Administering Collaborative Editing
Collaborative editing takes teamwork to the next level. This page covers everything you need to know about administering collaborative editing.
Head to Collaborative editing to find out how your team can work together in real time on software requirements, meeting notes, retros, and any other Confluence page you can think of.
Collaborative editing is powered by Synchrony which synchronizes data in real time. Synchrony is managed by Confluence, so administrators should rarely need to interact with it directly.
Synchrony runs on port 8091 by default, and an internal Synchrony proxy means that you shouldn't need to open this additional port.
How you connect to Synchrony will depend on your environment, and your Confluence license. See Possible Confluence and Synchrony Configurations.
To see your collaborative editing and Synchrony setup, head to > Collaborative editing. > General Configuration
Change the editing mode
The editing mode determines the editing experience for all users in your site. This is how you turn collaborative editing on or off.
To change the editing mode:
- Go to > Collaborative editing. > General Configuration
- Choose Change mode.
- Select a mode and choose Change.
Changing the editing mode is not trivial, and some changes can result in the loss of your users' drafts, so it is good to understand the implications of each mode.
The following modes are available:
This mode allows your team to edit a shared draft of a page at the same time, and see each others' changes in real time.
This the recommended editing mode.
This mode protects your users' shared drafts if you need to troubleshoot Synchrony. You would only switch to this mode if your users are experiencing problems editing and publishing.
The editing experience will be very limited for your users:
As soon as Synchrony is running again, we recommend turning collaborative editing back on.
This mode means that your team can only edit their own personal draft of a page. Confluence will attempt to merge any conflicts on save. This mode replicates the Confluence 5 editing experience.
This mode is useful if you are unable to run Synchrony successfully in your environment, or if you have decided that collaborative editing is not for you (for example if you have auditing requirements that would prohibit using collaborative editing just yet).
You should make sure your users have published any work they want to keep before you turn collaborative editing off.
Maximum editor limit
A maximum of 12 people can edit a page at the same time. This means that people can't enter the editor if there are already 12 other people editing the page, and will need to wait until someone leaves.
Administrators can increase or decrease this limit using a system property. If you experience performance issues when many people are editing, you might want to decrease this limit.
We know that auditing is a major consideration for some customers. We don't yet have very granular auditing capabilities with collaborative editing. All page changes are currently attributed to the person that publishes the page, rather than the people who made each specific change.
If this is going to be a problem in your site, we recommend turning collaborative editing off in your site for now.
No version history in unpublished drafts
We're saving all the time in collaborative editing, but we don't save versions of unpublished changes. When restoring an earlier page version, you can only roll back to an existing published version. Any unpublished changes will be lost when you restore a previous version.
Visibility of edits made by anonymous users
There are some additional things to be aware of if you have granted the Add page permission (and Can use global permission) to anonymous users.
You won't be alerted, when closing the editor or publishing a page, if the only unpublished changes on the page were made by anonymous users. This means a logged in user may inadvertently publish changes they were not aware had been made to the page.
The changes themselves are visible in the page, but the usual warning dialog will not appear if the only people to have made changes were not logged in.
If there are unpublished changes from both logged in users and anonymous users, the warning dialog will appear, but only the logged in users will be listed in the dialog. Changes made by all users (including anonymous) will be included if you view the changes from that dialog.
Proxy and SSL considerations
How you connect to Synchrony will depend on your environment. We know that most Confluence sites run behind a reverse proxy, often with SSL. Here's some information to help you identify the right configuration for your environment, and any changes you might need to make to your environment to use collaborative editing in your site.
Synchrony runs in a seperate JVM, and does not support direct HTTPS connections. If you are not using a reverse proxy, SSL should be terminated at Tomcat. If you are using a reverse proxy or load balancer, SSL should be terminated at your reverse proxy or load balancer.
See Possible Confluence and Synchrony Configurations for detailed diagrams and examples.
If you run Confluence behind a reverse proxy, you should take a look at the Possible Confluence and Synchrony configurations for guidance on how your Confluence and Synchrony setup may impact your proxy.
See Possible Confluence and Synchrony Configurations for detailed diagrams and examples, plus links to example proxy configuration files.
For best results, your load balancer and proxies should allow WebSocket connections. If your users are unable to get a WebSocket connection, Confluence will fall back to a XML HTTP Request (XHR), allowing them to edit pages successfully.
XHR fallback is enabled by default, but can be disabled using a system property (passed to Confluence) if necessary. You shouldn't need to change this.
Change your Synchrony configuration
You can't change your Synchrony configuration through the Confluence UI. In most cases you shouldn't need to make changes to the default configuration.
If you need to change the port Synchrony runs on or the maximum memory available, for example, you can do this using a system property, or in your start-synchrony script (if you're running your own Synchrony cluster).
See Configuring Synchrony for more information.
Start and stop Synchrony
If Synchrony is managed by Confluence (recommended), Confluence will automatically start Synchrony for you when it starts up. You can also restart Synchrony from the collaborative editing admin screen in Confluence.
If you're running Synchrony standalone in a cluster, you'll use the
start-synchrony.bat. scripts on each Synchrony node. A process ID (PID) file will be created in your synchrony directory.
Stop Synchrony the same way, using
stop-synchrony.bat. This will destroy the PID file that the start script created in your Synchrony directory. If you've customised the location for storing the PID file in the
start-synchrony script, you'll need to also update this in the
If you're unable to start Synchrony, check that there isn't an existing PID file in your Synchrony directory.
To check if Synchrony is running, go to > Collaborative editing. > General Configuration
If you're running Confluence in a cluster, you can check the status of Synchrony on each node from the clustering screen.
Go to > Clustering, then on each node choose Collaborative editing. You can access all nodes in this way, you don't need to hit a specific node in your browser. > General Configuration
From here you can see the Synchrony status, mode, and URL Confluence is using to connect to it. Here's what it looks like when Synchrony is managed by Confluence.
All Confluence nodes must use the same Synchrony mode. For example, you can't have one node using managed Synchrony, and another node connecting to an standalone Synchrony cluster.
Accessing Synchrony logs
If Synchrony is managed by Confluence (recommended), Synchrony logs will be stored in your
<local-home>/logs directory, with the Confluence application logs.
If you're running Synchrony standalone in a cluster, your Synchrony logs will be stored in the Synchrony directory on each Synchrony node (wherever you run the start and stop scripts from).
Managing Synchrony data
Each page and blog post has its own Synchrony change log, which contains a graph of all edits to that page or blog post. In busy Confluence sites the database tables that store the Synchrony change logs can grow very quickly, and because the change logs store all changes as they happen, they may retain personally identifiable information, even after the page they relate to has been deleted.
We provide two scheduled jobs for removing Synchrony data:
- Synchrony data eviction (soft)
- Synchrony data eviction (hard).
The soft eviction job runs regularly in the background. The hard eviction job is available for when you need to remove Synchrony data more aggressively, and is disabled by default.
See How to remove Synchrony data for more information on how these jobs work.