Cannot connect to the zcs upstream server

00:19:44,710 INFO sqltrace - Slow execution (18032ms): SELECT mi.id, mi.type, mi.parent_id, mi.fo$ 00:19:00,200 INFO misc - Suspending for 1000ms because context path /service is at 20$ 00:19:06,527 INFO misc - Suspending for 1000ms because context path /service is at 20$ 00:19:06,526 WARN mailbox - transaction canceled because of lock failure Please find below relevant information from log files ( I have replaced server IP and hostname with 192.168.1.33 and ) : I restarted Zimbra services and the issue continues.ДЄny feedback about this issue will be highly appreciated.

Zmprov mcf zimbraMailProxyReconnectTimeout 0 Minutes later Zimbra Admin is also not available, I only get a blank page. Please contact your ZCS administrator to fix the problem. Upstream server is currently being upgraded Cannot connect to the ZCS upstream server. The server has been working well for about a year but lately Zimbra webmail is not available, I get:

I have a Zimbra server 8.7.11 GA Release (Open Source version) Ubuntu 16.04 LTS.

Cannot connect to the zcs upstream server