[PIG-736] Inconsistent error message when the message should be about org.apache.hadoop.fs.permission.AccessControlException: Permission denied:

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.3.0
• Fix Version/s: 0.7.0
• Assignee: Unassigned
• Reporter: Viraj Bhat
• Created: 26/Mar/09 00:16
• Updated: 08/Jul/10 20:27
• Resolved: 08/Jul/10 20:27

Description

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

%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;

The error message we get is:
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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
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This message is definitely hard to debug

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

• is blocked by: PIG-728 All backend error messages must be logged to preserve the original error messages