Changelog

Major bug fix

Show form validation results for form elements that are initially hidden. Remove previous form validation errors when the form validation is updated with new content (regression in 2.355). issue 71252 , issue 70793
Fix multibranch Pipeline Add source and other uses that mix inputs and buttons (regression in 2.422). issue 72170
Add sleep call when -noReconnect is not specified for Kubernetes agents. Remoting PR 675
Add proxy support for Remoting. issue 65368
Fix agent allocation due to label issue detected by vSphere Cloud plugin (regression in 2.421). issue 71937
Fix drag and drop handle for existing repeatables (regression in 2.335). issue 72189

Enhancement

Bug fix

Show the description of boolean build parameter values on the Parameters view (regression in 2.179). issue 72179
Allow clouds to be reordered. This was previously possible, but disappeared when the cloud management was moved to a separate page (regression in 2.403). issue 72020
Update SnakeYAML plugin to 2.2 to silence security scanners. issue 70994

Major enhancement

Support Java 21 in addition to Java 11 and Java 17. issue 71800 , Java 21 supported in 2.426.1
Remove outdated Prototype.js library. issue 70906 , pull 7781, Prototype removal blog post
Stop delivering CentOS 7 container images as part of the end of support for Red Hat Enterprise Linux 7 and its derivatives. Red Hat Enterprise Linux 7 and CentOS 7 end of life blog post, Docker pull request 1777
Replace browser confirm with modal dialogs in many places. Add API for alert, confirm, prompt, modal and form dialogs. issue 71438
Updates to various UI elements. Modernize buttons, menus, link design, and content blocks. pull 8381, pull 8376, pull 8375, pull 8363, pull 8180
Add Appearance system configuration page to customize Jenkins' look and feel. pull 8403
Various performance optimizations. Optimizations for loading, label parsing, and project deletion. pull 8494, pull 8395, pull 8299

Major bug fix

Prevent incorrect readResolve implementations from breaking agent label parsing. pull 8448

Enhancement

Automate the display of an administrative monitor when approaching Java end of life (EOL) dates. pull 8526
Remove System V initialization scripts from RPM based installers. The System V initialization scripts were replaced in March 2022 with systemd initialization. RPM users with a custom log directory no longer have a logrotate(8) configuration out-of-the-box. pull 409 (packaging), Linux install packages migrated from System V init to systemd
Add a nicer 404 error page. issue 71087
The minimum required Remoting version has been increased from 4.7 to 4.13. pull 8503
List plugins in deterministic order to improve diagnosability of plugin linkage errors. issue 71950
Display a notice when plugin updates are available or when there are no plugins installed. pull 8208
Remove the treeview option for artifactList. issue 71054
Log agent usage by job. pull 8283
Make tab panes accessible via keyboard. issue 71496
Add allow-same-origin to the sandbox ContentSecurityPolicy directive of workspace and artifact browsers if the Resource Root URL feature is not used. Allow requests to resources like stylesheets and images, even if a reverse proxy prohibits cross-site requests. issue 71366
Updates to Turkish localization for jobs. pull 8368
Remove the rebuild plugin from the setup wizard plugin selection. pull 8258
Stop shipping net.sf.kxml:kxml2 because Jenkins no longer depends on it. pull 8503

Bug fix

Prevent log spam when using the Jenkins security database and users signup. pull 8474
Show a confirmation popup when triggering a task action from a context menu. issue 71880
Hide the delete button from the only repeatable element in configuration forms when at least one element is expected. issue 72018
Symbols display in breadcrumbs now. issue 71983
Message no longer appears twice when the agentLog option is used. issue 38520
Hide administrative monitors icons/popup in the header of Manage Jenkins, as they're shown directly on the page. issue 71848
Fix link to job in the message informing administrators of trigger computations that run for an unusually long time. issue 71833
Use standard size node icon even with long node names. pull 8089
Add the X-Content-Type-Options HTTP header to the response from the agent listener. Silence security scanners that incorrectly report an issue when the HTTP header is missing. issue 71186
Estimate project duration accurately in more cases. pull 8233

Changelog for 2.426.1