This is a longstanding JENKINS-26677 that has never been satisfactorily resolved, though there have been workarounds. You can see it without any custom plugin, just using `CommandLauncher` with `jenkinsci/docker-agent`, depending on how Jenkins is being run and what build steps you use. The problem relates to how the Servlet API is loaded from the servlet container hosting the Jenkins master.
Anyway, if you are able to reproduce, please give feedback on https://github.com/jenkinsci/jenkins/pull/3778. Assuming the build is successful, it should deploy an incremental version 2.154-rc27545.0e85c9fb206a which you can use as `jenkins.version` in your POM (or passing via `-D` to `hpi:run`). -- You received this message because you are subscribed to the Google Groups "Jenkins Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to jenkinsci-dev+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-dev/CANfRfr2GQ%3DKpwMi6tTrkkTno%2BpuTYwhD9%3Dt8Hkm_Ggjh47fr%2BQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
