We have implemented a REL tag handler for our Tridion 2011 content delivery server. The REL tag handler has to do some specific functionality when resolving component & page links.
This REL handler is working as it should when using some hardcoded values, but from the moment we include a call to another class responsible to get these values from a properties file (another piece of code from the customer's project), IIS throws an error when the REL handler is called.
The problem is this error is not very clear - it just states something went wrong and we need to check the server logs (but the logs don't show anything that might point us to the right direction).
We also tried to add some custom logging to the handler to see what is going wrong, but our log statements don't show up (logback.xml is set to DEBUG).
There is most likely an error with the propertyreader class, but it's hard to pin-point the problem without knowing the exact error.
Does anybody know how to get logging from a custom REL handler working, or even how to debug such a handler from Eclipse ?