Description
In this snippet:
_exchangeTracker = new ServiceTracker(_activator.getContext(), ExchangeType.class.getName(), null);
_exchangeTracker.open();
_securityTracker = new ServiceTracker(_activator.getContext(), ACLPlugin.class.getName(), null);
_exchangeTracker.open();
the open method is called on _exchangeTracker instead of _securityTracker. This leads to a NPE if plugin-directory is used in the config file.