Solved it, I had terminated hbase, but not disabled the tables before
I copied the files to the new cluster.

-Håvard

On Mon, Feb 11, 2013 at 11:44 PM, Håvard Wahl Kongsgård
<haavard.kongsgaard@gmail.com> wrote:
> Hi, after migrating from cdh3 to cdh4 (for safety copying hbase folder
> to new cluster) I get this error on some of the tables.
>
>  Failed open of
> region=dd,llk-llq,1343345224610.48056c620e9f42d822551e10d73c500e.
> java.lang.IllegalStateException: Could not instantiate a region instance.
>         at org.apache.hadoop.hbase.regionserver.HRegion.newHRegion(HRegion.java:3123)
>         at org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:3254)
>         at org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.openRegion(OpenRegionHandler.java:331)
>         at org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.process(OpenRegionHandler.java:107)
>         at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:169)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
>         at java.lang.Thread.run(Thread.java:662)
> Caused by: java.lang.reflect.InvocationTargetException
>         at sun.reflect.GeneratedConstructorAccessor9.newInstance(Unknown Source)
>         at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
>         at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
>         at org.apache.hadoop.hbase.regionserver.HRegion.newHRegion(HRegion.java:3120)
>         ... 7 more
> Caused by: java.lang.NullPointerException
>         at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.loadTableCoprocessors(RegionCoprocessorHost.java:133)
>         at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.<init>(RegionCoprocessorHost.java:125)
>         at org.apache.hadoop.hbase.regionserver.HRegion.<init>(HRegion.java:376)
>         ... 11 more
>
> I found this issue: https://issues.apache.org/jira/browse/HBASE-6294
>
> --In a similar vain I found it impossible to switch a cluster from
> HBase <= 0.94 to HBase 0.96 (protobufs) without wiping the ZK state.
> --We typically say that the ZK is not important for operating HBase,
> but that is not strictly true. For example we need to the ZK state for
> replication.
>
> If this is the case, how do I wipe the ZK state?
>
>
> --
> Håvard Wahl Kongsgård
> Faculty of Medicine &
> Department of Mathematical Sciences
> NTNU
>
> http://havard.security-review.net/



-- 
Håvard Wahl Kongsgård
Faculty of Medicine &
Department of Mathematical Sciences
NTNU

http://havard.security-review.net/