Waiting for API to ack qan_1405566379376419373: read tcp 162.220.4.204:443: i/o timeout
These happen repeatedly in my logs. Any ideas?
Answering my own question here.
I had enabled percona-agent prior to setting up this new server and doing an import of lots (gigs and gigs) of SQL data. Those apparently generated slow logs, which generated really big qan files (127-300MB apiece). Those were timing out during upload to the API. I delete the large files and restarted the agent to get things back on track.