[ https://issues.apache.org/jira/browse/PIG-4819?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Koji Noguchi updated PIG-4819: ------------------------------ Status: Patch Available (was: Reopened) > 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 > Fix For: 0.16.0 > > Attachments: pig-4819-v01.patch, pig-4819-v02.patch, > pig-4819-v02_fix_v01.patch, pig-4819-v02_fix_v02.patch, > pig-4819-v02_fix_v03.patch, pig-4819-v02_fix_v04.patch, > pig-4819-v02_fix_v05.patch, pig-4819-v02_fix_v06.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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)