Error in Pig script when grouping on chararray column
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Key: PIG-913
URL: https://issues.apache.org/jira/browse/PIG-913
Project: Pig
Issue Type: Bug
Affects Versions: 0.4.0
Reporter: Viraj Bhat
Priority: Critical
Fix For: 0.4.0
I have a very simple script which fails at parsetime due to the schema I
specified in the loader.
{code}
data = LOAD '/user/viraj/studenttab10k' AS (s:chararray);
dataSmall = limit data 100;
bb = GROUP dataSmall by $0;
dump bb;
{code}
=====================================================================================================================
2009-08-06 18:47:56,297 [main] INFO org.apache.pig.Main - Logging error
messages to: /homes/viraj/pig-svn/trunk/pig_1249609676296.log
09/08/06 18:47:56 INFO pig.Main: Logging error messages to:
/homes/viraj/pig-svn/trunk/pig_1249609676296.log
2009-08-06 18:47:56,459 [main] INFO
org.apache.pig.backend.hadoop.executionengine.HExecutionEngine - Connecting to
hadoop file system at: hdfs://localhost:9000
09/08/06 18:47:56 INFO executionengine.HExecutionEngine: Connecting to hadoop
file system at: hdfs://localhost:9000
2009-08-06 18:47:56,694 [main] INFO
org.apache.pig.backend.hadoop.executionengine.HExecutionEngine - Connecting to
map-reduce job tracker at: localhost:9001
09/08/06 18:47:56 INFO executionengine.HExecutionEngine: Connecting to
map-reduce job tracker at: localhost:9001
2009-08-06 18:47:57,008 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR
1002: Unable to store alias bb
09/08/06 18:47:57 ERROR grunt.Grunt: ERROR 1002: Unable to store alias bb
Details at logfile: /homes/viraj/pig-svn/trunk/pig_1249609676296.log
=====================================================================================================================
=====================================================================================================================
Pig Stack Trace
---------------
ERROR 1002: Unable to store alias bb
org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable to open
iterator for alias bb
at org.apache.pig.PigServer.openIterator(PigServer.java:481)
at
org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:531)
at
org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:190)
at
org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:165)
at
org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:141)
at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:89)
at org.apache.pig.Main.main(Main.java:397)
Caused by: org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1002:
Unable to store alias bb
at org.apache.pig.PigServer.store(PigServer.java:536)
at org.apache.pig.PigServer.openIterator(PigServer.java:464)
... 6 more
Caused by: java.lang.NullPointerException
at
org.apache.pig.impl.logicalLayer.LOCogroup.unsetSchema(LOCogroup.java:359)
at
org.apache.pig.impl.logicalLayer.optimizer.SchemaRemover.visit(SchemaRemover.java:64)
at org.apache.pig.impl.logicalLayer.LOCogroup.visit(LOCogroup.java:335)
at org.apache.pig.impl.logicalLayer.LOCogroup.visit(LOCogroup.java:46)
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:67)
at
org.apache.pig.impl.logicalLayer.optimizer.LogicalOptimizer.optimize(LogicalOptimizer.java:187)
at org.apache.pig.PigServer.compileLp(PigServer.java:854)
at org.apache.pig.PigServer.compileLp(PigServer.java:791)
at org.apache.pig.PigServer.store(PigServer.java:509)
... 7 more
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