You need to grab the full stack from the Hadoop WebUI. Without the stack, I have very little clue.
Daniel On 5/15/15, 2:01 PM, "Ankur Kasliwal" <ankur.kasliwal...@gmail.com> wrote: >Hi All, > > > >I am trying to process sequence file using Pig. > >Sequence file is provided as input to pig script. > >A UDF is written which basically does the processing of meta data and >actual file data. > >This UDF returns input sequence file in form of tuples (metadata, actual >file ) as output. > > > >This is working fine on Hadoop : > >· Hadoop : 1.0.3-gphd-1.2.0.0 and > >· pig version : Apache Pig version 0.9.2-gphd-1.2.0.0 > > > >But when I am trying to run same on following version of Hadoop and pig it >is failing with error as below: > > > >· Hadoop : Hadoop 2.2.0-gphd-3.1.0.0 > >· Pig version : Apache Pig version 0.12.0-gphd-3.1.0.0 > > > >Error: > > > >Pig Stack Trace > >--------------- > >ERROR 1066: Unable to open iterator for alias limited. Backend error : >Exception while executing [POUserFunc (Name: >POUserFunc(com.company.bigdata.serde.Deserializer)[tuple] - scope-3 >Operator Key: scope-3) children: null at []]: >java.lang.NullPointerException > > > >org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable to >open iterator for alias limited. Backend error : Exception while executing >[POUserFunc (Name: >POUserFunc(com.company.bigdata.serde.Deserializer)[tuple] - scope-3 >Operator Key: scope-3) children: null at []]: >java.lang.NullPointerException > > > >Any pointers on this will be helpful. > >I can see several posts on similar issue by many people on google but no >posted solution. > > > >Thanks, > >Ankur
