Disabling JIRA Working Hours causes system to hang

Currently installing JIRA Service Desk also installs JIRA Working Hours. Service Desk is dependent on JIRA Working Hours, but it's not immediately apparent.

If an admin disables JIRA Working Hours and tries to access a Project's issue that uses Service Desk, it can cause the system to hang.

Steps to Reproduce

• Install Service Desk
• Create a new Service Desk
• Create a new Service Desk Request
  • Take note of the issue ID
• Disable JIRA Working Hours
• Try to access the same issue
• The page simply hangs and there is noticeable system slow down when accessing any other sections of JIRA

There are also no logging messages to help indicate where the problem is occurring.

Workaround

Do not disable the JIRA Working Hours! If it is disabled, it can be re-enabled with the following SQL if the instance is not accessible:

1. Stop JIRA.
2. Run the following SQL:

   UPDATE pluginstate 
   SET    pluginenabled = 'true' 
   WHERE  pluginkey = 'com.atlassian.jira.plugins.workinghours'; 
   

3. Start JIRA.