Heartbeat Error Thrown While Editing Template and Blueprint

Steps to reproduce:

1. Install Confluence

1. Login as administrator users

1. Navigate to Administrations >  Global Templates and Blueprints

1. Edit any of the System Template , eg: Default Personal Space Content or Default Space Content

In the logs we will be seeing traces like below:

2017-11-08 21:50:35,545 ERROR [http-nio-9642-exec-1] [confluence.pages.actions.HeartbeatAction] startActivity No content found or no permission to view content with contentId: 0
 -- referer: http://localhost:9642/confluence642/plugins/createcontent/edit-template.action?pluginKey=com.atlassian.confluence.plugins.confluence-default-space-content-plugin&moduleKey=spacecontent-personal | url: /confluence642/json/startheartbeatactivity.action | traceId: b3336d4cfc62e9e2 | userName: admindoe | action: startheartbeatactivity

Workaround:

1. We can remove the noise by adding the line below into the confluence_install/confluence/WEB-INF/classes/log4j.properties:

   log4j.logger.com.atlassian.confluence.pages.actions.HeartbeatAction = OFF
   

1. Restart Confluence
    

Notes:

This workaround is also documented at Getting a lot of HeartbeatAction errors in the logs