Coherence*Extend connection exception handling

I have cache serve use Coherence grid 14.1.1 with federation as schema and extends client support

client use hibernate 5.2.17 with L2 coherence grid 14.1.1 cache

How to handle connection failure between client and cache server so that when server down the client continue save normal on DB without crashing. As for now when cache server is down or there is some connection issue the client crashed and all CRUD operation fail.

Second is there is a way to have multiple remote proxy options with priority, as if first listed proxy fail the App client will try to connect to another listed proxy in configuration file. If all fails then the App client L2 cache should simply ignore caching.