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From "Thejas M Nair (JIRA)" <j...@apache.org>
Subject [jira] Created: (PIG-1612) error reporting: PigException needs to have a way to indicate that its message is appropriate for user
Date Tue, 14 Sep 2010 20:01:33 GMT
error reporting: PigException needs to have a way to indicate that its message is appropriate
for user
------------------------------------------------------------------------------------------------------

                 Key: PIG-1612
                 URL: https://issues.apache.org/jira/browse/PIG-1612
             Project: Pig
          Issue Type: Improvement
            Reporter: Thejas M Nair
             Fix For: 0.9.0


The error message printed to the user by pig is the message from the exception that is the
'root cause' from the chain of getCause() of exception that has been thrown. But often the
'root cause' exception does not have enough context that would make for a better error message.
It should be possible for a PigException to indicate to the code that determines the error
message that its getMessage() string should be used instead of that of the 'cause' exception.

The following code in LogUtils.java is used to determine the exception that is the 'root cause'
-
{code}
    public static PigException getPigException(Throwable top) {
        Throwable current = top;
        Throwable pigException = top;

        while (current != null && current.getCause() != null){
            current = current.getCause();
            if((current instanceof PigException) && (((PigException)current).getErrorCode()
!= 0)) {
                pigException = current;
            }
        }
        return (pigException instanceof PigException? (PigException)pigException : null);
        
    }
{code}





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