[PIG-3132] NPE when illustrating a relation with HCatLoader

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.11.1
• Hadoop Flags: Reviewed
• Assignee: Daniel Dai
• Reporter: Daniel Dai
• Created: 22/Jan/13 22:50
• Updated: 02/Apr/13 15:54
• Resolved: 18/Mar/13 17:27

Description

Get NPE exception when illustrate a relation with HCatLoader:

A = LOAD 'studenttab10k' USING org.apache.hcatalog.pig.HCatLoader();
illustrate A;

Exception:

java.lang.NullPointerException
        at org.apache.hcatalog.pig.PigHCatUtil.transformToTuple(PigHCatUtil.java:274)
        at org.apache.hcatalog.pig.PigHCatUtil.transformToTuple(PigHCatUtil.java:238)
        at org.apache.hcatalog.pig.HCatBaseLoader.getNext(HCatBaseLoader.java:61)
        at org.apache.pig.impl.io.ReadToEndLoader.getNextHelper(ReadToEndLoader.java:210)
        at org.apache.pig.impl.io.ReadToEndLoader.getNext(ReadToEndLoader.java:190)
        at org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POLoad.getNext(POLoad.java:129)
        at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.runPipeline(PigGenericMapBase.java:267)
        at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.map(PigGenericMapBase.java:262)
        at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.map(PigGenericMapBase.java:64)
        at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:145)
        at org.apache.pig.pen.LocalMapReduceSimulator.launchPig(LocalMapReduceSimulator.java:194)
        at org.apache.pig.pen.ExampleGenerator.getData(ExampleGenerator.java:257)
        at org.apache.pig.pen.ExampleGenerator.readBaseData(ExampleGenerator.java:222)
        at org.apache.pig.pen.ExampleGenerator.getExamples(ExampleGenerator.java:154)
        at org.apache.pig.PigServer.getExamples(PigServer.java:1245)
        at org.apache.pig.tools.grunt.GruntParser.processIllustrate(GruntParser.java:698)
        at org.apache.pig.tools.pigscript.parser.PigScriptParser.Illustrate(PigScriptParser.java:591)
        at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:306)
        at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:188)
        at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:164)
        at org.apache.pig.tools.grunt.Grunt.run(Grunt.java:67)

HCatalog side is tracked with HCATALOG-163.

Issue Links

• relates to: HCATALOG-163 NPE when illustrating a relation