Has anybody run into NotServingRegionException ?

[Michael Dagaev]

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