Sounds like your .Meta. table is corrupted. Thought that was fixed in 90.4...
On Jun 28, 2012, at 1:26 PM, Kasturi wrote: > Hi, > I have HBase master running on 3 nodes and region server on 4 other nodes on a > Mapr hadoop cluster. We have been using it for a while, and it was working > fine. > Yesterday, we had a disk crash on one of the masters. There were some further > issues and we had to delete the Hbase logs. Now, I am trying to restart the > Hbase master, which is in a stale state, but receiving the followign message: > > FATAL org.apache.hadoop.hbase.master.HMaster: Unhandled exception. Starting > shutdown. > java.lang.NullPointerException > at > org.apache.hadoop.hbase.master. > AssignmentManager.regionOnline(AssignmentManager.java:707) > at > org.apache.hadoop.hbase.master. > AssignmentManager.processFailover(AssignmentManager.java:216) > at > org.apache.hadoop.hbase.master. > HMaster.finishInitialization(HMaster.java:401) > > at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:282) > 2012-06-27 14:29:47,615 INFO org.apache.hadoop.hbase.master.HMaster: Aborting > > We are using Hbase version 0.90.4. > > Btw, after the disk crash, the application > using the HBase cluster was > complaining with the following message: > > java.io.IOException: HRegionInfo was null or empty in .META., > row=keyvalues={urls,http://www.blocked-website.com/main?wc=GQtuEwt%2FaxpHDQpyAgsdEB8WURUA& > ....... > > Can I recover HBase from this state without > losing the data? I am pretty new to > the HBase setups. Please advise. > >