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From "Carter Shanklin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-14660) ArrayIndexOutOfBoundsException on delete
Date Sun, 28 Aug 2016 17:19:21 GMT

    [ https://issues.apache.org/jira/browse/HIVE-14660?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15443795#comment-15443795
] 

Carter Shanklin commented on HIVE-14660:
----------------------------------------

[~ekoifman]  ran across this at random, not sure if you had seen it, does this problem still
exist in Hive 2.X?

> ArrayIndexOutOfBoundsException on delete
> ----------------------------------------
>
>                 Key: HIVE-14660
>                 URL: https://issues.apache.org/jira/browse/HIVE-14660
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 1.2.1
>            Reporter: Benjamin BONNET
>            Assignee: Benjamin BONNET
>         Attachments: HIVE-14660.1-banch-1.2.patch
>
>
> Hi,
> DELETE on an ACID table may fail on an ArrayIndexOutOfBoundsException.
> That bug occurs at Reduce phase when there are less reducers than the number of the table
buckets.
> In order to reproduce, create a simple ACID table :
> {code:sql}
> CREATE TABLE test (`cle` bigint,`valeur` string)
>  PARTITIONED BY (`annee` string)
>  CLUSTERED BY (cle) INTO 5 BUCKETS
>  TBLPROPERTIES ('transactional'='true');
> {code}
> Populate it with lines distributed among all buckets, with random values and a few partitions.
> Force the Reducers to be less than the buckets :
> {code:sql}
> set mapred.reduce.tasks=1;
> {code}
> Then execute a delete that will remove many lines from all the buckets.
> {code:sql}
> DELETE FROM test WHERE valeur<'some_value';
> {code}
> Then you will get an ArrayIndexOutOfBoundsException :
> {code}
> 2016-08-22 21:21:02,500 [FATAL] [TezChild] |tez.ReduceRecordSource|: org.apache.hadoop.hive.ql.metadata.HiveException:
Hive Runtime Error while processing row (tag=0) {"key":{"reducesinkkey0":{"transactionid":119,"bucketid":0,"rowid":0}},"value":{"_col0":"4"}}
>         at org.apache.hadoop.hive.ql.exec.tez.ReduceRecordSource$GroupIterator.next(ReduceRecordSource.java:352)
>         at org.apache.hadoop.hive.ql.exec.tez.ReduceRecordSource.pushRecord(ReduceRecordSource.java:274)
>         at org.apache.hadoop.hive.ql.exec.tez.ReduceRecordProcessor.run(ReduceRecordProcessor.java:252)
>         at org.apache.hadoop.hive.ql.exec.tez.TezProcessor.initializeAndRunProcessor(TezProcessor.java:150)
>         at org.apache.hadoop.hive.ql.exec.tez.TezProcessor.run(TezProcessor.java:139)
>         at org.apache.tez.runtime.LogicalIOProcessorRuntimeTask.run(LogicalIOProcessorRuntimeTask.java:344)
>         at org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable$1.run(TezTaskRunner.java:181)
>         at org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable$1.run(TezTaskRunner.java:172)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at javax.security.auth.Subject.doAs(Subject.java:415)
>         at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
>         at org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable.callInternal(TezTaskRunner.java:172)
>         at org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable.callInternal(TezTaskRunner.java:168)
>         at org.apache.tez.common.CallableWithNdc.call(CallableWithNdc.java:36)
>         at java.util.concurrent.FutureTask.run(FutureTask.java:262)
>         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.ArrayIndexOutOfBoundsException: 5
>         at org.apache.hadoop.hive.ql.exec.FileSinkOperator.process(FileSinkOperator.java:769)
>         at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:838)
>         at org.apache.hadoop.hive.ql.exec.SelectOperator.process(SelectOperator.java:88)
>         at org.apache.hadoop.hive.ql.exec.tez.ReduceRecordSource$GroupIterator.next(ReduceRecordSource.java:343)
>         ... 17 more
> {code}
> Adding logs into FileSinkOperator, one sees the operator deals with buckets 0, 1, 2,
3, 4, then 0 again and it fails at line 769 : actually each time you switch bucket, you move
forwards in a 5 (number of buckets) elements array. So when you get bucket 0 for the second
time, you get out of the array...



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