[HBASE-5279] NPE in Master after upgrading to 0.92.0

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.92.0
• Fix Version/s: 0.92.1
• Component/s: master
• Hadoop Flags: Reviewed
• Assignee: Tobias Herbert
• Reporter: Tobias Herbert
• Created: 25/Jan/12 20:34
• Updated: 20/Nov/15 11:54
• Resolved: 22/Feb/12 21:28

Description

I have upgraded my environment from 0.90.4 to 0.92.0

after the table migration I get the following error in the master (permanent)

2012-01-25 18:23:48,648 FATAL master-namenode,60000,1327512209588 org.apache.hadoop.hbase.master.HMaster - Unhandled exception. Starting shutdown.
java.lang.NullPointerException
        at org.apache.hadoop.hbase.master.AssignmentManager.rebuildUserRegions(AssignmentManager.java:2190)
        at org.apache.hadoop.hbase.master.AssignmentManager.joinCluster(AssignmentManager.java:323)
        at org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:501)
        at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:326)
        at java.lang.Thread.run(Thread.java:662)
2012-01-25 18:23:48,650 INFO namenode,60000,1327512209588 org.apache.hadoop.hbase.master.HMaster - Aborting

I think that's because I had a hard crash in the cluster a while ago - and the following WARN since then

2012-01-25 21:20:47,121 WARN namenode,60000,1327513078123-CatalogJanitor org.apache.hadoop.hbase.master.CatalogJanitor - REGIONINFO_QUALIFIER is empty in keyvalues={emails,,xxx./info:server/1314336400471/Put/vlen=38, emails,,1314189353300.xxx./info:serverstartcode/1314336400471/Put/vlen=8}

my patch was simple to go around the NPE (as the other code around the lines)
but I don't know if that's correct