Overview Recently some UI improvements around the Manage Jenkins page have been introduced. The visual changes are very subtle but behind them, there are interesting benefits. Some of the goals that we have tried to achieve: Applying a semantic HTML Removing the <table> tag usage for implementing layouts and content structures. Read this article if you want to know reasons and/or arguments. Small re-styling focused on spacing, margins, composition,...

Overview JEP-200 has been integrated into Jenkins weekly builds and (if all goes well) will be a part of the next LTS line. In a nutshell, this change is a security hardening measure to be less permissive about deserializing Java classes defined in the Java Platform or libraries bundled with Jenkins. For several years now, Jenkins has specifically blacklisted certain classes and packages according to known or suspected exploits; now...

There are upcoming changes in Jenkins "core" which may require extra steps when upgrading Jenkins. If you use configuration management for Jenkins agents, please read this announcement carefully. If you have ever seen messages like "Channel is already closed" or "Remote call failed" in your build logs, you have already met Jenkins Remoting. Remoting is an agent executable (aka slave.jar) and a library implementing the communication layer between...

In the next few months, Jenkins will require Java 8 as its runtime. Back in last November, we discussed interesting statistics showing that Jenkins was now running Java 8 on a majority of its running instances. Timeline Here is how we plan to roll that baseline upgrade in the next few months. Now: Announce the intention publicly. April, 2017: Drop support for Java 7 in Jenkins weekly. With the current rhythm, that means...