Major Description
I have a Pig script which reports varying Stats for the same M/R job (same inputs). Sometimes the PigStats reports all the stats (such as Maps,Reduces,MaxMapTime,MinMapTime,AvgMapTime,MaxReduceTime, MinReduceTime and AvgReduceTime) for the M/R job as 0. Sometimes it reports it correctly.
Enclosed are the stderr logs for 2 runs, you can notice that for Run 1 job_201103091134_556600 from Run 1; has 0 against all the columns whereas in Run 2, Hadoop job job_201104272229_75693 has some valid values.
The actual Job Tracker link shows that they are non empty. This points to a bug in the interaction of the PigStats module with the Jobtracker.
Run 1:
Job Stats (time in seconds):
JobId Maps Reduces MaxMapTime MinMapTIme AvgMapTime MaxReduceTime MinReduceTime AvgReduceTime Alias Feature Outputs
job_201103091134_556458 160 100 552 191 368 1257 371 392 IN,SP10P,SP11P,SP12P,SP13P,SP16P,SP17P,SP18P,SP20P,SP21P,SP22P,SP23P,SP24P,SP26P,SP27P,SP28P,SP29P,SP30P,SP31P,SP32P,SP33P,SP34P,SP4P,SP6P,SP7P,SP8P,SP9P DISTINCT,MULTI_QUERY
job_201103091134_556600 0 0 0 0 0 0 0 0 UNION5 MULTI_QUERY,MAP_ONLY /user/viraj/dir,,
job_201103091134_556601 7 100 17 8 14 200 15 27 CNJOIN25,GNJOIN25,sampleNJOIN25 GROUP_BY,COMBINER
job_201103091134_556602 0 0 0 0 0 0 0 0 CNJOIN3,GNJOIN3,sampleNJOIN3 GROUP_BY,COMBINER
job_201103091134_556603 0 0 0 0 0 0 0 0 CNJOIN15,GNJOIN15,sampleNJOIN15 GROUP_BY,COMBINER
job_201103091134_556604 2 100 13 7 10 34 13 31 CNJOIN19,GNJOIN19,sampleNJOIN19 GROUP_BY,COMBINER
job_201103091134_556644 0 0 0 0 0 0 0 0 ONJOIN15 SAMPLER
job_201103091134_556645 0 0 0 0 0 0 0 0 ONJOIN25 SAMPLER
job_201103091134_556646 0 0 0 0 0 0 0 0 ONJOIN3 SAMPLER
job_201103091134_556654 0 0 0 0 0 0 0 0 ONJOIN19 SAMPLER
job_201103091134_556662 0 0 0 0 0 0 0 0 ONJOIN19 ORDER_BY,COMBINER
..
Run 2:
Job Stats (time in seconds):
JobId Maps Reduces MaxMapTime MinMapTIme AvgMapTime MaxReduceTime MinReduceTime AvgReduceTime Alias Feature Outputs
job_201104272229_75503 159 100 484 192 353 396 308 321 IN,SP10P,SP11P,SP12P,SP13P,SP16P,SP17P,SP18P,SP20P,SP21P,SP22P,SP23P,SP24P,SP26P,SP27P,SP28P,SP29P,SP30P,SP31P,SP32P,SP33P,SP34P,SP4P,SP6P,SP7P,SP8P,SP9P DISTINCT,MULTI_QUERY
job_201104272229_75693 18 0 31 14 24 0 0 UNION5 MULTI_QUERY,MAP_ONLY /user/viraj/dir,
job_201104272229_75694 7 100 34 13 22 46 20 25 CNJOIN25,GNJOIN25,sampleNJOIN25 GROUP_BY,COMBINER
job_201104272229_75695 125 100 19 11 15 32 18 26 CNJOIN3,GNJOIN3,sampleNJOIN3 GROUP_BY,COMBINER
job_201104272229_75698 1 100 12 12 12 13 9 11 CNJOIN15,GNJOIN15,sampleNJOIN15 GROUP_BY,COMBINER
job_201104272229_75702 2 100 21 5 13 35 22 26 CNJOIN19,GNJOIN19,sampleNJOIN19 GROUP_BY,COMBINER
job_201104272229_75724 1 1 4 4 4 11 11 11 ONJOIN15 SAMPLER
job_201104272229_75725 0 0 0 0 0 0 0 ONJOIN25 SAMPLER
job_201104272229_75726 6 1 8 6 8 24 24 24 ONJOIN3 SAMPLER
job_201104272229_75729 0 0 0 0 0 0 0 ONJOIN19 SAMPLER
job_201104272229_75752 1 100 5 5 5 12 9 11 ONJOIN19 ORDER_BY,COMBINER
..
Viraj