If you move the NN dir, you also have to move its older location's
contents there before starting the NN.

On Thu, Feb 28, 2013 at 1:28 PM, Mohit Vadhera
<[EMAIL PROTECTED]> wrote:
> Hi Guys,
>
> Namenode switches into safemode when it has low disk space on the root fs /
> i have to manually run a command to leave it
> I have space on other partition. Can I change the path for cache files on
> other partition ? I have below properties . Can it resolve the issue ? If i
> change the path to other directories and restart services I get the below
> error while starting the service namenode. I didn't find anything in logs so
> far.  Can you please suggest something ?
>
>   <property>
>      <name>hadoop.tmp.dir</name>
>      <value>/var/lib/hadoop-hdfs/cache/${user.name}</value>
>   </property>
>   <property>
>      <name>dfs.namenode.name.dir</name>
>      <value>/var/lib/hadoop-hdfs/cache/${user.name}/dfs/name</value>
>   </property>
>   <property>
>      <name>dfs.namenode.checkpoint.dir</name>
>
> <value>/var/lib/hadoop-hdfs/cache/${user.name}/dfs/namesecondary</value>
>   </property>
>   <property>
>
>
> Service namenode is failing
>
> # for service in /etc/init.d/hadoop-hdfs-* ; do sudo $service status; done
> Hadoop datanode is running                                 [  OK  ]
> Hadoop namenode is dead and pid file exists                [FAILED]
> Hadoop secondarynamenode is running                        [  OK  ]
>
> Thanks,
>

--
Harsh J

Hi* *Mohit

 Your fsOwner hdfs should have the permission to access to the
/mnt/san1/hdfs/cache/hdfs/dfs/name.
So please check the permission  of  /mnt/  , and sub-directories on the OS.
they all need to be read ,writen.

regards
2013/2/28 Mohit Vadhera <[EMAIL PROTECTED]>

> Please find below logs for shutting down the namenode service. Can anybody
> check this
>
> 2013-02-28 02:07:51,752 WARN org.apache.hadoop.hdfs.server.common.Util:
> Path /mnt/san1/hdfs/cache/hdfs/dfs/name should be specified as a URI in
> configuration files. Please update hdfs configuration.
> 2013-02-28 02:07:51,754 WARN org.apache.hadoop.hdfs.server.common.Util:
> Path /mnt/san1/hdfs/cache/hdfs/dfs/name should be specified as a URI in
> configuration files. Please update hdfs configuration.
> 2013-02-28 02:07:51,754 WARN
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Only one image storage
> directory (dfs.namenode.name.dir) configured. Beware of dataloss due to
> lack of redundant storage directories!
> 2013-02-28 02:07:51,754 WARN
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Only one namespace
> edits storage directory (dfs.namenode.edits.dir) configured. Beware of
> dataloss due to lack of redundant storage directories!
> 2013-02-28 02:07:51,884 INFO org.apache.hadoop.util.HostsFileReader:
> Refreshing hosts (include/exclude) list
> 2013-02-28 02:07:51,890 INFO
> org.apache.hadoop.hdfs.server.blockmanagement.DatanodeManager:
> dfs.block.invalidate.limit=1000
> 2013-02-28 02:07:51,909 INFO
> org.apache.hadoop.hdfs.server.blockmanagement.BlockManager:
> dfs.block.access.token.enable=false
> 2013-02-28 02:07:51,910 INFO
> org.apache.hadoop.hdfs.server.blockmanagement.BlockManager:
> defaultReplication         = 1
> 2013-02-28 02:07:51,910 INFO
> org.apache.hadoop.hdfs.server.blockmanagement.BlockManager: maxReplication
>             = 512
> 2013-02-28 02:07:51,910 INFO
> org.apache.hadoop.hdfs.server.blockmanagement.BlockManager: minReplication
>             = 1
> 2013-02-28 02:07:51,910 INFO
> org.apache.hadoop.hdfs.server.blockmanagement.BlockManager:
> maxReplicationStreams      = 2
> 2013-02-28 02:07:51,910 INFO
> org.apache.hadoop.hdfs.server.blockmanagement.BlockManager:
> shouldCheckForEnoughRacks  = false
> 2013-02-28 02:07:51,910 INFO
> org.apache.hadoop.hdfs.server.blockmanagement.BlockManager:
> replicationRecheckInterval = 3000
> 2013-02-28 02:07:51,910 INFO
> org.apache.hadoop.hdfs.server.blockmanagement.BlockManager:
> encryptDataTransfer        = false
> 2013-02-28 02:07:51,920 INFO
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem: fsOwner             > hdfs (auth:SIMPLE)
> 2013-02-28 02:07:51,920 INFO
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem: supergroup          > hadmin
> 2013-02-28 02:07:51,920 INFO
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem: isPermissionEnabled > true
> 2013-02-28 02:07:51,920 INFO
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem: HA Enabled: false
> 2013-02-28 02:07:51,925 INFO
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Append Enabled: true
> 2013-02-28 02:07:52,462 INFO
> org.apache.hadoop.hdfs.server.namenode.NameNode: Caching file names
> occuring more than 10 times
> 2013-02-28 02:07:52,466 INFO
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem:
> dfs.namenode.safemode.threshold-pct = 0.9990000128746033
> 2013-02-28 02:07:52,467 INFO
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem:
> dfs.namenode.safemode.min.datanodes = 0
> 2013-02-28 02:07:52,467 INFO
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem:
> dfs.namenode.safemode.extension     = 0
> 2013-02-28 02:07:52,469 INFO org.apache.hadoop.hdfs.server.common.Storage:
> Storage directory /mnt/san1/hdfs/cache/hdfs/dfs/name does not exist.
> 2013-02-28 02:07:52,471 INFO
> org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Stopping NameNode
> metrics system...
> 2013-02-28 02:07:52,472 INFO
> org.apache.hadoop.metrics2.impl.MetricsSystemImpl: NameNode metrics system
> stopped.