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https://issues.apache.org/jira/browse/PIG-4819?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15176100#comment-15176100
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Rohini Palaniswamy commented on PIG-4819:
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+1
bq. But should I simply extend org.apache.pig.builtin.RANDOM from
org.apache.pig.piggybank.evaluation.math.RANDOM
Would be ideal, but if they use newer piggybank jar with older version of
pig it will break. So I think duplicating code is better for now.
> RANDOM() udf can lead to missing or redundant records
> -----------------------------------------------------
>
> Key: PIG-4819
> URL: https://issues.apache.org/jira/browse/PIG-4819
> Project: Pig
> Issue Type: Bug
> Reporter: Koji Noguchi
> Assignee: Koji Noguchi
> Attachments: pig-4819-v01.patch, pig-4819-v02.patch
>
>
> When RANDOM() value is used for grouping/distinct/etc, it breaks the
> mapreduce rule and can lead to redundant or missing records.
> Some discussion can be found in
> https://issues.apache.org/jira/browse/PIG-3257?focusedCommentId=13669195#comment-13669195
> We should make RANDOM less random so that it'll produce the same sequence of
> random values from the task retries.
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