[HDFS-606] ConcurrentModificationException in invalidateCorruptReplicas()

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.20-append, 0.20.205.0, 0.21.0
• Fix Version/s: 0.20-append, 0.20.205.0, 0.21.0
• Component/s: namenode
• Hadoop Flags: Reviewed
• Assignee: Konstantin Shvachko
• Reporter: Konstantin Shvachko
• Created: 09/Sep/09 02:58
• Updated: 02/May/13 02:29
• Resolved: 08/Dec/09 18:52

Description

BlockManager.invalidateCorruptReplicas() iterates over DatanodeDescriptor-s while removing corrupt replicas from the descriptors. This causes ConcurrentModificationException if there is more than one replicas of the block. I ran into this exception debugging different scenarios in append, but it should be fixed in the trunk too.

Issue Links

• is depended upon by: HDFS-142 In 0.20, move blocks being written into a blocksBeingWritten directory