Changelog for 2.248

Legend:

security fix
major bug fix
bug fix
major enhancement
enhancement

Community feedback:

no major issues
notable issues
required rollback

What's new in 2.248 (2020-07-21)

The Windows MSI package has not been released yet due to an unexpected release infrastructure issue. As a workaround, please download jenkins.war manually and replace it in JENKINS_HOME.

Stop supporting .NET Framework 2.0 for launching Jenkins server and agents as a Windows service. .NET Framework 4.0 or above is now required. (announcement, upgrade guidelines, issue 60005 , issue 61862 , Windows support policy)
Update Windows Service Wrapper (WinSW) from 2.3.0 executable for .NET Framework 2.0 to 2.9.0 for .NET Framework 4.0. Includes numerous improvements and bugfixes. Most notably, the service installer will now ask for permission elevation if the required. (changes summary, full WinSW changelog, Windows Agent Installer 2.0 changelog)
Reorder configuration and delete buttons in the left sidepanel. (pull 4852)
Add the ability to filter out environment variables for Shell and Windows batch build steps. (issue 62014)
Revamp the tabs and tables with better spacing and a consistent color palette. (issue 63002)
Remove page generation timestamp from the footer. (issue 61806)
Add sorting to Old Data management tables. (issue 25259)
Allow fingerprint storage engine to be selected from the configuration page. (issue 63022 , JEP-226)
Show warnings for deprecated plugins in the update manager and administrative monitors. (issue 59136)
Update Jenkins form styling in preparation for changing form layout. (issue 56109 , Configuration UI Accessibility: Tables to Divs migration)
Show hints about the current time on the server’s zone when configuring your User Defined Time Zone. (issue 61806)
Fix IllegalArgumentException: Method not found error caused by misbehaviour in Util.isOverridden() (regression in 2.241). (issue 62723)
Avoid a stack trace when an older version of glibc was used by an agent. (pull 4830)
Remove the fallback Jenkins URL from the JNLP launch file so that WebSocket agents can be connected over Java Web Start. (issue 63014)
Fix the default domain name in Windows service serviceaccount configurations. (issue 12660 , Windows Service Wrapper 2.7.0 changelog)
Developer: Add new extension points to define build step environment filters (currently in beta). (issue 62014)
Developer: Add theming support for alert-* classes. (Dark Theme repository)
Developer: Add alert-success banner. (issue 62747)
Developer: Allow theming the text area handle. (Dark Theme repository)
Developer: Require FingerprintStorage descriptors so they can be configured from the configuration page. (issue 63022)
Developer: Remove method BeanBuilder.loadBeans(String). (pull 4838)
Internal: Allow JUnit 5 tests in the Jenkins core unit tests. Jenkins Test Harness-based integration tests still require JUnit 4. (pull 4699)
Internal: Use built-in WinSW features for permission elevation and strong cryptography. (pull 4823, Windows Agent Installer 2.0 changelog)
Internal: Upgrade to Remoting 4.5. This switches agent.jar and remoting.jar to a code-signing certificate owned by the CDF. (pull 4832, Remoting 4.4 changelog, Remoting 4.5 changelog)
Internal: Remove inline resources from layouts. (issue 60866)
Internal: Document the Jenkins core issue triage guidelines. (documentation)