22:20
• Updated: 02/Sep/14 22:46

Description

• use final qualifier and variable names consistently in ReplaceDatanodeOnFailure#Condition classes

• add a debug log message in the DFSClient explaining which pipeline failure policy is being used.

• add JavaDoc for ReplaceDatanodeOnFailure

• documentation dfs.client.block.write.replace-datanode-on-failure.best-effort should make it clear that that the configuration key refers to pipeline recovery.

Issue Links

• relates to: HDFS-4257 The ReplaceDatanodeOnFailure policies could have a forgiving option