One of my H@H clients went down earlier today, and checking its log, there were repeated warnings:
CODE
[WARN] Failed stillAlive test: (KEY_EXPIRED) - will retry later
Restarting it seems to have fixed the issue, although shutting down also reported an error I've not seen before:
CODE
[info] Shutting down...
[WARN] Server reported expired key; attempting to refresh time from server and retrying
[WARN] Shutdown notification failed.
Mostly reporting this in case it's some sort of upstream issue.