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From "Dmitriy V. Ryaboy (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PIG-2396) Unable to open iterator for alias C
Date Sun, 04 Dec 2011 19:34:40 GMT

    [ https://issues.apache.org/jira/browse/PIG-2396?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13162447#comment-13162447
] 

Dmitriy V. Ryaboy commented on PIG-2396:
----------------------------------------

The error is caused by 1 of the map-reduce jobs this script generates failing. To find out
why it failed, you need the error logs of the failing tasks. If you go to the jobtracker page,
you should be able to see them. Could you post those logs?
                
> Unable to open iterator for alias C
> -----------------------------------
>
>                 Key: PIG-2396
>                 URL: https://issues.apache.org/jira/browse/PIG-2396
>             Project: Pig
>          Issue Type: Bug
>            Reporter: vaibhav 
>
> hi ....
> how to remove this error
> my script is this 
> users = load 'users' as (name:chararray, city:chararray);
> cinfo = load 'cityinfo' as (city:chararray, population:int);
> jnd = join cinfo by city, users by city using 'skewed';
> but error comes like that 
> 2011-12-05 00:18:30,517 [main] INFO  org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher
- 100% complete
> 2011-12-05 00:18:30,517 [main] ERROR org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher
- 1 map reduce job(s) failed!
> 2011-12-05 00:18:30,517 [main] ERROR org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher
- Failed to produce result in: "hdfs://localhost:54310/tmp/temp373391612/tmp1555821947"
> 2011-12-05 00:18:30,517 [main] INFO  org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher
- Some jobs have failed! Stop running all dependent jobs
> 2011-12-05 00:18:30,531 [main] INFO  org.apache.hadoop.metrics.jvm.JvmMetrics - Cannot
initialize JVM Metrics with processName=JobTracker, sessionId= - already initialized
> 2011-12-05 00:18:30,969 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1066: Unable
to open iterator for alias jnd

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