Jimmy Xiang created HBASE-9044:
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Summary: Merging regions throws NPE
Key: HBASE-9044
URL: https://issues.apache.org/jira/browse/HBASE-9044
Project: HBase
Issue Type: Bug
Reporter: Jimmy Xiang
Assignee: Jimmy Xiang
{noformat}
hbase(main):003:0> merge_region '92ade79eb3ac390b09e2b19c74b56dad',
'92ade79eb3ac390b09e2b19c74b56dad'
2013-07-25 13:21:23,991 ERROR [main] client.HBaseAdmin: Unexpected exception:
com.google.protobuf.ServiceException:
org.apache.hadoop.hbase.ipc.RemoteWithExtrasException(java.lang.NullPointerException):
java.lang.NullPointerException
at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2108)
at
org.apache.hadoop.hbase.ipc.RpcServer$CallRunner.run(RpcServer.java:1809)
at
org.apache.hadoop.hbase.ipc.SimpleRpcScheduler.consumerLoop(SimpleRpcScheduler.java:165)
at
org.apache.hadoop.hbase.ipc.SimpleRpcScheduler.access$000(SimpleRpcScheduler.java:41)
at
org.apache.hadoop.hbase.ipc.SimpleRpcScheduler$1.run(SimpleRpcScheduler.java:113)
at java.lang.Thread.run(Thread.java:662)
from calling HMaster.dispatchMergingRegions
0 row(s) in 0.0160 seconds
{noformat}
I also saw the following in the master log:
{noformat}
2013-07-25 13:25:12,683 ERROR [MASTER_TABLE_OPERATIONS-a1220:36000-0]
executor.EventHandler: Caught throwable while processing event C_M_MERGE_REGION
java.lang.NullPointerException
at
org.apache.hadoop.hbase.master.handler.DispatchMergingRegionHandler.process(DispatchMergingRegionHandler.java:104)
at
org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:130)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
{noformat}
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