All sometimes when I startup my hadoop I get the following error? 12/02/17 10:29:56 INFO namenode.NameNode: STARTUP_MSG: /************************************************************ STARTUP_MSG: Starting NameNode STARTUP_MSG: host =iMac.local/192.168.0.191 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 ************************************************************/ 12/02/17 10:29:56 WARN impl.MetricsSystemImpl: Metrics system not started: Cannot locate configuration: tried hadoop-metrics2-namenode.properties, hadoop-metrics2.properties 2012-02-17 10:29:56.994 java[4065:1903] Unable to load realm info from SCDynamicStore 12/02/17 10:29:57 INFO util.GSet: VM type = 64-bit 12/02/17 10:29:57 INFO util.GSet: 2% max memory = 17.77875 MB 12/02/17 10:29:57 INFO util.GSet: capacity = 2^21 = 2097152 entries 12/02/17 10:29:57 INFO util.GSet: recommended=2097152, actual=2097152 12/02/17 10:29:57 INFO namenode.FSNamesystem: fsOwner=scottsue 12/02/17 10:29:57 INFO namenode.FSNamesystem: supergroup=supergroup 12/02/17 10:29:57 INFO namenode.FSNamesystem: isPermissionEnabled=true 12/02/17 10:29:57 INFO namenode.FSNamesystem: dfs.block.invalidate.limit=100 12/02/17 10:29:57 INFO namenode.FSNamesystem: isAccessTokenEnabled=false accessKeyUpdateInterval=0 min(s), accessTokenLifetime=0 min(s) 12/02/17 10:29:57 INFO namenode.FSNamesystem: Registered FSNamesystemStateMBean and NameNodeMXBean 12/02/17 10:29:57 INFO namenode.NameNode: Caching file names occuring more than 10 times 12/02/17 10:29:57 INFO common.Storage: Number of files = 190 12/02/17 10:29:57 INFO common.Storage: Number of files under construction = 0 12/02/17 10:29:57 INFO common.Storage: Image file of size 26377 loaded in 0 seconds. 12/02/17 10:29:57 ERROR namenode.NameNode: java.lang.NullPointerException at org.apache.hadoop.hdfs.server.namenode.FSDirectory.addChild(FSDirectory.java:1113) at org.apache.hadoop.hdfs.server.namenode.FSDirectory.addChild(FSDirectory.java:1125) at org.apache.hadoop.hdfs.server.namenode.FSDirectory.addNode(FSDirectory.java:1028) at org.apache.hadoop.hdfs.server.namenode.FSDirectory.unprotectedAddFile(FSDirectory.java:205) at org.apache.hadoop.hdfs.server.namenode.FSEditLog.loadFSEdits(FSEditLog.java:613) at org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSEdits(FSImage.java:1009) at org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:827) at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:365) at org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:97) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:379) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:353) at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:254) at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:434) at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1153) at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1162)
12/02/17 10:29:57 INFO namenode.NameNode: SHUTDOWN_MSG: /************************************************************ SHUTDOWN_MSG: Shutting down NameNode at iMac.local/192.168.0.191 ************************************************************/
