After remove of deployment scanner the logfile show a weird NullPointerException during startup

Issue

• Removing the deployment-scanner will cause a NullPointerException during start
• After configuration change the following NPE is thown, but the server seems to work correct

ERROR [org.jboss.as.controller.management-operation] (ServerService Thread Pool – 34) WFLYCTL0403: Unexpected failure during execution of the following operation(s): []: java.lang.NullPointerException
at org.jboss.as.controller.AbstractOperationContext$Step.access$300(AbstractOperationContext.java:1185)
at org.jboss.as.controller.AbstractOperationContext.executeResultHandlerPhase(AbstractOperationContext.java:767)
at org.jboss.as.controller.AbstractOperationContext.executeDoneStage(AbstractOperationContext.java:753)
at org.jboss.as.controller.AbstractOperationContext.processStages(AbstractOperationContext.java:680)
at org.jboss.as.controller.AbstractOperationContext.executeOperation(AbstractOperationContext.java:370)
at org.jboss.as.controller.ParallelBootOperationStepHandler$ParallelBootTask.run(ParallelBootOperationStepHandler.java:359)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
at org.jboss.threads.JBossThread.run(JBossThread.java:320)