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From Jean-Daniel Cryans <jdcry...@apache.org>
Subject Re: Has anybody run into NotServingRegionException ?
Date Wed, 18 Mar 2009 12:45:03 GMT
Michael,

This is normal when not followed by RetriesExhausted exceptions. That
exception is used by the region servers to tell the clients that a
certain region was moved (because of rebalancing or splitting) and
that they should refresh their cache.

J-D

On Wed, Mar 18, 2009 at 4:00 AM, Michael Dagaev
<michael.dagaev@gmail.com> wrote:
> Hi all
>
>    We run a small Hbase 0.18 cluster (4 machines).
> A few days ago the traffic (mostly writes) increased
> and we started to notice NotServingRegionExceptions.
>
> Has anybody run into such a problem ?
>
> org.apache.hadoop.hbase.NotServingRegionException: Region <...>  closed
>        at org.apache.hadoop.hbase.regionserver.HRegion.obtainRowLock(HRegion.java:1810)
>        at org.apache.hadoop.hbase.regionserver.HRegion.getLock(HRegion.java:1875)
>        at org.apache.hadoop.hbase.regionserver.HRegion.batchUpdate(HRegion.java:1406)
>        at org.apache.hadoop.hbase.regionserver.HRegion.batchUpdate(HRegion.java:1380)
>        at org.apache.hadoop.hbase.regionserver.HRegionServer.batchUpdate(HRegionServer.java:1114)
>        at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
>        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>        at java.lang.reflect.Method.invoke(Method.java:597)
>        at org.apache.hadoop.hbase.ipc.HbaseRPC$Server.call(HbaseRPC.java:554)
>        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:888)
>
> Thank  you for your cooperation,
> M.
>
> P.S. Yes, we are going to upgrade our cluster to Hbase 0.19
>

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