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https://issues.apache.org/jira/browse/PIG-4169?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Cheolsoo Park updated PIG-4169:
-------------------------------
Attachment: PIG-4169-1.patch
Uploading a patch that fixes the NPE.
> NPE in ConstantCalculator
> -------------------------
>
> Key: PIG-4169
> URL: https://issues.apache.org/jira/browse/PIG-4169
> Project: Pig
> Issue Type: Bug
> Components: impl
> Reporter: Cheolsoo Park
> Assignee: Cheolsoo Park
> Fix For: 0.14.0
>
> Attachments: PIG-4169-1.patch
>
>
> To reproduce the issue, run the following query-
> {code}
> a = LOAD 'foo' AS (x:int);
> b = FOREACH a GENERATE TOTUPLE((chararray)null);
> DUMP b;
> {code}
> As can be seen, it is calling TOTUPLE with null. This causes a front-end
> exception with the following stack trace-
> {code}
> Caused by: org.apache.pig.impl.logicalLayer.FrontendException: ERROR 0:
> org.apache.pig.backend.executionengine.ExecException: ERROR 0: Exception
> while executing [POUserFunc (Name:
> POUserFunc(org.apache.pig.builtin.TOTUPLE)[tuple] - scope-13 Operator Key:
> scope-13) children: null at []]: java.lang.NullPointerException
> at
> org.apache.pig.newplan.logical.rules.ConstantCalculator$ConstantCalculatorTransformer$ConstantCalculatorExpressionVisitor.execute(ConstantCalculator.java:154)
> at
> org.apache.pig.newplan.logical.expression.AllSameExpressionVisitor.visit(AllSameExpressionVisitor.java:143)
> at
> org.apache.pig.newplan.logical.expression.UserFuncExpression.accept(UserFuncExpression.java:112)
> at
> org.apache.pig.newplan.ReverseDependencyOrderWalkerWOSeenChk.walk(ReverseDependencyOrderWalkerWOSeenChk.java:69)
> at org.apache.pig.newplan.PlanVisitor.visit(PlanVisitor.java:52)
> at
> org.apache.pig.newplan.logical.optimizer.AllExpressionVisitor.visitAll(AllExpressionVisitor.java:72)
> at
> org.apache.pig.newplan.logical.optimizer.AllExpressionVisitor.visit(AllExpressionVisitor.java:131)
> at
> org.apache.pig.newplan.logical.relational.LOGenerate.accept(LOGenerate.java:245)
> at
> org.apache.pig.newplan.DependencyOrderWalker.walk(DependencyOrderWalker.java:75)
> at
> org.apache.pig.newplan.logical.optimizer.AllExpressionVisitor.visit(AllExpressionVisitor.java:124)
> at
> org.apache.pig.newplan.logical.relational.LOForEach.accept(LOForEach.java:87)
> at
> org.apache.pig.newplan.DependencyOrderWalker.walk(DependencyOrderWalker.java:75)
> at org.apache.pig.newplan.PlanVisitor.visit(PlanVisitor.java:52)
> at
> org.apache.pig.newplan.logical.rules.ConstantCalculator$ConstantCalculatorTransformer.transform(ConstantCalculator.java:181)
> at
> org.apache.pig.newplan.optimizer.PlanOptimizer.optimize(PlanOptimizer.java:110)
> ... 16 more
> Caused by: org.apache.pig.backend.executionengine.ExecException: ERROR 0:
> Exception while executing [POUserFunc (Name:
> POUserFunc(org.apache.pig.builtin.TOTUPLE)[tuple] - scope-13 Operator Key:
> scope-13) children: null at []]: java.lang.NullPointerException
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.getNext(PhysicalOperator.java:360)
> at
> org.apache.pig.newplan.logical.rules.ConstantCalculator$ConstantCalculatorTransformer$ConstantCalculatorExpressionVisitor.execute(ConstantCalculator.java:151)
> ... 30 more
> Caused by: java.lang.NullPointerException
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POUserFunc.getNext(POUserFunc.java:284)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POUserFunc.getNextTuple(POUserFunc.java:383)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.getNext(PhysicalOperator.java:355)
> ... 31 more
> {code}
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