Discovery events are essential, so they are always enabled, regardless of configuration.
As for "last disconnection, or first connection", can you please clarify what you mean by this? What's the use case behind this? Also take a look at this page about client reconnection: https://apacheignite.readme.io/docs/clients-vs-servers#client-reconnection. It seems to me this can be what you're actually looking for. -Val -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/