Debugging shared library slow waiting on some large transfer

I can step through my main process just fine but as I step through my shared library, on entry to each new file it takes a long time to respond, maybe 20 seconds. Meanwhile Wireshark shows some large transfer on TCP port 2345. As soon as the transfer completes I get a response in Eclipse and I’m free to make the next action. Once I return to this source file it steps just fine. It only occurs as I step into a file I had not yet stepped through during the debugging session. Also, breakpoints don’t seem to resolve, and during start up I get “No source file named my_file.cpp” but it actually works, pretty consistently now.