Problem Description :
User tried to create the community in eB and getting error message of Connection Lost Contact as shown in below screenshot
Root Cause :
Attached error may occur may be because -1)Server was unexpectedly terminated or was forced to terminate.2) Server timed out the connect3) Windows firewall is checking for local connections
Problem Solution :
The above error occurs in case of oracle database. Below is article from oracle forum which may helps to resolve the issue.