The 'timeout' as referred to in the list of possible actions ('schedule a timeout') refers to the timeout mechanism used to implement master election in Arakoon

The 'timeout' as referred to in the list of possible actions ('schedule a timeout') refers to the timeout mechanism used to implement master election in Arakoon, our product on which some of the experience in the article is based, where we attempt to be at level 3 in the rewrite we're currently working on. When this action is evaluated (in the impure part of the system), an action will be scheduled with the threading system for execution sometime later, at which point some new message will be sent through the machinery, just like any other message received from another node on the network. It's not about timeouts on message transmission or anything alike.