Thanks for the message. By the time I got to it, it was back up -  no restart or anything. I'm going to dig through the logs to find out what happened.. Apologies for the downtime :[!

Update: P2Pool was set to Persist mode - which worked all up to the point that the node at coinminer.net disconnected at 09:54:46. When coinminer.net reconnected at 13:11:05, P2Pool had its network again and resumed work.

The Persist feature is there to make sure no forks happen in the P2Pool share system, by explicitly doing nothing until a network is formed by two or more connected nodes - but I obviously made a grave mistake in keeping that enabled. I've set it to false and restarted the pool so that this doesnt happen again.

For other node operators; as long as my pool is running and in the BOOTSTRAP_ADDRS, you can leave Persist enabled - though it wasnt distributing work to miners, it was still running. Setting it to false wouldn't necessarily be bad though.