did you run the command bin/hadoop namenode -format before starting the namenode ?
On Fri, Aug 24, 2012 at 12:58 PM, Abhay Ratnaparkhi <abhay.ratnapar...@gmail.com> wrote: > Hello, > > I had a running hadoop cluster. > I restarted it and after that namenode is unable to start. I am getting > error saying that it's not formatted. :( > Is it possible to recover the data on HDFS? > > 2012-08-24 03:17:55,378 ERROR > org.apache.hadoop.hdfs.server.namenode.FSNamesystem: FSNamesystem > initialization failed. > java.io.IOException: NameNode is not formatted. > at > org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:434) > at > org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:110) > at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:291) > at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:270) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:271) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:303) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:433) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:421) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1359) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1368) > 2012-08-24 03:17:55,380 ERROR > org.apache.hadoop.hdfs.server.namenode.NameNode: java.io.IOException: > NameNode is not formatted. > at > org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:434) > at > org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:110) > at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:291) > at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:270) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:271) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:303) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:433) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:421) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1359) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1368) > > Regards, > Abhay > > -- Nitin Pawar
