When I stop application server with Kie server containing container with started scanner, sometimes I get ClassNotFoundException, see attachment.
This exception doesn't seem to have any affect on functionality, but still it should be resolved as it may hide some other problem.
This exception occurs randomly, you may need to start/stop server several times to see it.

Interesting is that class, which wasn't found by classloader, is actually present in Kie server in artefact sisu-guice-3.2.3-no_aop.jar.