Collaborative Editing does not work after migration from Data Center to Server
Platform Notice: Data Center Only - This article only applies to Atlassian products on the Data Center platform.
Note that this KB was created for the Data Center version of the product. Data Center KBs for non-Data-Center-specific features may also work for Server versions of the product, however they have not been tested. Support for Server* products ended on February 15th 2024. If you are running a Server product, you can visit the Atlassian Server end of support announcement to review your migration options.
*Except Fisheye and Crucible
Problem
After migrating Confluence from Data Center to Server edition, Collaborative Editing cannot be enabled.
The following appears on screen after clicking Change Mode > Enabled on the Collaborative Editing menu at: <base-url>/admin/confluence-collaborative-editor-plugin/configure.action
We couldn't connect to your Synchrony cluster from this Confluence node.
Diagnosis
Environment
Confluence Server 6.6.x (migrated from Data Center)
Diagnostic Steps
When attempting to enable Collaborative Editing, the error in the below screenshot is displayed.
In the able screen, note that Synchrony URL is displayed on the bottom right under configuration - this should only appear in Data Center instances. Server instances should look like this:
The following configuration settings are in confluence.cfg.xml:
1<property name="synchrony.btf">false</property>
Resolution
Update confluence.cfg.xml and set
synchrony.btfto true:1<property name="synchrony.btf">true</property>Add the following parameter to setenv.sh (or setenv.bat for Windows):
1CATALINA_OPTS="-Dsynchrony.proxy.enabled=true {CATALINA_OPTS}"Restart Confluence
Enable Collaborative Editing
> General Settings > Collaborative Editing
Click Change Mode
Click On
Click Change
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