Null pointer exception with load as schema - Optimizer
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Key: PIG-288
URL: https://issues.apache.org/jira/browse/PIG-288
Project: Pig
Issue Type: Bug
Components: impl
Affects Versions: types_branch
Reporter: Santhosh Srinivasan
A new test case (testNestedPlan) added to TestEvalPipeline has the following
query:
pig.registerQuery("A = LOAD 'file:" + tmpFile + "'as (a:int, b:int);");
pig.registerQuery("B = group A by $0;");
+ "C1 = filter A by $0 > -1;"
+ "C2 = distinct C1;"
+ "C3 = distinct A;"
+ "generate (int)group;"
+ "};";
Testcase: testNestedPlan took 0.913 sec
Caused an ERROR
Unable to open iterator for alias: C
java.io.IOException: Unable to open iterator for alias: C
at
org.apache.pig.impl.util.WrappedIOException.wrap(WrappedIOException.java:34)
at org.apache.pig.PigServer.openIterator(PigServer.java:268)
at
org.apache.pig.test.TestEvalPipeline.testNestedPlan(TestEvalPipeline.java:376)
Caused by: org.apache.pig.impl.plan.optimizer.OptimizerException: Unable to
insert type casts into plan
at
org.apache.pig.impl.logicalLayer.optimizer.TypeCastInserter.transform(TypeCastInserter.java:144)
at
org.apache.pig.impl.plan.optimizer.PlanOptimizer.optimize(PlanOptimizer.java:63)
at org.apache.pig.PigServer.compileLp(PigServer.java:551)
at org.apache.pig.PigServer.execute(PigServer.java:477)
at org.apache.pig.PigServer.openIterator(PigServer.java:259)
... 16 more
Caused by: java.lang.NullPointerException
at org.apache.pig.impl.logicalLayer.LOVisitor.visit(LOVisitor.java:121)
at
org.apache.pig.impl.logicalLayer.optimizer.SchemaRemover.visit(SchemaRemover.java:65)
at org.apache.pig.impl.logicalLayer.LOCogroup.visit(LOCogroup.java:273)
at org.apache.pig.impl.logicalLayer.LOCogroup.visit(LOCogroup.java:37)
at
org.apache.pig.impl.plan.DependencyOrderWalker.walk(DependencyOrderWalker.java:68)
at org.apache.pig.impl.plan.PlanVisitor.visit(PlanVisitor.java:51)
at
org.apache.pig.impl.logicalLayer.optimizer.LogicalTransformer.rebuildSchemas(LogicalTransformer.java:57)
at
org.apache.pig.impl.logicalLayer.optimizer.TypeCastInserter.transform(TypeCastInserter.java:141)
... 20 more
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