Spark 2.7.2, Build 695 - Whenever the administrator’s computer is hibernating or shut down, Spark ceases to work for all other users. Why is this and is there a workaround for this issue?
If he is running the server on his computer, then that’s the cause. The server part (Openfire presumably) should be running on a server, or at least sleep/hibernate should be disabled on a PC running it.