First off, well aware that InfluxDB is alpha at best. We were testing integration between a Grafana instance and LibreNMS. Power outage rebooted Grafana VM host and VM didn’t start. LibreNMS quit graphing. Logs showed Mysql connection limit errors.
I’m guessing each polling operation is leaving the MySQL connection open while it tries to reach the offline InfluxDB instance. Eventually limiting out. I don’t know if this is actively being worked on or not, but some sort of timeout should be in place there to just give up and move on if the InfluxDB isn’t reachable.