Hi Shawn, Every time we throw an Exception with 'could not instantiate ..' error message, we also pass down the real exception instance, this might be able to point to the reason why we fail in this scenario. Can you provide details of your exception message from the log?
The way this works is, when you register the myudf.py script we register all the function names inside script to pig and when we use these functions, we parse and construct them with JythonFunction constructor. Thanks, Aniket On Fri, April 1, 2011 12:06 pm, Xiaomeng Wan wrote: > Hi Aniket, > > > We put both jython.jar and myudf.py in classpath and also register > jython.jar in our pig script. It worked well before the upgrading, only > failed after. > > Regards, > Shawn > > > On Thu, Mar 31, 2011 at 4:38 PM, Aniket Mokashi <amoka...@andrew.cmu.edu> > wrote: > >> I think this might be because when you start in hadoop mode, your >> classpath configuration does not have jython.jar. Can you put that >> explicitly in classpath and check it out? >> >> Thanks, >> Aniket >> >> >> On Thu, March 31, 2011 6:07 pm, Xiaomeng Wan wrote: >> >>> Hi, >>> We recently updated our hadoop from CDH2 to CDH3b4, and had problems >>> using some old python udfs. Runing in local mode still works, but in >>> hadoop mode, it gives errors like "could not instantiate >>> 'org.apache.pig.scripting.jython.JythonFunction' with arguments...". >>> Anyone see similar error with python udf on this hadoop distribution? >>> We are using pig 0.8.0. Thanks! >>> >>> >>> >>> Regards >>> Shawn >>> >>> >>> >>> >> >> >> > >
