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https://issues.apache.org/jira/browse/PIG-1710?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Corinne Chandel resolved PIG-1710.
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Resolution: Fixed
Fix Version/s: 0.9.0
Marking resolved.
> Document limitation on how many aliases cogroup can handle and why users
> should not cogroup more than 127 aliases
> -----------------------------------------------------------------------------------------------------------------
>
> Key: PIG-1710
> URL: https://issues.apache.org/jira/browse/PIG-1710
> Project: Pig
> Issue Type: Bug
> Components: documentation
> Reporter: Viraj Bhat
> Assignee: Corinne Chandel
> Fix For: 0.9.0
>
>
> We have a usecase in Pig where we cogroup on more than 2000 aliases.
> {code}
> cogroup_1 = foreach(cogroup A, B, C ... more than 2000 aliases ) generate
> flatten (udf(....));
> {code}
> But we found out that there is a limitation on how many aliases a cogroup can
> handle which is aound 127
> So we had to workaround this by using 10-15 batches of 127 cogroups.
> {code}
> cogroup_1 = foreach(cogroup A, B, C ... 127 aliases ) generate flatten
> (udf(....));
> cogroup_2 = foreach(cogroup A, B, C ... 127 aliases ) generate flatten
> (udf(....));
> ...
> cogroup_15 = foreach(cogroup A, B, C ... 127 aliases ) generate flatten
> (udf(....));
> {code}
> Is there some documentation on this?
> Viraj
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