Can you: 1. provide source code 2. provide stacktrace I've seen smilar stacktrace with could not instantiate 'my.pig.stuff.SomeClass' with arguments 'null', sbut the root cause was: 2.1. missing jar with class used in UDF/Load func 2.2. not correcntly handled exception.
2014-01-26 [email protected] <[email protected]> > I write a simple LOAD UDF according to the link and packaged it in the > jar. > > register tracking-0.0.1-SNAPSHOT.jar; > DEFINE PvDataLoader com.agrantsem.tracking.hadoop.udf.PvDataLoader(); > data = LOAD > '/user/tracking/pv/log/hourly/[email protected]' > USING PvDataLoader(); > dump data; > > pig script failed to validate: java.lang.RuntimeException: could not > instantiate 'com.agrantsem.tracking.hadoop.udf.PvDataLoader' with arguments > 'null' > at > org.apache.pig.parser.LogicalPlanBuilder.buildLoadOp(LogicalPlanBuilder.java:835) > at > org.apache.pig.parser.LogicalPlanGenerator.load_clause(LogicalPlanGenerator.java:3236) > at > org.apache.pig.parser.LogicalPlanGenerator.op_clause(LogicalPlanGenerator.java:1315) > at > org.apache.pig.parser.LogicalPlanGenerator.general_statement(LogicalPlanGenerator.java:799) > at > org.apache.pig.parser.LogicalPlanGenerator.statement(LogicalPlanGenerator.java:517) > at > org.apache.pig.parser.LogicalPlanGenerator.query(LogicalPlanGenerator.java:392) > at > org.apache.pig.parser.QueryParserDriver.parse(QueryParserDriver.java:184) > > However, there's no arguments in my udf． > Any insight？ > > Thanks, > Lei > > > > > [email protected] > > From: Serega Sheypak > Date: 2014-01-26 20:04 > To: user > Subject: Re: How to wrie the user custemed Load Funtion > Try to use this one as start point: > > https://svn.apache.org/repos/asf/pig/trunk/src/org/apache/pig/builtin/PigStorage.java > > > 2014-01-26 [email protected] <[email protected]> > > > > > Hi， > > Ｉ want to parse some text file data compressed with .gz format. The > > data is not neat. The seperator is not uniq and some records are not > > imcomplete. > > Anyone can give an examle of how to write the pig Load UDF? > > > > Thanks, > > Lei > > > > > > > > > > [email protected] >
