Hi,
I am using hadoop-0.13.1 version. I am getting the following error
when the system running hadoop reboots.. It is not starting the data node.
Usually I face this problem when there is hadoop version mismatch or
during hadoop version upgrade.
The datanode log has this exception.
ERROR org.apache.hadoop.dfs.DataNode: java.io.IOException: Incompatible
namespaceIDs in /home/y/var/hadoop/dfs/data: namenode namespaceID =
1908070632; datanode namespaceID = 1485548870 at
org.apache.hadoop.dfs.DataStorage.doTransition(DataStorage.java:281) at
org.apache.hadoop.dfs.DataStorage.recoverTransitionRead(DataStorage.java:121)
at org.apache.hadoop.dfs.DataNode.startDataNode(DataNode.java:230) at
org.apache.hadoop.dfs.DataNode.<init>(DataNode.java:199) at
org.apache.hadoop.dfs.DataNode.makeInstance(DataNode.java:1202) at
org.apache.hadoop.dfs.DataNode.run(DataNode.java:1146) at
org.apache.hadoop.dfs.DataNode.createDataNode(DataNode.java:1167) at
org.apache.hadoop.dfs.DataNode.main(DataNode.java:1326)
Regards,
Karteek
