Cannot edit articles

Question

Hi,

i installed a new confluence installation, which is accessed with http.

I can create articles, but not edit. When i start edit an article, i get the following error message:

16-Aug-2017 08:28:39.979 SEVERE [http-nio-8090-exec-4] org.springframework.web.socket.server.support.DefaultHandshakeHandler.handleInvalidUpgradeHeader Handshake failed due to invalid Upgrade header: null

I am using CentOS 7, my confluence version s 6.2.1

How can i resolve my problem?

Thanks!

Aleksandr Serebriakov · Answer

Hi, We have same mesages in logs, but collaborative editing works: 31-Oct-2017 13:21:09.636 SEVERE [http-nio-8082-exec-9] org.springframework.web.socket.server.support.DefaultHandshakeHandler.handleInvalidUpgradeHeader Handshake failed due to invalid Upgrade header: null 31-Oct-2017 13:24:24.836 SEVERE [http-nio-8082-exec-8] org.springframework.web.socket.server.support.DefaultHandshakeHandler.handleInvalidUpgradeHeader Handshake failed due to invalid Upgrade header: null 31-Oct-2017 13:24:35.513 SEVERE [http-nio-8082-exec-8] org.springframework.web.socket.server.support.DefaultHandshakeHandler.handleInvalidUpgradeHeader Handshake failed due to invalid Upgrade header: null 31-Oct-2017 13:24:43.320 SEVERE [http-nio-8082-exec-2] org.springframework.web.socket.server.support.DefaultHandshakeHandler.handleInvalidUpgradeHeader Handshake failed due to invalid Upgrade header: null 31-Oct-2017 13:26:54.707 SEVERE [http-nio-8082-exec-11] org.springframework.web.socket.server.support.DefaultHandshakeHandler.handleInvalidUpgradeHeader Handshake failed due to invalid Upgrade header: null We use apache mod_proxy (Apache 2.4.x)., Revers proxy configuration: ServerName wiki.domainname.com DocumentRoot /var/www/html/wiki ErrorLog /var/log/httpd/wiki-error_log CustomLog /var/log/httpd/wiki-access_log combined HostnameLookups Off UseCanonicalName Off ServerSignature off RemoteIPHeader X-Forwarded-For ProxyVia On ProxyPreserveHost On # RewriteEngine On ProxyRequests Off RewriteEngine On RewriteCond %{REQUEST_URI} !^/synchrony RewriteRule ^/(.*) http://127.0.0.1:8082/$1 [P] # Auth changes in 2.4 - see http://httpd.apache.org/docs/2.4/upgrading.html#run-time Require all granted ProxyPass /synchrony http://127.0.0.1:8091/synchrony Require all granted RewriteEngine on RewriteCond %{HTTP:UPGRADE} ^WebSocket$ [NC] RewriteCond %{HTTP:CONNECTION} Upgrade$ [NC] RewriteRule .* ws://127.0.0.1:8091%{REQUEST_URI} [P] ProxyPass / http://127.0.0.1:8082/ ProxyPassReverse / http://127.0.0.1:8082/ Require all granted What is wrong in our configuration?

AnnWorley · Answer

@Thomas_Manninger Please see the example under the heading, "If you're using Confluence 6.0 or later with Synchrony" on this page:

Proxying Atlassian server applications with Apache HTTP Server (mod_proxy_http)

You need an entry for Synchrony (collaborative editing) in your proxy configuration.

The server.xml is (correctly) set up to direct requests on port 8090 back through the proxy, that's probably why the issue still presents itself when you access the instance directly on that port.

I wanted to share some other general information on Collaborative Editing:

Troubleshooting Collaborative Editing

Please check out the network diagrams on:

Administering Collaborative Editing

Thomas_Manninger · Answer

Hi, thanks for the answer. I already tried multiple browsers and users. I created a new user, created a new site and published. After i start editing and click "save", i get the same error again. The user is not logged out after the error occurs. The problem occurs also, if i access confluence directly by access port :8090. server.xml Connector: And my apache vhost: ServerName docs.corp.domain.at ProxyRequests Off ProxyVia Off Require all granted ProxyPass / http://localhost:8090/ ProxyPassReverse / http://localhost:8090/ Can you help me?