[logback-user] Inconsistency in printing Throwable instances?

[Abraham Lin]

Hi Ceki,

Thanks for looking into this. I've created an issue in JIRA:
http://jira.qos.ch/browse/LOGBACK-722

-Abraham


On Mon, Jul 16, 2012 at 5:44 PM, ceki <ceki at qos.ch> wrote:

>
> I think this is a bug in ThrowableProxy. Could you please create a jira
> issue for this? Thank you.
>
>
> On 16.07.2012 23:24, Abraham Lin wrote:
>
>> Hi Ceki,
>>
>> Thanks for the response. Here's a trivial example:
>>
>>    public class Main {
>>      public static void main( String[] args ) {
>>        org.slf4j.Logger logger = org.slf4j.LoggerFactory
>>            .getLogger( Main.class );
>>        Exception e1 = new CustomException( );
>>        e1.printStackTrace( System.out );
>> logger.info <http://logger.info>( "", e1 );
>>
>>        System.out.println( );
>>        Exception e2 = new CustomException( "Test message" );
>>        e2.printStackTrace( System.out );
>> logger.info <http://logger.info>( "", e2 );
>>
>>      }
>>      static class CustomException extends Exception {
>>        CustomException( ) {}
>>        CustomException( String message ) { super( message ); }
>>        @Override
>>        public String toString( ) {
>>          return super.toString( ) + " (from toString)";
>>        }
>>      }
>>    }
>>
>> Running the above yields this output:
>>
>>    com.example.logback.Main$**CustomException (from toString)
>>      at com.example.logback.Main.main(**Main.java:7)
>>    17:19:50.445 [main] INFO  com.example.logback.Main -
>>    com.example.logback.Main$**CustomException: null
>>      at com.example.logback.Main.main(**Main.java:7) ~[classes/:na]
>>    com.example.logback.Main$**CustomException: Test message (from
>> toString)
>>      at com.example.logback.Main.main(**Main.java:13)
>>    17:19:50.451 [main] INFO  com.example.logback.Main -
>>    com.example.logback.Main$**CustomException: Test message
>>      at com.example.logback.Main.main(**Main.java:13) ~[classes/:na]
>>
>> What do you think?
>>
>> -Abraham
>>
>>
>> On Mon, Jul 16, 2012 at 5:02 PM, ceki <ceki at qos.ch <mailto:ceki at qos.ch>>
>>
>> wrote:
>>
>>     Hi Abraham,
>>
>>     Can you provide an example of the difference?
>>     --
>>     Ceki
>>     http://tinyurl.com/proLogback
>>
>>
>>     On 16.07.2012 22:32, Abraham Lin wrote:
>>
>>         Hi,
>>
>>         In comparing the outputs of Throwable#printStackTrace and
>> logback, I
>>         found an inconsistency in how the Throwable instances are
>>         printed. While
>>         the former delegates to the Throwable instance's #toString
>>         method, the
>>         latter (partially) re-implements the default implementation in
>>         Throwable, which means that data contained in the #toString
>>         methods of
>>         Throwable subclasses is discarded. While this is easy to work
>>         around in
>>         my own code, there is still a problem when working with
>> third-party
>>         libraries.
>>
>>         Is there a configuration option that would allow me to specify
>>         my own
>>         IThrowableProxy implementation? (I couldn't find any pages
>>         describing
>>         the extension points and how to activate them.) Or would it be
>> more
>>         appropriate to modify the ThrowableProxyUtil class so that it
>>         behaves
>>         similarly to #printStackTrace? Any ideas would be greatly
>>         appreciated.
>>
>>         Thanks in advance!
>>
>>         -Abraham
>>
>>
>>
>>
>
> --
> Ceki
> http://tinyurl.com/proLogback
>
>
>
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