[logback-dev] MDC/ThreadLocal not being cleared properely?

Marcel Stör marcel at frightanic.com
Mon Oct 18 12:57:18 CEST 2010

I'm wondering whether slf4j/logback (potentially) suffers from the same 
problems as log4j:


I'd switch from slf4j/log4j to slf4j/logback if this solved the issue.

If you don't want to go through the above referenced posts...
According to Tomcat's (>=6.0.24) "memory leak detection" listener the 
log4j MDC has a memory leak: "A web application created a ThreadLocal 
with key of type (...) and a value of type (...) but failed to remove it 
when the web application was stopped." That's because log4j doesn't 
provide something like ThreadLocal#remove.


Marcel Stör, http://www.frightanic.com
Couchsurfing: http://www.couchsurfing.com/people/marcelstoer
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