OK…if all 3 instances on a 3-node cluster suddenly start “timing out”, yet you can log directly in and query the databases…don’t you think you should at least look at the network components first?
Especially when the errors are showing on the client and web boxen…
Grrrrr….
Yes you should look at the network. I am assuming 1st that this is an active active cluster with one instance to one node situation. If not then check the CPU utilization and memory usage of the host hosting 2 or all 3 of the insances