[jira] Created: (MAPREDUCE-2074) Task should fail when symlink creation fail

["Koji Noguchi (JIRA)" <ji...@apache.org>]

Task should fail when symlink creation fail
-------------------------------------------

                 Key: MAPREDUCE-2074
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2074
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: distributed-cache
    Affects Versions: 0.20.2
            Reporter: Koji Noguchi
            Priority: Minor
             Fix For: 0.22.0


If I pass an invalid symlink as   -Dmapred.cache.files=/user/knoguchi/onerecord.txt#abc/abc

Task only reports a WARN and goes on.

{noformat} 
2010-09-16 21:38:49,782 INFO org.apache.hadoop.mapred.TaskRunner: Creating symlink: /0/tmp/mapred-local/taskTracker/knoguchi/distcache/-5031501808205559510_-128488332_1354038698/abc-nn1.def.com/user/knoguchi/onerecord.txt <- /0/tmp/mapred-local/taskTracker/knoguchi/jobcache/job_201008310107_15105/attempt_201008310107_15105_m_000000_0/work/./abc/abc
2010-09-16 21:38:49,789 WARN org.apache.hadoop.mapred.TaskRunner: Failed to create symlink: /0/tmp/mapred-local/taskTracker/knoguchi/distcache/-5031501808205559510_-128488332_1354038698/abc-nn1.def.com/user/knoguchi/onerecord.txt <- /0/tmp/mapred-local/taskTracker/knoguchi/jobcache/job_201008310107_15105/attempt_201008310107_15105_m_000000_0/work/./abc/abc
{noformat} 

I believe we should fail the task at this point.

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