Upgrading actions are required.
Check Upgrading to 2.4.3 topic for details.
Enhanced TRS support for Jira Data Center
Improved support for very large data sets usually found on Jira Data Center instances. This release ensures linear performance as data set grows in Jira, reduces TRS response times using paging and minimizes memory consumption on server.
Upgrading actions are required.
Downgrading is supported.