echo $PIG_CLASSPATH /home/jcoveney/usefulpig/conf:/home/jcoveney/jython/***
same error 2010-12-29 16:59:29,862 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 2998: Unhandled internal error. Could not initialize class org.apache.pig.scripting.jython.JythonScriptEngine$Interpreter :S I really love that UDF's can be written in python...thanks for helping me try to get there. 2010/12/29 Dmitriy Ryaboy <[email protected]> > You need to set the classpath to include the literal jar strings, not just > the directory that contains them. > Try, /home/jcoveney/usefulpig/conf:/home/jcoveney/jython/*** > > D > > On Wed, Dec 29, 2010 at 11:32 AM, Jonathan Coveney <[email protected] > >wrote: > > > Ok, strangely enough, it won't run locally either... it sees the file, > but > > it's giving me an interpreter not found error, so it must be something > > else. > > > > PIG_CLASSPATH is equal > > to /home/jcoveney/usefulpig/conf:/home/jcoveney/jython > > and here is my test script > > > > register '/home/jcoveney/udfs/pytest.py' using jython as comp; > > > > the_in = LOAD 'input.txt' AS (thing:chararray); > > the_out = FOREACH the_out GENERATE comp.computation(thing) > > DUMP theout; > > > > but I don't think it's getting that far... it's still giving me the same > > error. I'm just running it "pig -x local script.pig" > > > > > > 2010/12/29 Jonathan Coveney <[email protected]> > > > > > Ah, that might be it... my computer has it and I have it on my path, > > > however, I do not know if the cluster has it... definitely something to > > look > > > into. thanks. > > > > > > > > > 2010/12/29 [email protected] <[email protected]> > > > > > >> try adding the full path to the jar via PIG_CLASSPATH like so: > > >> > > >> export PIG_CLASSPATH=/path/to/jython.jar > > >> > > >> then run pig. Also, I assume your doing your testing on a local > machine? > > >> if > > >> it's on a cluster, you need to make sure jython is on all the worker > > nodes > > >> and classpath is setup properly on all of them as well. > > >> > > >> On Wed, Dec 29, 2010 at 9:57 AM, Jonathan Coveney <[email protected] > > >> >wrote: > > >> > > >> > I do have Jython installed and on PATH, but maybe I didn't include > it > > in > > >> > the > > >> > right way? Where does it need to be? > > >> > > > >> > 2010/12/29 [email protected] <[email protected]> > > >> > > > >> > > Do you have Jython on your classpath? Currently Jython isn't > > >> distributed > > >> > in > > >> > > the 0.8.0 release tarball. > > >> > > > > >> > > On Mon, Dec 27, 2010 at 7:18 PM, Jonathan Coveney < > > [email protected] > > >> > > >wrote: > > >> > > > > >> > > > Oh and just to be sure, I have tried > > >> > > > @outputSchema("word:chararray") > > >> > > > @outputSchema("x:{t:(word:chararray)}") > > >> > > > as well (the former of which seems to be the "right" one, > whenever > > I > > >> > can > > >> > > > figure out what is wrong) > > >> > > > > > >> > > > I've tested my code separately in python and it is fine... > > >> > > > > > >> > > > 2010/12/28 Jonathan Coveney <[email protected]> > > >> > > > > > >> > > > > Aniket, I appreciate you taking a look at this. In general, I > > >> found > > >> > the > > >> > > > > documentation around outputSchema pretty confusing... for > > example, > > >> in > > >> > > > this > > >> > > > > example > > >> > > > > > > >> > > > > @outputSchema("x:{t:(word:chararray)}") > > >> > > > > def helloworld(): > > >> > > > > return ('Hello, World') > > >> > > > > > > >> > > > > > > >> > > > > Then, in the sample script below that, you have > > >> > > > > > > >> > > > > @outputSchema("t:(numformat:chararray)") > > >> > > > > def commaFormat(num): > > >> > > > > return '{:,}'.format(num) > > >> > > > > > > >> > > > > In this case, you have lost the x:{} (which makes