Hi guys ! This is very strange - I have formatted my namenode (psuedo distributed mode) and now Im getting some kind of namespace error.
Without further ado : here is the interesting output of my logs . Last login: Fri Mar 30 19:29:12 on ttys009 doolittle-5:~ Jpeerindex$ doolittle-5:~ Jpeerindex$ doolittle-5:~ Jpeerindex$ cat Development/hadoop-0.20.203.0/logs/* 2012-03-30 22:28:31,640 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: STARTUP_MSG: /************************************************************ STARTUP_MSG: Starting DataNode STARTUP_MSG: host = doolittle-5.local/192.168.3.78 STARTUP_MSG: args = [] STARTUP_MSG: version = 0.20.203.0 STARTUP_MSG: build = http://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20-security-203-r 1099333; compiled by 'oom' on Wed May 4 07:57:50 PDT 2011 ************************************************************/ 2012-03-30 22:28:32,138 INFO org.apache.hadoop.metrics2.impl.MetricsConfig: loaded properties from hadoop-metrics2.properties 2012-03-30 22:28:32,190 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source MetricsSystem,sub=Stats registered. 2012-03-30 22:28:32,191 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled snapshot period at 10 second(s). 2012-03-30 22:28:32,191 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: DataNode metrics system started 2012-03-30 22:28:32,923 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source ugi registered. 2012-03-30 22:28:32,959 WARN org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Source name ugi already exists! 2012-03-30 22:28:34,478 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:9000. Already tried 0 time(s). 2012-03-30 22:28:36,317 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: java.io.IOException: Incompatible namespaceIDs in /private/tmp/hadoop-Jpeerindex/dfs/data: namenode namespaceID = 1829914379; datanode namespaceID = 1725952472 at org.apache.hadoop.hdfs.server.datanode.DataStorage.doTransition(DataStorage.java:232) at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:147) at org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:354) at org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:268) at org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1480) at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1419) at org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1437) at org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain(DataNode.java:1563) at org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1573)
