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Date: Mon, 1 Sep 2014 07:37:21 +0000 (UTC)
From: "Lefty Leverenz (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
Message-ID: <JIRA.12732985.1407546433000.2218.1409557041130@Atlassian.JIRA>
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Subject: [jira] [Commented] (HIVE-7669) parallel order by clause on a string
 column fails with IOException: Split points are out of order
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    [ https://issues.apache.org/jira/browse/HIVE-7669?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14117130#comment-14117130 ] 

Lefty Leverenz commented on HIVE-7669:
--------------------------------------

Doc note:  This adds descriptions for configuration parameters *hive.optimize.sampling.orderby*, *hive.optimize.sampling.orderby.number*, and *hive.optimize.sampling.orderby.percent* which were introduced in Hive 0.12.0 but haven't been documented in the wiki yet.  They belong in the Query and DDL Execution section of Configuration Properties:

* [Configuration Properties -- Query and DDL Execution | https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-QueryandDDLExecution]

> parallel order by clause on a string column fails with IOException: Split points are out of order
> -------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-7669
>                 URL: https://issues.apache.org/jira/browse/HIVE-7669
>             Project: Hive
>          Issue Type: Bug
>          Components: HiveServer2, Query Processor, SQL
>    Affects Versions: 0.12.0
>         Environment: Hive 0.12.0-cdh5.0.0
> OS: Redhat linux
>            Reporter: Vishal Kamath
>            Assignee: Navis
>              Labels: TODOC14, orderby
>             Fix For: 0.14.0
>
>         Attachments: HIVE-7669.1.patch.txt, HIVE-7669.2.patch.txt, HIVE-7669.3.patch.txt, HIVE-7669.4.patch.txt
>
>
> The source table has 600 Million rows and it has a String column "l_shipinstruct" which has 4 unique values. (Ie. these 4 values are repeated across the 600 million rows)
> We are sorting it based on this string column "l_shipinstruct" as shown in the below HiveQL with the following parameters. 
> {code:sql}
> set hive.optimize.sampling.orderby=true;
> set hive.optimize.sampling.orderby.number=10000000;
> set hive.optimize.sampling.orderby.percent=0.1f;
> insert overwrite table lineitem_temp_report 
> select 
>   l_orderkey, l_partkey, l_suppkey, l_linenumber, l_quantity, l_extendedprice, l_discount, l_tax, l_returnflag, l_linestatus, l_shipdate, l_commitdate, l_receiptdate, l_shipinstruct, l_shipmode, l_comment
> from 
>   lineitem
> order by l_shipinstruct;
> {code}
> Stack Trace
> Diagnostic Messages for this Task:
> {noformat}
> Error: java.lang.RuntimeException: Error in configuring object
>         at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:109)
>         at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:75)
>         at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)
>         at org.apache.hadoop.mapred.MapTask$OldOutputCollector.<init>(MapTask.java:569)
>         at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:430)
>         at org.apache.hadoop.mapred.MapTask.run(MapTask.java:342)
>         at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:168)
>         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:1548)
>         at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:163)
> Caused by: java.lang.reflect.InvocationTargetException
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>         at java.lang.reflect.Method.invoke(Method.java:601)
>         at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:106)
>         ... 10 more
> Caused by: java.lang.IllegalArgumentException: Can't read partitions file
>         at org.apache.hadoop.mapreduce.lib.partition.TotalOrderPartitioner.setConf(TotalOrderPartitioner.java:116)
>         at org.apache.hadoop.mapred.lib.TotalOrderPartitioner.configure(TotalOrderPartitioner.java:42)
>         at org.apache.hadoop.hive.ql.exec.HiveTotalOrderPartitioner.configure(HiveTotalOrderPartitioner.java:37)
>         ... 15 more
> Caused by: java.io.IOException: Split points are out of order
>         at org.apache.hadoop.mapreduce.lib.partition.TotalOrderPartitioner.setConf(TotalOrderPartitioner.java:96)
>         ... 17 more
> {noformat}


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