i start hadoop and have error:
2012-04-09 19:06:57,971 ERROR
org.apache.hadoop.hdfs.server.namenode.NameNode:
java.lang.NullPointerException
at
org.apache.hadoop.hdfs.server.namenode.FSDirectory.addChild(FSDirectory.java:1091)
at
org.apache.hadoop.hdfs.server.namenode.FSDirectory.addChild(FSDirectory.java:1103)
at
org.apache.hadoop.hdfs.server.namenode.FSDirectory.addNode(FSDirectory.java:1006)
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:1013)
at
org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:826)
at
org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:362)
at
org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:97)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:386)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:360)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:276)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:496)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1279)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1288)
i have backup secoundarynamenode at master and one slave.
thank.
