Inconsistent error message when the message should be about 
org.apache.hadoop.fs.permission.AccessControlException: Permission denied:
--------------------------------------------------------------------------------------------------------------------------------------

                 Key: PIG-736
                 URL: https://issues.apache.org/jira/browse/PIG-736
             Project: Pig
          Issue Type: Bug
    Affects Versions: 1.0.1
            Reporter: Viraj Bhat
             Fix For: 1.0.1


Suppose I have Pig script which accesses a directory in HDFS for which I do not 
have permissions

shell> hadoop fs -ls /mydata/group_permissions/

drwxr-x---   - groupuser restrictedgroup          0 2009-03-24 10:58 
/mydata/group_permissions/20090323

{code}

%default dates_to_process '20090323'

MYDATA = load '/mydata/group_permissions/{$dates_to_process}*' using
PigStorage() as (col1,col2,col3) ;

MYDATA_PROJECT = foreach MYDATA generate
        (chararray) col1#'acct' as acct,
        (int)col1#'country' as country,
        (int)col1#'product' as product

dump MYDATA_PROJECT;

{code}

The error message we get is:
===============================================================================================
2009-03-26 00:00:05,753 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 
2099: Problem in constructing slices.
Details at logfile: /home/viraj/pig_1238025596328.log
===============================================================================================
This message is definitely hard to debug

===============================================================================================
With the previous version 1.0.0 I get the following error message, which is 
more appropriate to this case.
===============================================================================================

2009-03-26 00:01:41,787 [main] ERROR 
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher 
- java.io.IOException: org.apache.hadoop.fs.permission.AccessControlException: 
Permission denied: user=viraj, access=READ_EXECUTE, 
inode="20090323":groupuser:restrictedgroup:rwxr-x--- 
[org.apache.hadoop.fs.permission.AccessControlException: Permission denied: 
user=viraj, access=READ_EXECUTE, 
inode="20090323":groupuser:restrictedgroup:rwxr-x---]
        at 
org.apache.pig.backend.hadoop.datastorage.HDirectory.iterator(HDirectory.java:157)
        at 
org.apache.pig.backend.executionengine.PigSlicer.slice(PigSlicer.java:77)
        at 
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigInputFormat.getSplits(PigInputFormat.java:206)
        at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:742)
        at org.apache.hadoop.mapred.jobcontrol.Job.submit(Job.java:370)
        at 
org.apache.hadoop.mapred.jobcontrol.JobControl.startReadyJobs(JobControl.java:247)
        at 
org.apache.hadoop.mapred.jobcontrol.JobControl.run(JobControl.java:279)
        at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.RuntimeException: 
org.apache.hadoop.fs.permission.AccessControlException: Permission denied: 
user=viraj, access=READ_EXECUTE, 
inode="20090323":groupuser:restrictedgroup:rwxr-x---
        ... 8 more

2009-03-26 00:01:41,798 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 
1066: Unable to open iterator for alias MYDATA_PROJECT
Details at logfile:  /home/viraj/pig_1238025692361.log

===============================================================================================




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