What happened here is that you formatted the name node but have data left over from the previous incarnation of the namenode. The namenode can't deal with that situation.
On 12/19/07 11:25 PM, "M.Shiva" <[EMAIL PROTECTED]> wrote: > > /************************************************************ > STARTUP_MSG: Starting DataNode > STARTUP_MSG: host = slave/172.16.0.58 > STARTUP_MSG: args = [] > ************************************************************/ > 2007-12-20 12:38:35,507 INFO org.apache.hadoop.metrics.jvm.JvmMetrics: > Initializing JVM Metrics with processName=DataNode, sessionId=null > 2007-12-20 12:38:35,926 ERROR org.apache.hadoop.dfs.DataNode: > java.io.IOException: Incompatible namespaceIDs in > /home/hdusr/hadoop-hdusr/dfs/data: namenode namespaceID = 15620830; datanode > namespaceID = 307869798 > at org.apache.hadoop.dfs.DataStorage.doTransition(DataStorage.java:294) > at > org.apache.hadoop.dfs.DataStorage.recoverTransitionRead(DataStorage.java:138) > at org.apache.hadoop.dfs.DataNode.startDataNode(DataNode.java:243) > at org.apache.hadoop.dfs.DataNode.<init>(DataNode.java:206) > at org.apache.hadoop.dfs.DataNode.makeInstance(DataNode.java:1575) > at org.apache.hadoop.dfs.DataNode.run(DataNode.java:1519) > at org.apache.hadoop.dfs.DataNode.createDataNode(DataNode.java:1540) > at org.apache.hadoop.dfs.DataNode.main(DataNode.java:1711) > > 2007-12-20 12:38:35,928 INFO org.apache.hadoop.dfs.DataNode: SHUTDOWN_MSG: > /************************************************************ > SHUTDOWN_MSG: Shutting down DataNode at slave/172.16.0.58 > ************************************************************/ > IN SLAVE > > > > we get the error mentioned above in the slave node of multi-noded cluster > with 2 machines. How to resolve this issue. > > Kindly help out us > > -Shiva
