unclear NullPointerException if the deployment-scanner element is removed from the configuration ------------------------------------------------------------------------------------------------ Key: WFCORE-1765 URL: https://issues.jboss.org/browse/WFCORE-1765 Project: WildFly Core Issue Type: Bug Components: Deployment Scanner Affects Versions: 2.0.10.Final Reporter: Wolf-Dieter Fink Assignee: Jason Greene Labels: deployment If the deployment scanner element is removed from the configuration of the standalone server a NullPointerException is logged which is unclear and difficult to find as the stack does not show any hint. Config: {xml} <subsystem xmlns="urn:jboss:domain:deployment-scanner:2.0"> <!-- deployment-scanner path="deployments" relative-to="jboss.server.base.dir" scan-interval="5000" runtime-failure-causes-rollback="${jboss.deployment.scanner.rollback.on.failure:false}"/ --> </subsystem> {xml} Log message: ERROR [org.jboss.as.controller.management-operation] (ServerService Thread Pool -- 34) WFLYCTL0403: Unexpected failure during execution of the following operation(s): []: java.lang.NullPointerException at org.jboss.as.controller.AbstractOperationContext$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)