[HDFS-1218] 20 append: Blocks recovered on startup should be treated with lower priority during block synchronization

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.20-append
• Fix Version/s: 0.20.205.0
• Component/s: datanode
• Hadoop Flags: Reviewed
• Assignee: Todd Lipcon
• Reporter: Todd Lipcon
• Created: 16/Jun/10 21:56
• Updated: 29/Mar/12 09:12
• Resolved: 03/Oct/11 21:52

Description

When a datanode experiences power loss, it can come back up with truncated replicas (due to local FS journal replay). Those replicas should not be allowed to truncate the block during block synchronization if there are other replicas from DNs that have not restarted.

Issue Links

• relates to: HDFS-3161 20 Append: Excluded DN replica from recovery should be removed from DN.