When running XACML-PAP-ADMIN and XACML-PAP-REST on Windows 10. Java jdk1.8.0_144. I get next error:
Error scanning entry META-INF/versions/9/module-info.class from jar file:///D:/Projects/XACML/XACML-PAP-ADMIN/target/xacml-pap-admin-2.0.0-SNAPSHOT/WEB-INF/lib/log4j-api-2.11.0.jar
That could be linked to your version of Jetty, considering it fails on log4j 2.11 jar.
See this question:
log4j 2.9 and later are multi-release jars for Java 9.
Make sure to use a Jetty compatible with that, or use slf4j instead.
来源：https://stackoverflow.com/questions/51999676/unable-to-start-jetty-server-error-scanning-entry-meta-inf-versions-9