more sense > to > > >> me. > > >> > > > > > > >> > > > > Perhaps this is because the latter function is meant to > operate > > on > > >> an > > >> > > > input > > >> > > > > and return a type (t), whereas the hello world function should > > be > > >> > able > > >> > > to > > >> > > > > stand alone, and thus, has to return a bag? Not sure... > > >> > > > > > > >> > > > > Besides that, though, I changed my code per your suggestion > and > > >> tried > > >> > > > > > > >> > > > > @outputSchema("t:(word:chararray)") > > >> > > > > > > >> > > > > and still got the error. > > >> > > > > > > >> > > > > As a note, do I need to import anything in the python script > for > > >> > > > > outputSchema to work, or should it be fine since pig is > grabbing > > >> it? > > >> > > > > > > >> > > > > Once again, I really appreciate your help in the matter. I > feel > > >> > having > > >> > > > > people who weren't intimately related to the project have a go > > at > > >> it > > >> > is > > >> > > > how > > >> > > > > you make it ultimately more usable and useful...but you have > to > > >> > answer > > >> > > > some > > >> > > > > annoying questions on the way :P > > >> > > > > > > >> > > > > Thanks again. > > >> > > > > > > >> > > > > 2010/12/28 Aniket Mokashi <[email protected]> > > >> > > > > > > >> > > > > I think decorator used here is incorrect. > > >> > > > >> In general, "output:chararray" needs to be > > >> schema-string-compatible. > > >> > > > Also, > > >> > > > >> you are using "outputSchemaFunction", which is used in case > you > > >> want > > >> > > to > > >> > > > >> write a udf that has output schema dependent on input schema > > (ęg > > >> > > > -square) > > >> > > > >> and this should have a function with decorator > "schemaFunction" > > >> > (named > > >> > > > >> "output" in your case). I think using "outputSchema" > decorator > > >> would > > >> > > fix > > >> > > > >> the problem here. > > >> > > > >> > > >> > > > >> More details can be found at- > > >> > > > >> http://wiki.apache.org/pig/UDFsUsingScriptingLanguages > > >> > > > >> > > >> > > > >> Thanks, > > >> > > > >> Aniket > > >> > > > >> > > >> > > > >> On Mon, December 27, 2010 4:30 pm, Jonathan Coveney wrote: > > >> > > > >> > so I have module.py, and I want to be able to use it in a > pig > > >> > > script. > > >> > > > It > > >> > > > >> > has no special imports or anything. I do have > > >> > > > >> > @outputSchemaFunction("output:chararray) > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > In my pig script, I have this > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > register '/my/udf/location/udf.py' using jython as myfunc; > > >> > > > >> > > > >> > > > >> > is there any reason why this wouldn't work? here is the > error > > I > > >> > get: > > >> > > > >> > > > >> > > > >> > 2010-12-27 16:29:41,288 [main] ERROR > > >> > > org.apache.pig.tools.grunt.Grunt > > >> > > > - > > >> > > > >> > ERROR 2998: Unhandled internal error. > > >> > > > org/python/util/PythonInterpreter > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > Not the most instructive error, but is there anything more > I > > >> need > > >> > to > > >> > > > be > > >> > > > >> > doing to be able to use a python UDF? > > >> > > > >> > > > >> > > > >> > As an aside, are simply python UDF's as efficient as Java > > ones? > > >> I > > >> > > like > > >> > > > >> > Python a lot and love the idea of being able to UDF in it, > > but > > >> can > > >> > > use > > >> > > > >> > java if necessary. > > >> > > > >> > > > >> > > > >> > > >> > > > >> > > >> > > > >> > > >> > > > > > > >> > > > > > >> > > > > >> > > > > >> > > > > >> > > -- > > >> > > http://about.me/soren/bio > > >> > > > > >> > > > >> > > >> > > >> > > >> -- > > >> http://about.me/soren/bio > > >> > > > > > > > > >
