Upgrade from 8.10.1 to 8.11 crashes JIRA

[Cognizant Mobility]

JIRA Service is unavailable an run to timeout

[Nic Brough -Adaptavist-]

That tells us that the service is not responding when the proxy asks it for something.

This usually means it is not running (usually you'll get that message immediately), or that it is doing something and cannot serve (you'll get this message after waiting for a short time).

If the system is upgrading, it may not have reached a point where it can serve anything up, so you'll see the timeout there.  You'll need to leave it to finish (one of my current projects has a 4 hour upgrade process - you start Jira, and it makes structural changes to the database which take hours, so for a large Jira you may need quite a wait).

If it's not in the process of upgrading, then you should read the application logs to find out why it is not serving or why it has shut down.