https://jira.jboss.org/jira/browse/JBOSGI-140

Although a listener is associated with a bundle context (i.e. must get removed when the bundle gets uninstalled) the events must get delivered to the listeners that are associated with the framework.

sysContext.addBundleListener(listenerA);

Bundle bndA = sysContext.install("bundleA.jar");
bndA.getBundleContext()..addBundleListener(listenerB);

Bundle bndB = sysContext.install("bundleB.jar");
bndB.uninstall();

Both listenerA and listenerB must see the BundleEvents for bundleB.

This delivery pattern is the basis of the much used "Extender Pattern"