> Btw: Why not just use the rolling file appender?
The rolling file appender is fine, but what do you use for the file name? The common answer would be something date based. However, when the appdomain rollover occurs you'll have two running appdomains that both want to write to 2008-02-27.log for a short period of time. This is where the problem occurs. -Walden -- Walden H Leverich III Tech Software (516) 627-3800 x3051 [EMAIL PROTECTED] http://www.TechSoftInc.com <BLOCKED::blocked::http://www.techsoftinc.com/> Quiquid latine dictum sit altum viditur. (Whatever is said in Latin seems profound.)