[HADOOP-5465] Blocks remain under-replicated

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.18.3
• Fix Version/s: 0.18.4, 0.19.2, 0.20.0
• Hadoop Flags: Reviewed
• Assignee: Hairong Kuang
• Reporter: Hairong Kuang
• Created: 11/Mar/09 23:03
• Updated: 08/Jul/09 16:43
• Resolved: 13/Mar/09 19:59

Description

Occasionally we see some blocks remain to be under-replicated in our production clusters. This is what we obeserved:
1. Sometimes when increasing the replication factor of a file, some blocks belonged to this file do not get to increase to the new replication factor.
2. When taking meta save in two different days, some blocks remain in under-replication queue.

Issue Links

• relates to: HADOOP-5479 NameNode should not send empty block replication request to DataNode