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Re: Data Nodes do not start
Don't use start-all.sh ,use data node daemon script to start the data node .

On Mon, Feb 7, 2011 at 11:52 PM, ahmednagy <[EMAIL PROTECTED]>wrote:

>
> Dear All,
> Please Help. I have tried to start the data nodes with ./start-all.sh on a
> 7
> node cluster however I recieve incompatible namespace when i try to put any
> file on the HDFS I tried the suggestions in the known issues for changing
> the VERSION number in the hdfs however it did not work. any ideas Please
> advise. I am attaching the error in the log file for data node
> Regards
>
>
> https://issues.apache.org/jira/browse/HDFS-107
>
>
> 2011-02-07 18:52:28,691 INFO
> org.apache.hadoop.hdfs.server.datanode.DataNode: STARTUP_MSG:
> /************************************************************
> STARTUP_MSG: Starting DataNode
> STARTUP_MSG:   host = n01/192.168.0.1
> STARTUP_MSG:   args = []
> STARTUP_MSG:   version = 0.21.0
> STARTUP_MSG:   classpath >
> /home/ahmednagy/HadoopStandalone/hadoop-0.21.0/bin/../conf:/usr/lib/jvm/java-6-sun/lib/tools.jar:/home/ahmednagy/HadoopStandalone$
> STARTUP_MSG:   build > https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.21 -r
> 985326; compiled by 'tomwhite' on Tue Aug 17 01:02:28 EDT 2010
> ************************************************************/
> 2011-02-07 18:52:28,881 WARN org.apache.hadoop.hdfs.server.common.Util:
> Path
> /tmp/mylocal/ should be specified as a URI in configuration files. Please
> updat$
> 2011-02-07 18:52:29,115 INFO org.apache.hadoop.security.Groups: Group
> mapping impl=org.apache.hadoop.security.ShellBasedUnixGroupsMapping;
> cacheTimeout=3000$
> 2011-02-07 18:52:29,580 ERROR
> org.apache.hadoop.hdfs.server.datanode.DataNode: java.io.IOException:
> Incompatible namespaceIDs in /tmp/mylocal: namenode name$
>        at
>
> org.apache.hadoop.hdfs.server.datanode.DataStorage.doTransition(DataStorage.java:237)
>        at
>
> org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:152)
>        at
>
> org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:336)
>        at
> org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:260)
>        at
> org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:237)
>        at
>
> org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1440)
>        at
>
> org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1393)
>        at
>
> org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1407)
>        at
> org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1552)
>
> --
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>
>