If you use two wso2 esb servers and If down both in the same time

If both DMZ and LAN servers down at the same time, or you want to restart both servers in the same time, there is a best practice to do. Please do the following steps.

****** You need to follow these steps only your servers accessing services each other. 

1.       Start any server first. Let the server begin to work. Don’t try to start other server. Server will start, if you check its log file you can see some errors regarding cannot start proxy services. 

2.       Now start second server. It will start without any errors.

3.       Then again restart first server. Now it will start all proxy services without any errors.