docker 容器中jetty启动fail ,查看/var/log/jetty中的日志发现具体错误信息如下：
failed setting default capabilities.
set_caps(CAPS) failed for user ‘jetty‘
Service exit with a return value of 4
解决方法,
docker run -it --cap-add=all .........
docker jetty启动时报错 failed setting default capabilities.
原文：http://www.cnblogs.com/lwmp/p/7241300.html