I am trying to fix a problem occurring with my Zimbra server, which is currently at version 8.7. Please bear with my explanation as the error is a bit confusing to me as it seems to manifest in a variety of ways.
In short, users are having trouble with the HTTP server. There are two main symptoms of their problem:
- When they try to send an email it fails, with the email reappearing in the user's drafts and the server sends a message too their inbox informing them off the crash, a 502 error.
- When they try to access the web interface for their mailbox, it is extremely slow or crashes, giving the same 502 error.
Code: Select all
Error Code: <html>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"/> <title>Error 502 Connection to Upstream is Refused</title> </head> <body> <h2>HTTP ERROR 502</h2> <p>Problem accessing ZCS upstream server.
Cannot connect to the ZCS upstream server. Connection is refused.<br/>
Possible reasons:
<li>upstream server is unreachable</li>
<li>upstream server is currently being upgraded</li>
<li>upstream server is down</li>
Please contact your ZCS administrator to fix the problem.
<i><small>Powered by Nginx-Zimbra://</small></i><br/>
Error Text: <html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"/> <title>Error 502 Connection to Upstream is Refused</title> </head> <body> <h2>HTTP ERROR 502</h2> <p>Problem accessing ZCS upstream server.
Cannot connect to the ZCS upstream server. Connection is refused.<br/>
Possible reasons:
<li>upstream server is unreachable</li>
<li>upstream server is currently being upgraded</li>
<li>upstream server is down</li>
Please contact your ZCS administrator to fix the problem.
<i><small>Powered by Nginx-Zimbra://</small></i><br/>
There are a few other oddities in the logs which I can go into as required. One standout example is that I can produce the above mentioned errors accurately when I see the following messages in /opt/zimbra/log/nginx.log (whilst using the tail -f command on the server). Many (without measuring I would guess at least 100 individual lines detailing the same thing, although from a variety of users) of these errors appear together:Message: Network error Error code: AjxException.NETWORK_ERROR Method: AjxRpc.prototype._invoke Details:Failed to execute 'send' on 'XMLHttpRequest': Failed to load 'https://postoffice.wmawater.com.au:7071 ... oOpRequest
I am aware that similar questions have been asked elsewhere on the forums but none of these threads appear to have received conclusive answers. Specifically I have looked at this one which has similar symptoms: viewtopic.php?t=619672018/03/19 13:34:05 [error] 24587#0: *373878 no live upstreams while connecting to upstream, client: 192.168.100.132, server: postoffice.wmawater.com.au.default, request: "POST /Microsoft-Server-ActiveSync?Cmd=Ping&User=podger@wmawater.com.au&DeviceId=3F5BDBE5DC664803B12E849B59DB5139&DeviceType=WindowsOutlook15 HTTP/1.1", host: "postoffice.wmawater.com.au"
Any thoughts are appreciated and any further clarification needed please ask.