Critical Description
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;
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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.