Hi For learning purposes, I am trying to set up my own hadoop/hdfs system at home. I am running openSuse 13 and Hadoop 2.5.1.
I followed the explanations in the "Singe Node Setup": http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/SingleCluster.html My problem is, the data node won't start: --> "Incompatible clusterIDs" How can I fix this? Thanks Roger 2014-10-02 20:48:31,022 FATAL org.apache.hadoop.hdfs.server.datanode.DataNode: Initialization failed for Block pool <registering> (Datanode Uuid unassigned) service to localhost/ 127.0.0.1:9000. Exiting. java.io.IOException: Incompatible clusterIDs in /tmp/hadoop-roger/dfs/data: namenode clusterID = CID-4146405c-72b8-404c-944d-58d5453ae939; datanode clusterID = CID-9280fd26-bee4-430c-8ea5-732a570047db at org.apache.hadoop.hdfs.server.datanode.DataStorage.doTransition(DataStorage.java:477) at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:226) at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:254) at org.apache.hadoop.hdfs.server.datanode.DataNode.initStorage(DataNode.java:975) at org.apache.hadoop.hdfs.server.datanode.DataNode.initBlockPool(DataNode.java:946) at org.apache.hadoop.hdfs.server.datanode.BPOfferService.verifyAndSetNamespaceInfo(BPOfferService.java:278) at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.connectToNNAndHandshake(BPServiceActor.java:220) at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:812) at java.lang.Thread.run(Thread.java:745)
