Keeping up with our goal to clean up some of the technical debt inside Jenkins Core and reduce the maintenance overheads, we are happy to report we were able to remove a long-deprecated Apache Commons Digester library. Jenkins Core does not depend anymore on Apache Commons Digester v.2.1, a version that has been released in 2010. Some plugins will require update to operate properly after the...

Recently we have selected Jenkins 2.263 as a new baseline for the LTS release line, with ETA in December 2020. It allows delivering significant and in some cases breaking changes which have been previously on hold. Beginning with the Jenkins 2.264 release on October 27, 2020, we’ve entered a period where the Jenkins weekly releases will include more significant changes than usual. That period of more significant...

Cleaning up technical debt is a perennial topic among Jenkins core developers, and one of the most visible issues is the use of obsolete and/or forked third-party libraries. In a world where Dependabot is offering updates to libraries released just hours before, it is unpleasant to be working with dependencies that are many years old. Since large organizations in particular are unhappy to install software using obsolete or...

I am happy to report that JEP-222 has landed in Jenkins weeklies, starting in 2.217. This improvement brings experimental WebSocket support to Jenkins, available when connecting inbound agents or when running the CLI. The WebSocket protocol allows bidirectional, streaming communication over an HTTP(S) port. While many users of Jenkins could benefit, implementing this system was particularly important for CloudBees because of how CloudBees Core on modern cloud platforms (i.e., running on Kubernetes)...

Half a year ago we delivered a security fix for Jenkins that had the potential to break the entire Jenkins UI. We needed to change how Jenkins, through the Stapler web framework, handled HTTP requests, tightening the rules around what requests would be processed by Jenkins. In the six months since, we didn’t receive notable reports of problems resulting from this change, and it’s thanks to...

This is a joint blog post prepared by the Java 11 Support Team: Adrien Lecharpentier, Ashton Treadway, Baptiste Mathus, Jenn Briden, Kevin Earls, María Isabel Vilacides, Mark Waite, Ramón León and Oleg Nenashev. We have worked hard for this and it’s now here. We are thrilled to announce full support for Java 11 in Jenkins starting from Jenkins 2.164 (released on Feb 10, 2019) and LTS...

Close to two years ago, we announced in New, safer CLI in 2.54 that the traditional “Remoting” operation mode of the Jenkins command-line interface was being deprecated for a variety of reasons, especially its very poor security record. Today in Jenkins 2.165 support for this mode is finally being removed altogether, in both the server and bundled jenkins-cli.jar client. The projected June 5th LTS release will reflect this removal, at which...

At the time of the Spring Festival. I want to make a summary of some activities in the last year. You might already notice that more and more Chinese contributors emerge in the Jenkins community. We have a GSoC champion who is Shenyu Zheng. He is a great example for other students. With the effort of three skilled engineers, many Jenkins users could learn the edge technologies and...

The end of a year is a great time to step back from the daily grind to look at the big picture. Across the industry, the relentless march toward more automation still continues on. We are writing software faster than ever, but the demand for software seems to be going up even more, and I feel more and more businesses and executives are keenly aware...

Please refer to Running Jenkins on Java 11 documentation to have the up-to-date details on how to run Jenkins on Java 11. This is a joint blogpost prepared by the Java 11 Support Team. On Dec 18 (4PM UTC) we will be also presenting the Java 11 Preview Support at the Jenkins Online Meetup (link) Jenkins, one of the leading open-source automation servers, still supports only Java 8. On...