jConfig

The load method of ConfigurationManager has this:

if(configurationHandler instanceof AbstractHandler) {
((AbstractHandler)configurationHandler).addFileListener(new
ConfigurationFileListener(configurationName));
}
if (config != null) {
//config.setConfigName(configurationName);
configurations.put(configurationName, config);
handlerMapping.put(configurationName, configurationHandler);
}

Since configurations is a hashmap, if the same configuration is loaded
multiple times, one will overwrite the other. That's a good thing; you
maintain just one config of given name. However, the first condition
doesn't check for that, but blindly adds a new listener every time the load
function is called. The result is that if the load method is called 10
times for the same config, you end up with 1 config (good) but 10 listeners
(bad).