[PIG-751] Inability to debug pig scripts due to ERROR 2999: "FrontendException cannot be cast to java.lang.Error" cast error

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.3.0
• Fix Version/s: 0.4.0
• Component/s: grunt
• Release Note: please, reopen if there is a reproducible case
• Assignee: Unassigned
• Reporter: Viraj Bhat
• Created: 03/Apr/09 01:04
• Updated: 25/Mar/10 00:12
• Resolved: 14/Jul/09 16:00

Description

I have an input file which is being loaded by BinStorage()

myinput = LOAD 'partfile' USING BinStorage() AS (eid:long, url:chararray, title:chararray, index:int, num_candidates:int, num_inlinks:int, inlinks);

lim_myinput = limit myinput 100;

dump lim_myinput;

I get the following error:
=========================================================================================================================================
2009-04-03 00:50:57,490 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 2999: Unexpected internal error. org.apache.pig.impl.logicalLayer.FrontendException cannot be cast to java.lang.Error
=========================================================================================================================================
ERROR 2999: Unexpected internal error. org.apache.pig.impl.logicalLayer.FrontendException cannot be cast to java.lang.Error
java.lang.ClassCastException: org.apache.pig.impl.logicalLayer.FrontendException cannot be cast to java.lang.Error
at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseExpr(QueryParser.java:1098)
at org.apache.pig.impl.logicalLayer.parser.QueryParser.Expr(QueryParser.java:804)
at org.apache.pig.impl.logicalLayer.parser.QueryParser.Parse(QueryParser.java:595)
at org.apache.pig.impl.logicalLayer.LogicalPlanBuilder.parse(LogicalPlanBuilder.java:60)
at org.apache.pig.PigServer.parseQuery(PigServer.java:311)
at org.apache.pig.PigServer.registerQuery(PigServer.java:277)
at org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:529)
at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:280)
at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:99)
at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:88)
at org.apache.pig.Main.main(Main.java:352)
=========================================================================================================================================
It seems that the error is caused during the schema creation, in BinStorage(), however this error is not reported!! If I use PigStorage() the error goes away but the results are incorrect.

myinput = LOAD 'partfile' USING PigStorage() AS (eid:long, url:chararray, title:chararray, index:int, num_candidates:int, num_inlinks:int, inlinks);

Currently it is not possible to find out where the error really occurred but to manually inspect each keyword.