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https://issues.apache.org/jira/browse/PIG-552?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Christopher Olston updated PIG-552:
-----------------------------------

    Description: 
I'm doing:

define myFunc myFunc('blah');
b = foreach a generate myFunc(*);

Pig parses it, but fails when it tries to run it on hadoop (I'm using "local" 
mode). It tries to invoke the class loader on "myFunc('blah')" instead of on 
"myFunc", which causes an exception.

The bug seems to stem from this part of JobControlCompiler.getJobConf():

                if(mro.UDFs.size()==1){
                    String compFuncSpec = mro.UDFs.get(0);
                    Class comparator = 
PigContext.resolveClassName(compFuncSpec);
                    if(ComparisonFunc.class.isAssignableFrom(comparator)) {
                        
jobConf.setMapperClass(PigMapReduce.MapWithComparator.class);
                        
jobConf.setReducerClass(PigMapReduce.ReduceWithComparator.class);
                        jobConf.set("pig.reduce.package", 
ObjectSerializer.serialize(pack));
                        jobConf.set("pig.usercomparator", "true");
                        jobConf.setOutputKeyClass(NullableTuple.class);
                        jobConf.setOutputKeyComparatorClass(comparator);
                    }
                } else {
                    jobConf.set("pig.sortOrder",
                        ObjectSerializer.serialize(mro.getSortOrder()));
                }


  was:
I'm doing:

define myFunc myFunc('blah');
b = foreach a generate myFunc(*);
c = order b by $0;

Pig parses it, but fails when it tries to run it on hadoop (I'm using "local" 
mode). It tries to invoke the class loader on "myFunc('blah')" instead of on 
"myFunc", which causes an exception.

The bug seems to stem from this part of JobControlCompiler.getJobConf():

                if(mro.UDFs.size()==1){
                    String compFuncSpec = mro.UDFs.get(0);
                    Class comparator = 
PigContext.resolveClassName(compFuncSpec);
                    if(ComparisonFunc.class.isAssignableFrom(comparator)) {
                        
jobConf.setMapperClass(PigMapReduce.MapWithComparator.class);
                        
jobConf.setReducerClass(PigMapReduce.ReduceWithComparator.class);
                        jobConf.set("pig.reduce.package", 
ObjectSerializer.serialize(pack));
                        jobConf.set("pig.usercomparator", "true");
                        jobConf.setOutputKeyClass(NullableTuple.class);
                        jobConf.setOutputKeyComparatorClass(comparator);
                    }
                } else {
                    jobConf.set("pig.sortOrder",
                        ObjectSerializer.serialize(mro.getSortOrder()));
                }


        Summary: UDF defined with argument causes class instantiation exception 
 (was: UDF defined with argument causes class instantiation exception, when UDF 
followed by sort)

> UDF defined with argument causes class instantiation exception
> --------------------------------------------------------------
>
>                 Key: PIG-552
>                 URL: https://issues.apache.org/jira/browse/PIG-552
>             Project: Pig
>          Issue Type: Bug
>    Affects Versions: types_branch
>            Reporter: Christopher Olston
>
> I'm doing:
> define myFunc myFunc('blah');
> b = foreach a generate myFunc(*);
> Pig parses it, but fails when it tries to run it on hadoop (I'm using "local" 
> mode). It tries to invoke the class loader on "myFunc('blah')" instead of on 
> "myFunc", which causes an exception.
> The bug seems to stem from this part of JobControlCompiler.getJobConf():
>                 if(mro.UDFs.size()==1){
>                     String compFuncSpec = mro.UDFs.get(0);
>                     Class comparator = 
> PigContext.resolveClassName(compFuncSpec);
>                     if(ComparisonFunc.class.isAssignableFrom(comparator)) {
>                         
> jobConf.setMapperClass(PigMapReduce.MapWithComparator.class);
>                         
> jobConf.setReducerClass(PigMapReduce.ReduceWithComparator.class);
>                         jobConf.set("pig.reduce.package", 
> ObjectSerializer.serialize(pack));
>                         jobConf.set("pig.usercomparator", "true");
>                         jobConf.setOutputKeyClass(NullableTuple.class);
>                         jobConf.setOutputKeyComparatorClass(comparator);
>                     }
>                 } else {
>                     jobConf.set("pig.sortOrder",
>                         ObjectSerializer.serialize(mro.getSortOrder()));
>                 }

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