A server I'm playing on is experiencing the same issue: Hostile mobs spawning extremely rarely, server logs have "Can't keep up" message. The world was created in 1.7.2, and experienced no issues until the minute the 1.7.4 update was applied to the server. The server in question has at least 2GB RAM, and no users have render distance set greater than 8.
I agree with Matthew that this issue should be marked as unresolved, not duplicated.
Connor Weins
A server I'm playing on is experiencing the same issue: Hostile mobs spawning extremely rarely, server logs have "Can't keep up" message. The world was created in 1.7.2, and experienced no issues until the minute the 1.7.4 update was applied to the server. The server in question has at least 2GB RAM, and no users have render distance set greater than 8.
I agree with Matthew that this issue should be marked as unresolved, not duplicated.