Hi Bob,

I'm making a wild guess:
Is it possible that your custom appender is using loggingEvent.getMessage() instead of loggingEvent.getFormattedMessage()?

Cheers,
Joern.

On 21.09.2010, at 15:39, Bob DeRemer wrote:

Hi Logback community,
 
We created a custom appender to send logging data to our own storage medium.  It extends AppenderBase<ILoggingEvent> like the docs say, but for some reason, any logging statements where we use the logback parameter substitution (i.e. “message with parameter {}”, param1), there is no substitution.  We have our custom appender AND a FileAppender.  The fileappender has the parameter substituted, but the custom one does not. 
 
If anyone has any suggestions, I would greatly appreciate.
 
Thanks,
 
Bob DeRemer
Senior Director, Architecture and Development
 
O: 717.505.7923
M: 717.881.3986
 
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