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From "Zheng Shao (JIRA)" <>
Subject [jira] Commented: (HIVE-1032) Better Error Messages for Execution Errors
Date Thu, 04 Feb 2010 17:30:28 GMT


Zheng Shao commented on HIVE-1032:

Talked with Namit offline some time ago about this issue.
Let's remove the "isMapTask" flag from the constructor.

> Better Error Messages for Execution Errors
> ------------------------------------------
>                 Key: HIVE-1032
>                 URL:
>             Project: Hadoop Hive
>          Issue Type: New Feature
>          Components: Query Processor
>            Reporter: Paul Yang
>            Assignee: Paul Yang
>         Attachments: HIVE-1032.1.patch, HIVE-1032.2.patch, HIVE-1032.3.patch
> Three common errors that occur during execution are:
> 1. Map-side group-by causing an out of memory exception due to large aggregation hash
> 2. ScriptOperator failing due to the user's script throwing an exception or otherwise
returning a non-zero error code
> 3. Incorrectly specifying the join order of small and large tables, causing the large
table to be loaded into memory and producing an out of memory exception.
> These errors are typically discovered by manually examining the error log files of the
failed task. This task proposes to create a feature that would automatically read the error
logs and output a probable cause and solution to the command line.

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