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.
