Zimbra Proxy

[Rama]

Hi,

We are in process of building Zimbra cluster with 8.8.8 in Centos-7. The architecture is LDAP + MTA + Proxy + Memcache sharing 192.168.0.11 & 192.168.0.12 which are behind proxy with round-robin policy enabled in our DNS. And, Zimbra mailbox is configured on another server, 192.168.0.13.

Setup is running fine till now. The problem raised here is if MTA is being accesible with one of the IP 192.168.0.11 and for any reason the zimbra stopped over the host, we are getting error "Error code: EMPTY_RESPONSE Method: BatchRequest" on url. If we need to refresh the url again, it is pointing to 192.168.0.12 and work resuming back.

Is there any feasible way it should be fall back on the fly and work go smoothly, if any host is not reachable.