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From "Stanislav Kogut (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-3078) 0.20.3: java.lang.IndexOutOfBoundsException in reduce task with TableOutputFormat
Date Mon, 04 Oct 2010 18:28:34 GMT
0.20.3: java.lang.IndexOutOfBoundsException in reduce task with TableOutputFormat

                 Key: HBASE-3078
                 URL: https://issues.apache.org/jira/browse/HBASE-3078
             Project: HBase
          Issue Type: Bug
          Components: mapred
    Affects Versions: 0.20.3
         Environment: Centos 5.5, 4 nodes, jre 1.6u21 x86_64, hbase 0.20.3, hadoop-0.20.2+228
(from cloudera)
            Reporter: Stanislav Kogut
            Priority: Minor

It happens very rare (was seen only once yet), but looks like it was caused inside HBase TableOutputFormat
class while running periodic mapreduce job on my cluster.

Here is a task log for failed task:

2010-10-04 12:08:00,339 WARN org.apache.hadoop.mapred.TaskTracker: Error running child
java.lang.IndexOutOfBoundsException: toIndex = 850
	at java.util.SubList.<init>(Unknown Source)
	at java.util.RandomAccessSubList.<init>(Unknown Source)
	at java.util.AbstractList.subList(Unknown Source)
	at org.apache.hadoop.hbase.client.HTable.flushCommits(HTable.java:611)
	at org.apache.hadoop.hbase.mapreduce.TableOutputFormat$TableRecordWriter.close(TableOutputFormat.java:80)
	at org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:567)
	at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:408)
	at org.apache.hadoop.mapred.Child.main(Child.java:170)
2010-10-04 12:08:00,343 INFO org.apache.hadoop.mapred.TaskRunner: Runnning cleanup for the

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