Based on Jenkins
The JSON field that is present for all inherited classes of Cause "_class" was missing on BuildTriggerCause, which was an issue when using it with groovy code in Pipelines. With this fix, the field "_class" is now present again. When creating Pipelines with groovy scripts, JSON files that contained a null attribute would cause the build to fail, and an exception was fired, "org.kohsuke.stapler.export.NotExportableException: class net.sf.json.JSONNull doesn’t have @ExportedBean". With this fix, when creating Pipelines with groovy scripts, if the JSON file has a null value, Jenkins will remove the attribute from the JSON when exporting it.
Maven jobs could not be moved/copied using the Move/Copy/Promote feature. With this fix, there is a new file (permalinks) inside the builds folder which is autogenerated by Jenkins core, and the Move/Copy operations are overwriting it now.
When the authorization strategy on Operations Center was not RBAC (Role Based Access Control), Operation Center’s SSO (single sign-on) was not functioning properly, even when the user was granted access to the master. Instead, after creating a team, users were redirected to the Team Master login page. With this fix, Operations Center correctly propagates the security realm to the master even when RBAC is not the authorization strategy.