[HDFS-1290] decommissioned nodes report not consistent / clear

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Not A Problem
• Affects Version/s: 0.20.1
• Component/s: namenode

Environment

fedora 12

• Assignee: Unassigned
• Reporter: Arun Ramakrishnan
• Created: 08/Jul/10 23:23
• Updated: 03/Apr/14 02:35
• Resolved: 03/Apr/14 02:35

Description

after i add the list of decom nodes to exclude list and -refreshNodes.
In the WebUI the decom/excluded nodes show up in both the live node list and the dead node list.

when I do -report from the command line.
"""
Datanodes available: 14 (20 total, 6 dead)
"""
The problem here is that is only 14 nodes total including the 6 added to the exclude list.

Now, in the node level status for each of the nodes, the excluded nodes say
""""
Decommission Status : Normal
""""
But, all the nodes say the same thing. I think if it said something like "in-progress", it would be more informative.
note. one thing distinguishing these excluded nodes is that they all report 0 or 100% for all the values in -report.

Cause, at this point i know from https://issues.apache.org/jira/browse/HDFS-1125 that one may have to restart the cluster to completely remove the nodes.
But, i have no clue when i should restart.

Ultimately, whats needed is some indication to when the decomission is complete so that all references to the excluded nodes ( from excludes, slaves ) and restart the cluster.

Issue Links

• is related to: HDFS-1125 Removing a datanode (failed or decommissioned) should not require a namenode restart
• relates to: HDFS-1125 Removing a datanode (failed or decommissioned) should not require a namenode restart