-bash-3.2$ cat pig_1364520820930.log
Backend error message
---------------------
org.apache.pig.backend.executionengine.ExecException: ERROR 2055: Received Error while processing the map plan: 'langid_command_line.py ' failed with exit status: 1
	at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.runPipeline(PigMapBase.java:265)
	at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.map(PigMapBase.java:232)
	at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.map(PigMapBase.java:53)
	at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144)
	at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:647)
	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:323)
	at org.apache.hadoop.mapred.Child$4.run(Child.java:270)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:396)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1157)
	at org.apache.hadoop.mapred.Child.main(Child.java:264)

Pig Stack Trace
---------------
ERROR 2997: Unable to recreate exception from backed error: org.apache.pig.backend.executionengine.ExecException: ERROR 2055: Received Error while processing the map plan: 'langid_command_line.py ' failed with exit status: 1

org.apache.pig.backend.executionengine.ExecException: ERROR 2997: Unable to recreate exception from backed error: org.apache.pig.backend.executionengine.ExecException: ERROR 2055: Received Error while processing the map plan: 'langid_command_line.py ' failed with exit status: 1
	at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.Launcher.getErrorMessages(Launcher.java:221)
	at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.Launcher.getStats(Launcher.java:151)
	at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher.launchPig(MapReduceLauncher.java:337)
	at org.apache.pig.backend.hadoop.executionengine.HExecutionEngine.execute(HExecutionEngine.java:382)
	at org.apache.pig.PigServer.executeCompiledLogicalPlan(PigServer.java:1209)
	at org.apache.pig.PigServer.execute(PigServer.java:1201)
	at org.apache.pig.PigServer.access$100(PigServer.java:129)
	at org.apache.pig.PigServer$Graph.execute(PigServer.java:1528)
	at org.apache.pig.PigServer.executeBatchEx(PigServer.java:373)
	at org.apache.pig.PigServer.executeBatch(PigServer.java:340)
	at org.apache.pig.tools.grunt.GruntParser.executeBatch(GruntParser.java:115)
	at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:172)
	at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:144)
	at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:90)
	at org.apache.pig.Main.run(Main.java:500)
	at org.apache.pig.Main.main(Main.java:107)
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