Hi Achim,
yes, this must be related to the update - I had similar problems.
The sonar-maven-plugin must be upgraded to 4.5.1, which you did. And the
remaining issue
No files nor directories matching /var/lib/jenkins/workspace
/org.ops4j.pax.web/samples/war-jetty-web/target/classes
looks like a bug in the plugin or in Sonar itself. The workaround is to
include a dummy class or resource in the affected project to force the
directory to be created (e.g.
.../war-jetty-web/src/main/resources/empty.txt).
Regards,
Harald