I think you need to clear the plugin cache 

https://jira.atlassian.com/browse/JRA-27314

My Jira plugin keeps failing
We have a few Sun M5000 servers with the following configuration:


Each system has 2 system boards each containing 2 x 2.5Ghz quad core processors
Each system board has 16GB of RAM
Each system has 4 x 300GB disks


I would like to know how many hardware domains can I configure per system? Do I need one system board per domain (implying a total of 2 domains), or can I create 4 domains, each with one cpu each?
