Having held a conversation with BKBK and given them a deeper insight in to how my application is structured and works, the issue of the GC Overhead Limit being exceeded is still requiring tackled.
The functionality of the app works very well whilst there is memory available and the cfthreads are required to allow the accounts to search synchronously.
The question at hand here is how can I go about implementing a solution that ensures the JVM does not run out of memory?