On Mon, Aug 3, 2009 at 12:08 PM, bharath vissapragada < [email protected]> wrote:
> Hi all , > > I have noticed some problem in my cluster when i changed the hadoop version > on the same DFS directory .. The namenode log on the master says the > following .. > > > ile system image contains an old layout version -16. > *An upgrade to version -18 is required. > Please restart NameNode with -upgrade option. > * See bolded text above -- you need to run namenode -upgrade to upgrade your metadata format to the current version. -Todd at > > > org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:312) > at > > org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:87) > at > > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:309) > at > > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:288) > at > > org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:163) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:208) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:194) > at > > org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:859) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:868) > 2009-08-04 00:27:51,498 INFO org.apache.hadoop.ipc.Server: Stopping server > on 54310 > 2009-08-04 00:27:51,498 ERROR > org.apache.hadoop.hdfs.server.namenode.NameNode: java.io.IOException: > File system image contains an old layout version -16. > An upgrade to version -18 is required. > Please restart NameNode with -upgrade option. > at > > org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:312) > at > > org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:87) > at > > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:309) > at > > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:288) > at > > org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:163) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:208) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:194) > at > > org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:859) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:868) > > 2009-08-04 00:27:51,499 INFO > org.apache.hadoop.hdfs.server.namenode.NameNode: SHUTDOWN_MSG > > Can anyone explain me the reason ... i googled it .. but those explanations > weren't quite useful > > Thanks >
