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Failed to start namenode after upgrade from 5.x to 6.x


Failed to start namenode after upgrade from 5.x to 6.x


Hi, I'm running Cloudera express, upgraded CM and CDH to 6.2 and getting this error below:


Failed to start namenode.

File system image contains an old layout version -60.

An upgrade to version -64 is required.

Please restart NameNode with the "-rollingUpgrade started" option if a rolling upgrade is already started; or restart NameNode with the "-upgrade" option to start a new upgrade.

         at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(

         at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(

         at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(

         at org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(

         at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(

         at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(

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