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https://issues.apache.org/jira/browse/PIG-2370?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13163948#comment-13163948
 ] 

Thejas M Nair commented on PIG-2370:
------------------------------------

+1
                
> SkewedParitioner results in Kerberos error
> ------------------------------------------
>
>                 Key: PIG-2370
>                 URL: https://issues.apache.org/jira/browse/PIG-2370
>             Project: Pig
>          Issue Type: Bug
>    Affects Versions: 0.9.2
>         Environment: -bash-3.1$ hadoop version
> Hadoop 0.23.0.1111080202
> Subversion 
> http://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23.0/hadoop-common-project/hadoop-common
>  -r 1196973
> Compiled by hadoopqa on Tue Nov  8 02:12:04 PST 2011
> From source with checksum 4e42b2d96c899a98a8ab8c7cc23f27ae
> -bash-3.1$ pig -version
> USING: /homes/araceli/pighome/dotNext/current
> Apache Pig version 0.9.2.1111101150 (r1200499)
> compiled Nov 10 2011, 19:50:15
>            Reporter: Araceli Henley
>            Assignee: Daniel Dai
>         Attachments: PIG-2370-1.patch
>
>
> Most of the SkewedJoin tests fail.
> a = load '/user/user1/pig/tests/data/singlefile/studenttab10k' using 
> PigStorage() as (name, age, gpa);
> b = load '/user/user1/pig/tests/data/singlefile/votertab10k' as (name, age, 
> registration, contributions);
> e = join a by name, b by name using 'skewed' parallel 8;
> store e into '/user/user1/pig/out/user1.1321044742/SkewedJoin_1.out';
> Backend error message
> ---------------------
> AttemptID:attempt_1321041443489_0400_m_000000_0 Info:Error: 
> java.lang.RuntimeException: java.io.IOException: Can't get JobTracker 
> Kerberos principal for use as renewer
>         at 
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.partitioners.SkewedPartitioner.setConf(SkewedPartitioner.java:119)
>         at 
> org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:70)
>         at 
> org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:125)
>         at 
> org.apache.hadoop.mapred.MapTask$NewOutputCollector.<init>(MapTask.java:627)
>         at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:695)
>         at org.apache.hadoop.mapred.MapTask.run(MapTask.java:328)
>         at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:147)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at javax.security.auth.Subject.doAs(Subject.java:396)
>         at 
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1152)
>         at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:142)
> Caused by: java.io.IOException: Can't get JobTracker Kerberos principal for 
> use as renewer
>         at 
> org.apache.hadoop.mapreduce.security.TokenCache.obtainTokensForNamenodesInternal(TokenCache.java:106)
>         at 
> org.apache.hadoop.mapreduce.security.TokenCache.obtainTokensForNamenodesInternal(TokenCache.java:90)
>         at 
> org.apache.hadoop.mapreduce.security.TokenCache.obtainTokensForNamenodes(TokenCache.java:83)
>         at 
> org.apache.hadoop.mapreduce.lib.input.FileInputFormat.listStatus(FileInputFormat.java:205)
>         at 
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigFileInputFormat.listStatus(PigFileInputFormat.java:37)
>         at 
> org.apache.hadoop.mapreduce.lib.input.FileInputFormat.getSplits(FileInputFormat.java:269)
>         at 
> org.apache.pig.impl.io.ReadToEndLoader.init(ReadToEndLoader.java:154)
>         at 
> org.apache.pig.impl.io.ReadToEndLoader.<init>(ReadToEndLoader.java:116)
>         at 
> org.apache.pig.backend.hadoop.executionengine.util.MapRedUtil.loadPartitionFileFromLocalCache(MapRedUtil.java:101)
>         at 
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.partitioners.SkewedPartitioner.setConf(SkewedPartitioner.java:114)
>         ... 10 more

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