[zebra] merge join on large table ( 100,000.000 rows zebra table) failed
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Key: PIG-1145
URL: https://issues.apache.org/jira/browse/PIG-1145
Project: Pig
Issue Type: Bug
Affects Versions: 0.6.0
Reporter: Jing Huang
Pig script :
register $zebraJar;
--fs -rmr $outputDir
a1 = LOAD '$inputDir/unsorted1' USING
org.apache.hadoop.zebra.pig.TableLoader('count,seed,int1,str2');
a2 = LOAD '$inputDir/unsorted2' USING
org.apache.hadoop.zebra.pig.TableLoader('count,seed,int1,str2');
sort1 = order a1 by str2;
sort2 = order a2 by str2;
--store sort1 into '$outputDir/sorted11' using
org.apache.hadoop.zebra.pig.TableStorer('[count,seed,int1,str2]');
--store sort2 into '$outputDir/sorted21' using
org.apache.hadoop.zebra.pig.TableStorer('[count,seed,int1,str2]');
rec1 = load '$outputDir/sorted11' using
org.apache.hadoop.zebra.pig.TableLoader();
rec2 = load '$outputDir/sorted21' using
org.apache.hadoop.zebra.pig.TableLoader();
joina = join rec1 by str2, rec2 by str2 using "merge" ;
--E = foreach joina generate $0 as count, $1 as seed, $2 as int1, $3 as
str2;
store joina into '$outputDir/join1' using
org.apache.hadoop.zebra.pig.TableStorer('');
~
~
~
======
stacktrace:
org.apache.pig.backend.executionengine.ExecException: ERROR 2176: Error
processing right input during merge join at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POMergeJoin.throwProcessingException(POMergeJoin.java:453)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POMergeJoin.getNextRightInp(POMergeJoin.java:443)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POMergeJoin.getNext(POMergeJoin.java:337)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.runPipeline(PigMapBase.java:253)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.close(PigMapBase.java:107)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:57) at
org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:358) at
org.apache.hadoop.mapred.MapTask.run(MapTask.java:307) at
org.apache.hadoop.mapred.Child.main(Child.java:159) Caused by:
java.io.EOFException: No key-value to read at
org.apache.hadoop.zebra.tfile.TFile$Reader$Scanner.checkKey(TFile.java:1590) at
org.apache.hadoop.zebra.tfile.TFile$Reader$Scanner.entry(TFile.java:1611) at
org.apache.hadoop.zebra.io.ColumnGroup$Reader$TFileScanner.getKey(ColumnGroup.java:854)
at
org.apache.hadoop.zebra.io.ColumnGroup$Reader$CGScanner.getCGKey(ColumnGroup.java:1035)
at
org.apache.hadoop.zebra.io.BasicTable$Reader$BTScanner.getKey(BasicTable.java:1082)
at
org.apache.hadoop.zebra.mapred.TableRecordReader.next(TableRecordReader.java:105)
at org.apache.hadoop.zebra.pig.TableLoader.getNext(TableLoader.java:414) at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POMergeJoin.getNextRightInp(POMergeJoin.java:415)
... 7 more
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