I have done 4 different upgrades (on 4 different clusters) and I get this error everytime. I have to wipe out /hbase and lose the data which is the exact opposite reason on why I am doing an upgrade. There must be a step missing from the upgrade instructions, I have followed them each time. I tried your solution here, and it doesn't work. When I try to restart HBase the master failes and I get this: Failed to become active master org.apache.hadoop.hbase.util.FileSystemVersionException: HBase file layout needs to be upgraded. You have version null and I want version 8. Consult http://hbase.apache.org/book.html for further information about upgrading HBase. Is your hbase.rootdir valid? If so, you may need to run 'hbase hbck -fixVersionFile'. I run hbase hdck -fixVersionFile and it gets stuck on 5/09/28 20:51:58 INFO client.RpcRetryingCaller: Call exception, tries=14, retries=35, started=128696 ms ago, cancelled=false, msg=
... View more
