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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-459) WrongRegionException should be like NSRE exception?
Date Thu, 21 Feb 2008 19:33:20 GMT
WrongRegionException should be like NSRE exception?
---------------------------------------------------

                 Key: HBASE-459
                 URL: https://issues.apache.org/jira/browse/HBASE-459
             Project: Hadoop HBase
          Issue Type: Bug
          Components: regionserver
    Affects Versions: 0.1.0, 0.2.0
            Reporter: stack
            Priority: Blocker


Jim was just running a loading test.  It failed because of a WrongRegionException.  At first
I thought it HBASE-428 -- because we were making regions w/ same start and end key -- but
looking closer, it looks like the client is getting a WRE thought its making a legitimate
request; it just happens to be asking for a row from the top-half of a region just as it split.
 I would think that on WRE, the client would at least retry in same manner in which it does
when it gets a NSRE?

Here is the split detail:

{code}
2008-02-21 19:15:11,747 INFO  [regionserver/0:0:0:0:0:0:0:0:8020.compactor] hbase.HRegionServer$CompactSplitThread(345):
region split, META updated, and report to master all successful. Old region=regionname: TestTable,0018951818,1203620807290,
startKey: <0018951818>, endKey: <0022085183>, encodedName: 1601381187, offline:
true, split: true, tableDesc: {name: TestTable, families: {info:={name: info, max versions:
3, compression: NONE, in memory: false, block cache enabled: false, max length: 2147483647,
bloom filter: none}}}, new regions: TestTable,0018951818,1203621311590, TestTable,0020990296,1203621311590.
Split took 0sec
{code}

Here is the WRE:

{code}
org.apache.hadoop.hbase.WrongRegionException: org.apache.hadoop.hbase.WrongRegionException:
Requested row out of range for HRegion TestTable,0018951818,1203620807290, startKey='0018951818',
getEndKey()='0022085183', row='0062914560'
	at org.apache.hadoop.hbase.HRegion.checkRow(HRegion.java:1496)
	at org.apache.hadoop.hbase.HRegion.obtainRowLock(HRegion.java:1541)
	at org.apache.hadoop.hbase.HRegion.batchUpdate(HRegion.java:1236)
	at org.apache.hadoop.hbase.HRegionServer.batchUpdate(HRegionServer.java:1450)
	at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.apache.hadoop.hbase.ipc.HbaseRPC$Server.call(HbaseRPC.java:413)
	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:910)

	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
	at java.lang.reflect.Constructor.newInstance(Unknown Source)
	at org.apache.hadoop.hbase.RemoteExceptionHandler.decodeRemoteException(RemoteExceptionHandler.java:82)
	at org.apache.hadoop.hbase.client.HTable.getRegionServerWithRetries(HTable.java:1008)
	at org.apache.hadoop.hbase.client.HTable.commit(HTable.java:751)
	at org.apache.hadoop.hbase.client.HTable.commit(HTable.java:740)
	at org.apache.hadoop.hbase.client.HTable.commit(HTable.java:721)
	at org.apache.hadoop.hbase.PerformanceEvaluation$SequentialWriteTest.testRow(PerformanceEvaluation.java:463)
	at org.apache.hadoop.hbase.PerformanceEvaluation$Test.test(PerformanceEvaluation.java:331)
	at org.apache.hadoop.hbase.PerformanceEvaluation.runOneClient(PerformanceEvaluation.java:527)
	at org.apache.hadoop.hbase.PerformanceEvaluation$EvaluationMapTask.map(PerformanceEvaluation.java:176)
	at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:208)
	at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2071)
{code}

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