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Pig, mail # user - Unable to open iterator


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Re: Unable to open iterator
Dmitriy Ryaboy 2012-08-29, 06:47
Please take a look at your job tracker page. It will have a failed job, which will have failed tasks, which will have more detailed error logs.

On Aug 28, 2012, at 5:52 PM, Mohit Anchlia <[EMAIL PROTECTED]> wrote:

> I have this simple pig script but when I run I get:
>
> 2012-08-28 17:50:24,924 [main] INFO
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher
> - Failed!
> 2012-08-28 17:50:24,939 [main] ERROR org.apache.pig.tools.grunt.Grunt -
> ERROR 1066: Unable to open iterator for alias C
>
> DEFINE SequenceFileLoader
> org.apache.pig.piggybank.storage.SequenceFileLoader();
> A = LOAD '/flume_vol/flume/2012/08/24/13/dslg1/*.snappy' USING
> SequenceFileLoader AS (key:long, document:bytearray);
> B = GROUP A BY key;
> C = foreach B generate COUNT(A);
> dump C;
>
>
> I do see data in the files:
>
> hadoop fs -cat
> /flume_vol/flume/2012/08/24/13/dslg1/web.1345840674870.snappy|more
> SEQ!org.apache.hadoop.io.LongWritable"org.apache.hadoop.io.BytesWritable)org.apache.hadoop.io.compress.SnappyCodec
> ~