I think you should copy the namespaceID of your master which is in name/current/VERSION file to all the slaves Also use ./start-dfs.sh then ./start-mapred.sh to start respective daemons
http://hadoop-tutorial.blogspot.com/2010/11/running-hadoop-in-distributed-mode.html <http://hadoop-tutorial.blogspot.com/2010/11/running-hadoop-in-distributed-mode.html> *Regards*, Rahul Patodi Software Engineer, Impetus Infotech (India) Pvt Ltd, www.impetus.com Mob:09907074413 On Wed, Feb 9, 2011 at 11:48 AM, madhu phatak <phatak....@gmail.com> wrote: > 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 <ahmed_said_n...@hotmail.com > >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) > > > > -- > > View this message in context: > > http://old.nabble.com/Data-Nodes-do-not-start-tp30866323p30866323.html > > Sent from the Hadoop core-user mailing list archive at Nabble.com. > > > > > -- * *
