Hi Alberto, 

I am using an existing cluster for it and not creating new cluster. I am using an all purpose cluster and which is used by multiple people in different regions so I'm not sure if I can disable Multi AZ. Is there a solution in which I can use an existing instance of cluster? 
Also if you could please explain why is it restarting exactly? the Jar file is already installed on cluster, then what's the need to install it again?