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From "Navis Ryu" <navis....@nexr.com>
Subject Re: Review Request 24688: parallel order by clause on a string column fails with IOException: Split points are out of order
Date Tue, 26 Aug 2014 03:51:51 GMT

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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/24688/
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(Updated Aug. 26, 2014, 3:51 a.m.)


Review request for hive.


Changes
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Addressed comments


Bugs: HIVE-7669
    https://issues.apache.org/jira/browse/HIVE-7669


Repository: hive-git


Description
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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}


Diffs (updated)
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  common/src/java/org/apache/hadoop/hive/conf/HiveConf.java 7f4afd9 
  common/src/java/org/apache/hadoop/hive/conf/Validator.java cea9c41 
  ql/src/java/org/apache/hadoop/hive/ql/exec/HiveTotalOrderPartitioner.java 6c22362 
  ql/src/java/org/apache/hadoop/hive/ql/exec/PartitionKeySampler.java 166461a 
  ql/src/java/org/apache/hadoop/hive/ql/exec/mr/ExecDriver.java ef72039 
  ql/src/test/org/apache/hadoop/hive/ql/exec/TestPartitionKeySampler.java PRE-CREATION 

Diff: https://reviews.apache.org/r/24688/diff/


Testing
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Thanks,

Navis Ryu


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