Difficult to debug parameter substitution problems based on the error messages
when running in local mode
---------------------------------------------------------------------------------------------------------
Key: PIG-755
URL: https://issues.apache.org/jira/browse/PIG-755
Project: Pig
Issue Type: Bug
Components: grunt
Affects Versions: 0.3.0
Reporter: Viraj Bhat
Fix For: 0.3.0
I have a script in which I do a parameter substitution for the input file. I
have a use case where I find it difficult to debug based on the error messages
in local mode.
{code}
A = load '$infile' using PigStorage() as
(
date : chararray,
count : long,
gmean : double
);
dump A;
{code}
1) I run it in local mode with the input file in the current working directory
{code}
prompt $ java -cp pig.jar:/path/to/hadoop/conf/ org.apache.pig.Main -exectype
local -param infile='inputfile.txt' localparamsub.pig
{code}
2009-04-07 00:03:51,967 [main] ERROR
org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POStore
- Received error from storer function:
org.apache.pig.backend.executionengine.ExecException: ERROR 2081: Unable to
setup the load function.
2009-04-07 00:03:51,970 [main] INFO
org.apache.pig.backend.local.executionengine.LocalPigLauncher - Failed jobs!!
2009-04-07 00:03:51,971 [main] INFO
org.apache.pig.backend.local.executionengine.LocalPigLauncher - 1 out of 1
failed!
2009-04-07 00:03:51,974 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR
1066: Unable to open iterator for alias A
====================================================================
Details at logfile: /home/viraj/pig-svn/trunk/pig_1239062631414.log
====================================================================
ERROR 1066: Unable to open iterator for alias A
org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable to open
iterator for alias A
at org.apache.pig.PigServer.openIterator(PigServer.java:439)
at
org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:359)
at
org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:193)
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)
Caused by: java.io.IOException: Job terminated with anomalous status FAILED
at org.apache.pig.PigServer.openIterator(PigServer.java:433)
... 5 more
====================================================================
2) I run it in map reduce mode
{code}
prompt $ java -cp pig.jar:/path/to/hadoop/conf/ org.apache.pig.Main -param
infile='inputfile.txt' localparamsub.pig
{code}
2009-04-07 00:07:31,660 [main] INFO
org.apache.pig.backend.hadoop.executionengine.HExecutionEngine - Connecting to
hadoop file system at: hdfs://localhost:9000
2009-04-07 00:07:32,074 [main] INFO
org.apache.pig.backend.hadoop.executionengine.HExecutionEngine - Connecting to
map-reduce job tracker at: localhost:9001
2009-04-07 00:07:34,543 [Thread-7] WARN org.apache.hadoop.mapred.JobClient -
Use GenericOptionsParser for parsing the arguments. Applications should
implement Tool for the same.
2009-04-07 00:07:39,540 [main] INFO
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher
- 0% complete
2009-04-07 00:07:39,540 [main] ERROR
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher
- Map reduce job failed
2009-04-07 00:07:39,563 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR
2100: inputfile does not exist.
====================================================================
Details at logfile: /home/viraj/pig-svn/trunk/pig_1239062851400.log
====================================================================
ERROR 2100: inputfile does not exist.
org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable to open
iterator for alias A
at org.apache.pig.PigServer.openIterator(PigServer.java:439)
at
org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:359)
at
org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:193)
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)
Caused by: org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1002:
Unable to store alias A
at org.apache.pig.PigServer.store(PigServer.java:470)
at org.apache.pig.PigServer.openIterator(PigServer.java:427)
... 5 more
Caused by: org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1002:
Unable to store alias A
at org.apache.pig.PigServer.store(PigServer.java:503)
at org.apache.pig.PigServer.store(PigServer.java:466)
... 6 more
Caused by: org.apache.pig.backend.executionengine.ExecException: ERROR 2997:
Unable to recreate exception from backend error:
org.apache.pig.backend.executionengine.ExecException: ERROR 2100: inputfile
does not exist.
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.Launcher.getStats(Launcher.java:135)
====================================================================
Here is evident that the error occurred because "input.txt" was truncated to
"input"
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