There was a bug in the script on the 2nd to last line. Fixed it, still have same issue.
I found a workaround: if I store the CROSSED relation immediately after the CROSS, then load it... it works. Something about resetting the plan. This is a bug. I'll file a JIRA. On Wed, Dec 4, 2013 at 1:21 PM, Russell Jurney <russell.jur...@gmail.com>wrote: > I have this bug that is killing me, where I can't self-join/cross a > dataset with itself. Its blocking my work :( > > The script is like this: > > businesses = LOAD > 'yelp_phoenix_academic_dataset/yelp_academic_dataset_business.json' using > com.twitter.elephantbird.pig.load.JsonLoader() as json:map[]; > > /* {open=true, neighborhoods={}, review_count=14, stars=4.0, name=Drybar, > business_id=LcAamvosJu0bcPgEVF-9sQ, state=AZ, full_address=3172 E Camelback > Rd > Phoenix, AZ85018, categories={(Hair Salons),(Hair Stylists),(Beauty & > Spas)}, longitude=-112.0131927, latitude=33.5107772, type=business, > city=Phoenix} */ > locations = FOREACH businesses GENERATE $0#'business_id' AS business_id, > $0#'longitude' AS longitude, > $0#'latitude' AS latitude; > STORE locations INTO 'yelp_phoenix_academic_dataset/locations.tsv'; > locations_2 = LOAD 'yelp_phoenix_academic_dataset/locations.tsv' AS > (business_id:chararray, longitude:double, latitude:double); > location_comparisons = CROSS locations_2, locations; > > distances = FOREACH businesses GENERATE locations.business_id AS > business_id_1, > locations_2.business_id AS > business_id_2, > > udfs.haversine(locations.longitude, > locations.latitude, > > locations_2.longitude, > > locations_2.latitude) AS distance; > STORE distances INTO 'yelp_phoenix_academic_dataset/distances.tsv'; > > > I have also tried converting this to a self-join using JOIN BY '1', and > also locations_2 = locations, and I get the same error: > > *org.apache.pig.backend.executionengine.ExecException: ERROR 0: Scalar has > more than one row in the output. 1st : > (rncjoVoEFUJGCUoC1JgnUA,-112.241596,33.581867), 2nd > :(0FNFSzCFP_rGUoJx8W7tJg,-112.105933,33.604054)* > > at org.apache.pig.impl.builtin.ReadScalars.exec(ReadScalars.java:111) > > at > org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POUserFunc.getNext(POUserFunc.java:336) > > at > org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POUserFunc.getNext(POUserFunc.java:438) > > at > org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.getNext(PhysicalOperator.java:347) > > at > org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.processPlan(POForEach.java:378) > > at > org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.getNext(POForEach.java:298) > > at > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.runPipeline(PigGenericMapBase.java:283) > > at > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.map(PigGenericMapBase.java:278) > > at > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.map(PigGenericMapBase.java:64) > > at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144) > > at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764) > > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370) > > at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:212) > > This makes no sense! What am I to do? I can't self-join :( > -- > Russell Jurney twitter.com/rjurney russell.jur...@gmail.com datasyndrome. > com > -- Russell Jurney twitter.com/rjurney russell.jur...@gmail.com datasyndrome.com