Hi,

the manifest - at least of jruby-complete - contains a JavaSE requirement of the v9 instead of v8.
this is a bug in bnd - transitively from maven-bundle-plugin - which does not ignore module-info.class out of the box, see https://issues.liferay.com/browse/LPS-98289?page=com.atlassian.jira.plugin.system.issuetabpanels%3Aworklog-tabpanel

guess it should be fixed cause today jruby can't be used on java 8 in OSGi.