GitHub user kevinjmh opened a pull request:

    https://github.com/apache/carbondata/pull/2878

    [WIP] Modification of error/exception for better debugging

    Changes in this PR follows these rules: 
    
                        
    | Code Case        | Problem   |  Suggest Modification  |
    | --------   | -----:  | :----:  |
    | `LOGGER.error(e);`     | no stack trace |   `LOGGER.error(e.getMessage(), 
e);`     |
    | `LOGGER.error(e.getMessage());`     | no stack trace |   
`LOGGER.error(e.getMessage(), e);`     |
    | `catch ... throw new Exception("Error occur")`        |    useless 
message, no stack trace    |  `throw new Exception(e)`  |
    | `catch ... throw new Exception(e.getMessage())`        |    no stack 
trace    |  `throw new Exception(e)`  |
    | `catch ... throw new Exception(e.getMessage(), e)`        |   no need to 
call `getMessage()`   |   `throw new Exception(e)`   |
    | `catch ... throw new Exception("Error occur: " + e.getMessage(), e)`      
  |    useless message    |  `throw new Exception(e)`  |
    | `catch ... throw new Exception("DataLoad fail: " + e.getMessage())`       
 |    no stack trace    |  `throw new Exception("DataLoad fail: " + 
e.getMessage(), e)`  |
    
    Some exceptions, such as MalformedCarbonCommandException, 
InterruptException, NumberFormatException, InvalidLoadOptionException and 
NoRetryException, do not have Constructor using `Throwable`, so we do not 
change it
    
    
    Be sure to do all of the following checklist to help us incorporate 
    your contribution quickly and easily:
    
     - [ ] Any interfaces changed?
     
     - [ ] Any backward compatibility impacted?
     
     - [ ] Document update required?
    
     - [ ] Testing done
            Please provide details on 
            - Whether new unit test cases have been added or why no new tests 
are required?
            - How it is tested? Please attach test report.
            - Is it a performance related change? Please attach the performance 
test report.
            - Any additional information to help reviewers in testing this 
change.
           
     - [ ] For large changes, please consider breaking it into sub-tasks under 
an umbrella JIRA. 
    


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/kevinjmh/carbondata error_exception

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/carbondata/pull/2878.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #2878
    
----
commit 78792ba19a0b09ca025818907777e708ca0ce4cc
Author: Manhua <kevinjmh@...>
Date:   2018-10-30T01:44:59Z

    LOGGER.error(e); ==> LOGGER.error(e.getMessage(), e);

commit 4a7c58cab1f30178003e55b47978daf8d474fb31
Author: Manhua <kevinjmh@...>
Date:   2018-10-30T01:48:33Z

    LOGGER.error(e.getMessage()); ==> LOGGER.error(e.getMessage(), e);

commit dd42cba52500725265fbb0577702c79c2d138f6f
Author: Manhua <kevinjmh@...>
Date:   2018-10-30T01:50:24Z

    LOG.error(e); ==> LOG.error(e.getMessage(), e);

commit b8716e8d33c7535d1698409bd91802f27d72890d
Author: Manhua <kevinjmh@...>
Date:   2018-10-30T02:01:29Z

    Exception(e.getMessage(), e); ==> Exception(e);

commit f137aa7da667dcbfe867b5c83ebd6735b8c5f0f1
Author: Manhua <kevinjmh@...>
Date:   2018-10-30T02:09:31Z

    Exception(e.getMessage()); ==> Exception(e);

commit da0df82a9a43f54f7cf7072a4c3497a731ca261a
Author: Manhua <kevinjmh@...>
Date:   2018-10-30T02:18:37Z

     + e.getMessage()); ==>  + e.getMessage(), e);

commit 4c1ecaf636391327a57621721e2a5318fb8cc11f
Author: Manhua <kevinjmh@...>
Date:   2018-10-30T02:36:17Z

    fix style

commit 26fa06c96aeaa7418424df6f5089315d95cfadbb
Author: Manhua <kevinjmh@...>
Date:   2018-10-30T02:53:22Z

    some more fix for .getMessage()

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