If you’ve ever worked with JetBackup 5, you’ve probably seen at least one error that makes your heart sink. For me, one of the trickiest was this MongoDB connection issue: Fatal error: Uncaught MongoDB\Driver\Exception\ConnectionTimeoutException: No suitable servers found (serverSelectionTryOnce` set): [connection refused calling hello on ‘localhost:27217’] Looks ugly, right? But here’s the truth: it’s basically JetBackup saying, “Hey, I tried to talk to MongoDB on port 27217, but it wouldn’t answer.” I’ve run into this a few times, and the good news is — there are clear steps you can take to …