The connection metadata sensor apparently does not work with the websphere application server 8.0. It seems like the access to the metadata is done in the initialization of the connection rather upon the execution and usage of it.
The exception upon the execution of the getMetaData method is:
My guess is that some state is then set wrong on the connection and thus afterwards a nullpointerexception is thrown.
We need to take a look if we can access this information later on.