This is all I got during the run. What does it mean? Now I have to debug line by line. Any hint is greatly appreciated.
2011-12-05 17:28:01,854 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 2000: Error processing rule ColumnMapKeyPrune. Try -t ColumnMapKeyPrune Details at logfile: /home/ayon/pig_1323134879161.log $ cat pig_1323134879161.log Pig Stack Trace --------------- ERROR 2000: Error processing rule ColumnMapKeyPrune. Try -t ColumnMapKeyPrune org.apache.pig.impl.logicalLayer.FrontendException: ERROR 2000: Error processing rule ColumnMapKeyPrune. Try -t ColumnMapKeyPrune at org.apache.pig.newplan.optimizer.PlanOptimizer.optimize(PlanOptimizer.java:122) at org.apache.pig.backend.hadoop.executionengine.HExecutionEngine.compile(HExecutionEngine.java:281) at org.apache.pig.PigServer.compilePp(PigServer.java:1360) at org.apache.pig.PigServer.executeCompiledLogicalPlan(PigServer.java:1297) at org.apache.pig.PigServer.execute(PigServer.java:1286) at org.apache.pig.PigServer.executeBatch(PigServer.java:360) at org.apache.pig.tools.grunt.GruntParser.executeBatch(GruntParser.java:131) at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:192) at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:164) at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:81) at org.apache.pig.Main.run(Main.java:553) at org.apache.pig.Main.main(Main.java:108) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.hadoop.util.RunJar.main(RunJar.java:156) Caused by: java.util.ConcurrentModificationException at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372) at java.util.AbstractList$Itr.next(AbstractList.java:343) at org.apache.pig.newplan.logical.rules.ColumnPruneVisitor.removeSubTree(ColumnPruneVisitor.java:441) at org.apache.pig.newplan.logical.rules.ColumnPruneVisitor.visit(ColumnPruneVisitor.java:421) at org.apache.pig.newplan.logical.relational.LOForEach.accept(LOForEach.java:74) at org.apache.pig.newplan.ReverseDependencyOrderWalker.walk(ReverseDependencyOrderWalker.java:70) at org.apache.pig.newplan.PlanVisitor.visit(PlanVisitor.java:50) at org.apache.pig.newplan.logical.rules.ColumnMapKeyPrune$ColumnMapKeyPruneTransformer.transform(ColumnMapKeyPrune.java:141) at org.apache.pig.newplan.optimizer.PlanOptimizer.optimize(PlanOptimizer.java:110) ... 16 more ================================================================================ -Ayon See My Photos on Flickr Also check out my Blog for answers to commonly asked questions.
