Jira Core 8.21.x upgrade notes

Here are some important notes on upgrading to Jira Core 8.21.

End of support announcements

This release does not include any end of support announcements. For the list of supported platforms, see Supported platforms.

See Preparing for Jira 8.21 for any important changes regarding apps.

See Upgrading Jira applications for complete upgrade procedures, including all available upgrade methods and pre-upgrade steps.
For a more tailored upgrade, go to Jira administration > Applications > Plan your upgrade. We’ll recommend a version to upgrade to, run pre-upgrade checks, and provide you with a custom upgrade guide with step-by-step instructions.