[HADOOP-1070] Number of racks and datanode double temporarily when upgrading from 0.10.1 to 0.11.2

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.11.2
• Fix Version/s: 0.12.1
• Assignee: Konstantin Shvachko
• Reporter: Nigel Daley
• Created: 06/Mar/07 18:40
• Updated: 08/Jul/09 16:41
• Resolved: 13/Mar/07 21:05

Description

When upgrading from Hadoop 0.10.1 to 0.11.2, I see the number of racks and datanode double after the 2nd startup of the Namenode. After the 3rd startup, they correct themselves:

Namenode Log After 1st Startup:
2007-03-06 18:27:27,045 INFO org.apache.hadoop.dfs.StateChange: STATE* Network topology has 1 racks and 4 datanodes

Namenode Log After 2nd Startup:
2007-03-06 18:27:43,201 INFO org.apache.hadoop.dfs.StateChange: STATE* Network topology has 2 racks and 8 datanodes

Namenode Log After 3rd Startup:
2007-03-06 18:28:09,730 INFO org.apache.hadoop.dfs.StateChange: STATE* Network topology has 1 racks and 4 datanodes