Comment 2 for bug 1729610

A WIP branch is available as collab/gmcharlt/lp1729610_request_queuing:

http://git.evergreen-ils.org/?p=working/OpenSRF.git;a=shortlog;h=refs/heads/collab/gmcharlt/lp1729610_request_queuing

The patches so far do the following:

* add additional logging
* implement request queueing
* add a new example service, OpenSRF::Application::Slooooooow, that can be used to exercise the problem

Additional work being consider:

* once the queue is full, have the listener respond back to clients indicating that the request cannot be processed. We're processing defining a new status akin to HTTP 503 to allow for clients to potentially moderate the number of requests they send in an intelligent fashion.