Jenkins is an open source automation server. It helps automate the parts of software development related to building, testing, and deploying, facilitating continuous integration and continuous delivery. It is a server-based system that runs in servlet containers such as Apache Tomcat.
Why is this technology on hold?
As our projects grew, we encountered several persisting issues with Jenkins, which made us move to Gitlab CI. See Gitlab's motivation section for more info why we chose for Gitlab.