EAP6 throws java.lang.IllegalStateException while starting JBoss using CLI in Domain Mode

Issue

• While trying to start a JBoss instance using CLI script in Domain Mode EAP6 throws following Exception:

[Host Controller] 16:57:25,182 ERROR [org.jboss.as.controller.management-operation] (management-handler-thread - 10) JBAS014612: Operation ("start-servers") failed - address: ([("server-group" => "testgroup")]): java.lang.IllegalStateException
[Host Controller]   at org.jboss.as.host.controller.ManagedServer.start(ManagedServer.java:197) [jboss-as-host-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.host.controller.ServerInventoryImpl.startServer(ServerInventoryImpl.java:174) [jboss-as-host-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.host.controller.ServerInventoryImpl.startServer(ServerInventoryImpl.java:158) [jboss-as-host-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.host.controller.DomainModelControllerService$DelegatingServerInventory.startServer(DomainModelControllerService.java:651) [jboss-as-host-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.domain.controller.operations.DomainServerLifecycleHandlers$StartServersLifecycleHandler$1.execute(DomainServerLifecycleHandlers.java:198) [jboss-as-host-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:397) [jboss-as-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.controller.AbstractOperationContext.doCompleteStep(AbstractOperationContext.java:284) [jboss-as-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.controller.AbstractOperationContext.completeStep(AbstractOperationContext.java:211) [jboss-as-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.domain.controller.operations.DomainServerLifecycleHandlers$StartServersLifecycleHandler.execute(DomainServerLifecycleHandlers.java:207) [jboss-as-host-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:397) [jboss-as-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.controller.AbstractOperationContext.doCompleteStep(AbstractOperationContext.java:284) [jboss-as-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.controller.AbstractOperationContext.completeStep(AbstractOperationContext.java:211) [jboss-as-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.domain.controller.operations.coordination.DomainFinalResultHandler.execute(DomainFinalResultHandler.java:75) [jboss-as-host-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:397) [jboss-as-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.controller.AbstractOperationContext.doCompleteStep(AbstractOperationContext.java:284) [jboss-as-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.controller.AbstractOperationContext.completeStep(AbstractOperationContext.java:211) [jboss-as-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.domain.controller.operations.coordination.OperationCoordinatorStepHandler.executeTwoPhaseOperation(OperationCoordinatorStepHandler.java:225) [jboss-as-host-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.domain.controller.operations.coordination.OperationCoordinatorStepHandler.execute(OperationCoordinatorStepHandler.java:118) [jboss-as-host-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.domain.controller.operations.coordination.PrepareStepHandler.execute(PrepareStepHandler.java:85) [jboss-as-host-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:397) [jboss-as-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.controller.AbstractOperationContext.doCompleteStep(AbstractOperationContext.java:284) [jboss-as-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.controller.AbstractOperationContext.completeStep(AbstractOperationContext.java:211) [jboss-as-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.controller.ModelControllerImpl.internalExecute(ModelControllerImpl.java:126) [jboss-as-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.controller.ModelControllerImpl.execute(ModelControllerImpl.java:111) [jboss-as-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler.doExecute(ModelControllerClientOperationHandler.java:139) [jboss-as-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler$1.execute(ModelControllerClientOperationHandler.java:108) [jboss-as-controller-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.protocol.mgmt.AbstractMessageHandler$2$1.doExecute(AbstractMessageHandler.java:296) [jboss-as-protocol-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at org.jboss.as.protocol.mgmt.AbstractMessageHandler$AsyncTaskRunner.run(AbstractMessageHandler.java:518) [jboss-as-protocol-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
[Host Controller]   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146) [rt.jar:1.6.0_24]
[Host Controller]   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.6.0_24]
[Host Controller]   at java.lang.Thread.run(Thread.java:679) [rt.jar:1.6.0_24]
[Host Controller]   at org.jboss.threads.JBossThread.run(JBossThread.java:122) [jboss-threads-2.0.0.GA-redhat-2.jar:2.0.0.GA-redhat-2]
[Host Controller] 

• The CLI command which used is as following:

[domain@localhost:9999 /] /server-group=testgroup:stop-servers()                                   
{
    "outcome" => "success",
    "result" => undefined,
    "server-groups" => undefined
}