Upgrade will fail with IllegalStateException in upgrade task 60201 if upgrading from version 6.1 or lower.
- Create a fresh Bamboo 5.12.5 instance
- Connect it to Crowd for user management
- Create two projects
- Upgrade to Bamboo 6.6
The below exception is thrown in the atlassian-bamboo.log file:
2018-06-28 10:27:50,471 FATAL [localhost-startStop-1] [UpgradeLauncher] Upgrade task error: Task for build 60201 failed with exception: java.lang.IllegalStateException: Connection pool shut down
Upgrade to 6.5.x first and then to 6.6.0