[jira] Created: (HIVE-1921) Better error message when a non-essential job fails

["Paul Yang (JIRA)" <ji...@apache.org>]

Better error message when a non-essential job fails
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                 Key: HIVE-1921
                 URL: https://issues.apache.org/jira/browse/HIVE-1921
             Project: Hive
          Issue Type: Improvement
          Components: CLI
    Affects Versions: 0.7.0
            Reporter: Paul Yang
            Assignee: Paul Yang
            Priority: Minor


To determine whether a join can be converted into a map-join, a task is launched to determine memory requirements. If the task fails, then a normal join must be performed. This is not an error but the user sees a message like:

{code}

...
2011-01-19 02:48:51     Processing rows:        1800000 Hashtable size: 1799999 Memory usage:   818546352       rate:   0.789
2011-01-19 02:48:57     Processing rows:        1900000 Hashtable size: 1899999 Memory usage:   861746352       rate:   0.831
2011-01-19 02:49:05     Processing rows:        2000000 Hashtable size: 1999999 Memory usage:   904921384       rate:   0.873
2011-01-19 02:49:12     Processing rows:        2100000 Hashtable size: 2099999 Memory usage:   952382416       rate:   0.918
FAILED: Execution Error, return code 2 from org.apache.hadoop.hive.ql.exec.MapredLocalTask
ATTEMPT: Execute BackupTask: org.apache.hadoop.hive.ql.exec.MapRedTask
Launching Job 2 out of 2
...
{code}

The wording makes it seem as if something went wrong, which is not necessarily the case.

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