Description of problem:
When starting business-central (with example repo enabled), sometimes there is an Error in server log:

ERROR [org.jboss.as.ejb3.invocation] (Thread-96) JBAS014134: EJB Invocation failed on component IOWatchServiceExecutorImpl for method public abstract void org.uberfire.backend.server.io.watch.IOWatchServiceExecutor.execute(org.uberfire.java.nio.file.WatchKey,org.uberfire.backend.server.util.Filter): javax.ejb.EJBException: java.lang.NullPointerException

In this one case, it was preceded by a duplicated message
INFO [org.uberfire.ext.metadata.io.BatchIndex] (EJB default - 1) Starting indexing of default://master@repository1/ ...

See attached log excerpt.

There doesn't seem to be any further problems related to that.

Version-Release number of selected component (if applicable):
6.1 ER6

How reproducible:
seldom

Steps to Reproduce:
1. Start up clean product installation on EAP, with example repo enabled.