explain exception
-----------------
Key: PIG-261
URL: https://issues.apache.org/jira/browse/PIG-261
Project: Pig
Issue Type: Bug
Components: grunt
Environment: ubuntu 7.10
jdk1.6.0_06
ant 1.7.0
hadoop-0.17.0
Reporter: Haijun Cao
grunt> a = load 'whparsed_20071231';
grunt> b = filter a by $0 neq 'SE' AND ARITY (*) >= 6;
grunt> c = group b by ($4, $5);
grunt> d = foreach c {
>> e = distinct b.$1;
>> generate flatten (group), COUNT (b), COUNT (e);
>> }
grunt> explain d
Logical Plan:
|---LOEval ( GENERATE {[FLATTEN PROJECT $0],[COUNT(GENERATE {[PROJECT
$1]})],[COUNT(GENERATE {[PROJECT $1]->[PROJECT $1]->[DISTINCT ]})]} )
|---LOCogroup ( GENERATE {[PROJECT $4],[PROJECT $5],[*]} )
|---LOEval ( [FILTER BY (([PROJECT $0] neq ['SE']) AND
([ARITY(GENERATE {[*]})] >= ['6']))] )
|---LOLoad ( file = whparsed_20071231 )
-----------------------------------------------
Physical Plan:
|---POMapreduce
Map : Composite(*,Filter: AND )
Reduce :
Generate(Project(0),FuncEval(COUNT(Generate(Project(1)))),FuncEval(COUNT(Generate(Composite(Project(1),Project(1),Sort(Distinct(148045
[main] ERROR org.apache.pig.tools.grunt.GruntParser -
java.lang.NullPointerException
at
org.apache.pig.impl.eval.EvalSpecTreePrinter.visitSortDistinct(EvalSpecTreePrinter.java:42)
at
org.apache.pig.impl.eval.SortDistinctSpec.visit(SortDistinctSpec.java:130)
at
org.apache.pig.impl.eval.EvalSpecTreePrinter.visitCompositeEval(EvalSpecTreePrinter.java:111)
at
org.apache.pig.impl.eval.CompositeEvalSpec.visit(CompositeEvalSpec.java:116)
at
org.apache.pig.impl.eval.EvalSpecTreePrinter.visitGenerate(EvalSpecTreePrinter.java:61)
at org.apache.pig.impl.eval.GenerateSpec.visit(GenerateSpec.java:366)
at
org.apache.pig.impl.eval.EvalSpecTreePrinter.visitFuncEval(EvalSpecTreePrinter.java:95)
at org.apache.pig.impl.eval.FuncEvalSpec.visit(FuncEvalSpec.java:249)
at
org.apache.pig.impl.eval.EvalSpecTreePrinter.visitGenerate(EvalSpecTreePrinter.java:61)
at org.apache.pig.impl.eval.GenerateSpec.visit(GenerateSpec.java:366)
at
org.apache.pig.impl.physicalLayer.POTreePrinter.visitMapreduce(POTreePrinter.java:79)
at
org.apache.pig.backend.hadoop.executionengine.POMapreduce.visit(POMapreduce.java:281)
at
org.apache.pig.backend.hadoop.executionengine.MapRedPhysicalPlan.explain(MapRedPhysicalPlan.java:41)
at org.apache.pig.PigServer.explain(PigServer.java:442)
at
org.apache.pig.tools.grunt.GruntParser.processExplain(GruntParser.java:136)
at
org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:177)
at
org.apache.pig.tools.grunt.GruntParser.parseContOnError(GruntParser.java:73)
at org.apache.pig.tools.grunt.Grunt.run(Grunt.java:54)
at org.apache.pig.Main.main(Main.java:270)
148046 [main] ERROR org.apache.pig.tools.grunt.GruntParser -
java.lang.NullPointerException
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