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From "ryan rawson (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-1560) TIF (and other clients?) cant seem to find one region (getClosestRowBefore issue?)
Date Mon, 22 Jun 2009 02:26:07 GMT
TIF (and other clients?) cant seem to find one region (getClosestRowBefore issue?)
----------------------------------------------------------------------------------

                 Key: HBASE-1560
                 URL: https://issues.apache.org/jira/browse/HBASE-1560
             Project: Hadoop HBase
          Issue Type: Bug
    Affects Versions: 0.20.0
            Reporter: ryan rawson
            Priority: Blocker
             Fix For: 0.20.0


running a full TIF-mr on a table, it eventually fails, all on 1 of the splits, and all with
the same exception set, which is:

org.apache.hadoop.hbase.client.RetriesExhaustedException: Trying to contact region server
null for region , row '', but failed after 10 attempts.
Exceptions:
java.lang.NullPointerException
java.lang.NullPointerException
java.lang.NullPointerException
java.lang.NullPointerException
java.lang.NullPointerException
java.lang.NullPointerException
java.lang.NullPointerException
java.lang.NullPointerException
java.lang.NullPointerException
java.lang.NullPointerException

	at org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getRegionServerWithRetries(HConnectionManager.java:935)
	at org.apache.hadoop.hbase.client.HTable$ClientScanner.nextScanner(HTable.java:1842)
	at org.apache.hadoop.hbase.client.HTable$ClientScanner.initialize(HTable.java:1790)
	at org.apache.hadoop.hbase.client.HTable.getScanner(HTable.java:369)
	at org.apache.hadoop.hbase.mapred.TableInputFormatBase$TableRecordReader.restart(TableInputFormatBase.java:121)
	at org.apache.hadoop.hbase.mapred.TableInputFormatBase$TableRecordReader.next(TableInputFormatBase.java:222)
	at org.apache.hadoop.hbase.mapred.TableInputFormatBase$TableRecordReader.next(TableInputFormatBase.java:90)
	at org.apache.hadoop.mapred.MapTask$TrackedRecordReader.moveToNext(MapTask.java:191)
	at org.apache.hadoop.mapred.MapTask$TrackedRecordReader.next(MapTask.java:175)
	at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:48)
	at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:356)
	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
	at org.apache.hadoop.mapred.Child.main(Child.java:170)

Suspicion: We can't locate the 'root' region with key '' or null.  Probably an issue with
getClosestRowBefore.

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