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https://issues.apache.org/jira/browse/PIG-2404?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13165497#comment-13165497
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xuting zhao commented on PIG-2404:
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Hi I am new to python and I have got one question about this problem: For the
b.py in the example, Do we need to define some schemaFunction like those
examples in "Programming Pig"? I built a unit test in trunk with extra
schemaFunction in b.py and it seems work with those duplicate registrations.
@outputSchemaFunction(squareSchema),
def square(number):
return (number * number)
@schemaFunction(square)
def squareSchema(input):
return input
Thanks.
Xuting
> NullPointerException when I have multiple python udfs
> -----------------------------------------------------
>
> Key: PIG-2404
> URL: https://issues.apache.org/jira/browse/PIG-2404
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.8.1, 0.9.1
> Reporter: Vivek Padmanabhan
> Assignee: xuting zhao
> Fix For: 0.9.2
>
>
> When I have multiple python udfs registered, the script fails at compile
> phase while trying to get the udf ouputschema.
> {code}
> register 'a.py' using org.apache.pig.scripting.jython.JythonScriptEngine as
> a_func;
> register 'b.py' using org.apache.pig.scripting.jython.JythonScriptEngine as
> b_func;
> a = load 'i1' as (f1:chararray);
> b = foreach a generate a_func.helloworld(), b_func.square(3);
> dump b;
> {code}
> a.py
> {code}
> @outputSchema("word:chararray")
> def helloworld():
> return 'Hello, World'
> {code}
> b.py
> {code}
> @outputSchemaFunction("squareSchema")
> def square(num):
> return ((num)*(num))
> {code}
> Moreover , in the log we can see duplicate and incorrect registration of udfs
> which I believe the cause for the script failure.
> INFO org.apache.pig.scripting.jython.JythonScriptEngine - Register scripting
> UDF: a_func.helloworld
> INFO org.apache.pig.scripting.jython.JythonScriptEngine - Register scripting
> UDF: b_func.square
> INFO org.apache.pig.scripting.jython.JythonScriptEngine - Register scripting
> UDF: b_func.helloworld
> This issue is observed in 0.9,0.8 and in trunk also.
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