It might be a good idea to mark some additional packages imported by logback-classis bundle as optional. Namely this applies to packages

javax.servlet,
javax.servlet.http,
javax.management

By importing package javax.servlet you are forcing the users to deploy Sevlet API bundle even in non-web application environment.

The current <Import-Package> declaration in maven-bundle-plugin configuration:

<Import-Package>sun.reflect;resolution:=optional,
javax.jms;resolution:=optional,
*
</Import-Package>

Suggested update:

<Import-Package>sun.reflect;resolution:=optional,
javax.jms;resolution:=optional,
javax.servlet.*;resolution:=optional,
javax.management;resolution:=optional,
*
</Import-Package>

Feel free to close this as invalid if the above mentioned packages are always required for correct operation of logback-classic.