Tanping, Thank you for the reply. The nodes were marked as ³decommissioning in progress.² My concern was that they never reached a decommissioned state. I have since begun taking the nodes down and have not have any data blocks missing, so I suspect the process worked. It was just unclear when the process was complete.
James On 2/17/11 12:59 PM, "Tanping Wang" <tanp...@yahoo-inc.com> wrote: > James, > After issuing a command to decommission a node, you should at least be able to > see the following log messages in the namenode logs > > Setting the excludes files to some_file_contains_decommissioing_hostname > Refreshing hosts (include/exclude) list > > If you do not see these log messages, maybe you want to check > 1) Weather you have set > > <property> > > <name>dfs.hosts.exclude</name> > > <value>some_file_contains_decommissioing_hostname</value> > > </property> > > In hdfs-site.xml > 2) If you have your this decommissioning hostname file in place. > > Regards, > Tanping > > From: James Litton [mailto:james.lit...@chacha.com] > Sent: Friday, February 11, 2011 1:10 PM > To: hdfs-user@hadoop.apache.org > Subject: Decommissioning Nodes > > While decommissioning nodes I am seeing the following in my namenode logs: > 2011-02-11 21:05:16,290 WARN > org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Not able to place enough > replicas, still in need of 5 > > I haven¹t seen any progress of decommissioning nodes in several days. I have > 12 total nodes with 6 being decommissioned and a replication factor of 3. How > long should I expect this to take? Is there a way to force this to move > forward? > > Thank you. >
