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https://issues.apache.org/jira/browse/PIG-4175?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jim Huang updated PIG-4175:
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Attachment: pig_testcross_plan.png
> PIG CROSS operation follow by STORE produces non-deterministic results each
> run
> -------------------------------------------------------------------------------
>
> Key: PIG-4175
> URL: https://issues.apache.org/jira/browse/PIG-4175
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.11, 0.12.0
> Environment: RHEL 6/64-bit
> Reporter: Jim Huang
> Attachments: mktestdata.py, pig_testcross_plan.png, test_cross.out,
> test_cross.pig
>
>
> Three files will be attached to help visualize this issue.
> 1. mktestdata.py - to generate test data to feed the pig script
> 2. test_cross.pig - the PIG script using CROSS and STORE
> 3. test_cross.out - the PIG console output showing the input/output records
> delta
> To reproduce this PIG CROSS operation problem, you need to use the supplied
> Python script,
> mktestdata.py, to generate an input file that is at least 13,948,228,930
> bytes (> 13GB).
> The CROSS between raw_data (m records) and cross_count (1 record) should
> yield exactly (m records) as the output.
> The STORE results from the CROSS operations yielded about 1/3 of input record
> in raw_data as the output.
> If I joined the both of the CROSS operations together, the STORE results from
> the CROSS operations yielded about 2/3
> of the input records in raw-data as the output.
> -- data = CROSS raw_data, field04s_count, subsection1_field04s_count,
> subsection2_field04s_count;
> We have reproduced this using both Pig 0.11 (Hadoop 1.x) and Pig 0.12 (Hadoop
> 2.x) clusters.
> The default HDFS block size is 128MB.
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