how can we upgrade hadoop without any exception also describe upgrade
procedure concept
i tried to upgrade but got lots of exceptions
like:
inconsistance state exception,
org.apache.hadoop.security.AccessControlException
org.apache.hadoop.hdfs.server.namenode.FSNamesystem: FSNamesystem
initialization failed.
org.apache.hadoop.hdfs.server.namenode.NameNode:
org.apache.hadoop.hdfs.server.common.InconsistentFSStateException
org.apache.hadoop.hdfs.server.namenode.FSNamesystem: FSNamesystem
initialization failed
