JIRA Datacenter - Add Cluster lock status page which doesn't use locks

Problem Definition

In some situations JIRA DC have stale/lost cluster lock. Normally you can check this by navigating to Cluster Locks check [ System > Support Tools > Instance health > Cluster Locks ]. Problem that JIRA Admin space (mentioned check is under that space) uses lock com.atlassian.jira.config.DefaultReindexMessageManager.messageLock, so if it's lost, than it's impossible to check the locks.

Suggested Solution

Create separate Cluster Status space which:

• will not use any lock to access it
• will show all current Cluster locks with following data:
  • Lock name - Node - Age
• (Advanced) will be able to break/steal Cluster lock

Workaround

Check DB table clusterlockstatus:

select * from clusterlockstatus where locked_by_node is not NULL;