Hi Kamesh The problem cannot be specifically isolated. But i suggest you can try restarting your master.
But the exception says this In HBase there are catalog tables called ROOT and META(in 0.94.x) and only META in 0.96+. Basically META has information on all user regions and ROOT is a table that stores information on where the META table is. For the cluster to function these two tables should be online. If not the cluster would be unusable. Regards Ram On Wed, Oct 9, 2013 at 8:14 PM, Ted Yu <[email protected]> wrote: > Can you tell us what HBase and Hadoop versions you're using ? > > Thanks > > On Oct 9, 2013, at 5:32 AM, Venkata siva kamesh Bhallamudi < > [email protected]> wrote: > > > Hi All, > > I am getting following exception when I am trying to run *hbck *command > > > > Exception in thread "main" > > org.apache.hadoop.hbase.NotServingRegionException: > > org.apache.hadoop.hbase.NotServingRegionException: Region is not online: > > -ROOT-,,0 > > at > > > org.apache.hadoop.hbase.regionserver.HRegionServer.getRegion(HRegionServer.java:3166) > > at > > > org.apache.hadoop.hbase.regionserver.HRegionServer.getClosestRowBefore(HRegionServer.java:1986) > > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > > at > > > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > > at > > > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > > at java.lang.reflect.Method.invoke(Method.java:597) > > at > > > org.apache.hadoop.hbase.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:384) > > at > > > org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1426) > > > > Please help me understanding this exception and how to fix this. > > > > Thanks & Regards > > Kamesh. >
