incrementColumnValue/Memcache bug
---------------------------------
Key: HBASE-1352
URL: https://issues.apache.org/jira/browse/HBASE-1352
Project: Hadoop HBase
Issue Type: Bug
Components: regionserver
Affects Versions: 0.19.1
Environment: Ubuntu 8.10
Reporter: atppp
When I do a large amount of incrementColumnValue(), I got NullPointerException
thrown from Memcache.java:
2009-04-27 14:59:03,620 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server
handler 1 on 59710, call incrementColumnValue([...@1317bfb, [...@1c2a074,
[...@b427c1, 1) from 127.0.0.1:52296: error: java.io.IOException:
java.lang.NullPointerException
java.io.IOException: java.lang.NullPointerException
at org.apache.hadoop.hbase.regionserver.Memcache.get(Memcache.java:609)
at org.apache.hadoop.hbase.regionserver.Memcache.get(Memcache.java:244)
at org.apache.hadoop.hbase.regionserver.Memcache.get(Memcache.java:226)
at
org.apache.hadoop.hbase.regionserver.HRegion.incrementColumnValue(HRegion.java:2636)
at
org.apache.hadoop.hbase.regionserver.HRegionServer.incrementColumnValue(HRegionServer.java:2299)
at sun.reflect.GeneratedMethodAccessor13.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$Server.call(HBaseRPC.java:632)
at
org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:912)
(called from thrift interface)
I consistently hit this exception after restarting Hbase (exactly the same
location in my code)
Quick fix is (with HBASE-1319.patch applied) at Memcache.java:609, say if
(deletes != null) deletes.add(itKey);
but probably better to change Memcache.java:226. Also the trunk already changed
the StoreKey format and doesn't have this bug.
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