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MapReduce >> mail # user >> name node can't startup


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name node can't startup
hello,

I encountered a problem of hadoop 1.02. At begining, the second name node
exited and can't start,it reports error like below:

2012-12-17 17:09:05,646 ERROR
org.apache.hadoop.hdfs.server.namenode.NameNode:
java.lang.NullPointerException
        at
org.apache.hadoop.hdfs.server.namenode.FSDirectory.addChild(FSDirectory.java:1094)
        at
org.apache.hadoop.hdfs.server.namenode.FSDirectory.addChild(FSDirectory.java:1106)
        at
org.apache.hadoop.hdfs.server.namenode.FSDirectory.addNode(FSDirectory.java:1009)
        at
org.apache.hadoop.hdfs.server.namenode.FSDirectory.unprotectedAddFile(FSDirectory.java:208)
        at
org.apache.hadoop.hdfs.server.namenode.FSEditLog.loadFSEdits(FSEditLog.java:626)
        at
org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSEdits(FSImage.java:1015)
        at
org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:833)
        at
org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:372)
        at
org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:100)
        at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:388)
        at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:362)
        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)

then, i shut down all process,but the name node also can't start up, and
reported the same error.
I consider the edits or edits.new may be corrupted, any one could give me
some advice?
including how to repair edits manually?

Thanks!

Andy zhou
+
Mohammad Tariq 2012-12-17, 14:01
+
周梦想 2012-12-17, 18:16
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB