Jenkins 2.21 发布了，Jenkins 主要用于持续、自动地构建/测试软件项目，如 CruiseControl 与 DamageControl，监控一些定时执行的任务。
更新如下：
Ask for confirmation before canceling/aborting runs. (issue 30565)
Add newline after the text in userContent/readme.txt. (PR #2532)
Fixed the missing icon in the System Script console. (issue 37814)
Print warnings to system logs and administrative monitors when Jenkins initializarion does not reach the final milestone. (issue 37874, diagnostics for issue-37759)
Developer API: UpdateSite#getJsonSignatureValidator() can be now overriden and used in plugins. (PR #2532)
更新日志：
https://jenkins.io/changelog/
下载地址：https://github.com/jenkinsci/jenkins/archive/jenkins-2.21.zip
来自:开源中国社区
