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From "Viraj Bhat (JIRA)" <j...@apache.org>
Subject [jira] Created: (PIG-913) Error in Pig script when grouping on chararray column
Date Fri, 07 Aug 2009 01:51:14 GMT
Error in Pig script when grouping on chararray column
-----------------------------------------------------

                 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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