Adobe I/O Runtime Craps Out Randomly

Hi everyone, 

I'm having a pretty serious issue with Adobe I/O.  To give a little context, we’re using AEM to communicate with a commerce system via Adobe I/O.  We’re using the CIF OOTB framework to do so.  The long of the short is that once I deploy my Adobe I/O application, everything is happy and works for a while.  But invariably, within a day or two (sometimes more, sometimes less) it just kind of stops sending responses back to AEM.  When checking the activations, all I can see is

"error": "No activation within timeout. Please retry."

And from there, it just keeps throwing

"error": "The action did not produce a valid response and exited unexpectedly."

And won’t work again until I wipe out the endpoints and redeploy all of them.

I have no idea whether those logs are actually relevant or not, but I don't really know how to get more information than this.  If the issue is truly timeout-related, I would not expect it to break Adobe I/O entirely until the application is re-deployed.

Does anyone have any clue what might be happening here, and how I can even troubleshoot this?

I'm supposed to go live with this system in less than a week, and I desperately need to figure out what's going on so I can fix it and not risk production outages.

Thanks in advance!