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Posted to dev@pig.apache.org by "Cheolsoo Park (JIRA)" <ji...@apache.org> on 2014/03/18 21:46:49 UTC
[jira] [Updated] (PIG-3813) Rank column is assigned different uids
everytime when schema is reset
[ https://issues.apache.org/jira/browse/PIG-3813?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Cheolsoo Park updated PIG-3813:
-------------------------------
Summary: Rank column is assigned different uids everytime when schema is reset (was: PigGenericMapBase runPipeline() method returns empty tuples and goes into infinite loop under certain conditions)
Updating the title to describe the root cause.
> Rank column is assigned different uids everytime when schema is reset
> ---------------------------------------------------------------------
>
> Key: PIG-3813
> URL: https://issues.apache.org/jira/browse/PIG-3813
> Project: Pig
> Issue Type: Bug
> Components: impl
> Affects Versions: 0.12.0
> Reporter: Suhas Satish
> Assignee: Cheolsoo Park
> Priority: Critical
> Attachments: PIG-3813-1.patch, PIG-3813-2.patch, test_data.txt
>
>
> When the following script is run, pig goes into an infinite loop. This was reproduced on pig trunk as of March 12, 2014 on apache hadoop 1.2. test_data.txt has been attached.
> test.pig
> tWeek = LOAD '/tmp/test_data.txt' USING PigStorage ('|') AS (WEEK:int, DESCRIPTION:chararray, END_DATE:chararray, PERIOD:int);
> gTWeek = FOREACH tWeek GENERATE WEEK AS WEEK, PERIOD AS PERIOD;
> pWeek = FILTER gTWeek BY PERIOD == 201312;
> pWeekRanked = RANK pWeek BY WEEK ASC DENSE;
> gpWeekRanked = FOREACH pWeekRanked GENERATE $0;
> store gpWeekRanked into 'gpWeekRanked';
> describe gpWeekRanked;
> ---------------------------------------------------
> The res object of class Result, gets its value from leaf.getNextTuple()
> This gets an empty tuple
> ()
> with STATUS_OK.
> SO the while(true) condition never gets an End of Processing (EOP) and so does not exit.
>
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