/profile=full-ha/subsystem=messaging-activemq/server=default/discovery-group=my_disco:add(jgroups-channel=ee,jgroups-cluster=disco)
{
    "outcome" => "success",
    "result" => undefined,
    "server-groups" => {"other-server-group" => {"host" => {"master" => {"server-three" => {"response" => {
        "outcome" => "success",
        "response-headers" => {
            "operation-requires-reload" => true,
            "process-state" => "reload-required"
        }
    }}}}}}
}
[domain@uranus-0:9990 /] reload --host=master

/profile=full-ha/subsystem=messaging-activemq/server=default/discovery-group=my_disco:write-attribute(name=jgroups-channel,value=ejb)
{
    "outcome" => "failed",
    "failure-description" => {"domain-failure-description" => "WFLYCTL0158: Operation handler failed: java.lang.IllegalStateException: WFLYCTL0365: Capability 'org.wildfly.messaging.activemq.discovery-group.my_disco' is unknown in context 'profile=full-ha'."},
    "rolled-back" => true
}

2018-04-16 16:10:31,044 ERROR [org.jboss.as.controller.management-operation] (management-handler-thread - 1) WFLYCTL0013: Operation ("write-attribute") failed - address: ([
    ("profile" => "full-ha"),
    ("subsystem" => "messaging-activemq"),
    ("server" => "default"),
    ("discovery-group" => "my_disco")
]): java.lang.IllegalStateException: WFLYCTL0365: Capability 'org.wildfly.messaging.activemq.discovery-group.my_disco' is unknown in context 'profile=full-ha'.
        at org.jboss.as.controller.CapabilityRegistry.registerRequirement(CapabilityRegistry.java:212)
        at org.jboss.as.controller.CapabilityRegistry.registerAdditionalCapabilityRequirement(CapabilityRegistry.java:198)
        at org.jboss.as.controller.OperationContextImpl.registerAdditionalCapabilityRequirement(OperationContextImpl.java:1520)
        at org.jboss.as.controller.OperationContextImpl.registerAdditionalCapabilityRequirement(OperationContextImpl.java:1512)
        at org.jboss.as.controller.CapabilityReferenceRecorder$DefaultCapabilityReferenceRecorder.processCapabilityRequirement(CapabilityReferenceRecorder.java:137)
        at org.jboss.as.controller.CapabilityReferenceRecorder$DefaultCapabilityReferenceRecorder.addCapabilityRequirements(CapabilityReferenceRecorder.java:114)
        at org.jboss.as.controller.AttributeDefinition.addCapabilityRequirements(AttributeDefinition.java:1066)
        at org.jboss.as.controller.AbstractWriteAttributeHandler.recordCapabilitiesAndRequirements(AbstractWriteAttributeHandler.java:191)
        at org.jboss.as.controller.AbstractWriteAttributeHandler.execute(AbstractWriteAttributeHandler.java:89)
        at org.jboss.as.controller.operations.global.WriteAttributeHandler.doExecuteInternal(WriteAttributeHandler.java:194)
        at org.jboss.as.controller.operations.global.WriteAttributeHandler.execute(WriteAttributeHandler.java:115)
        at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:982)
        at org.jboss.as.controller.AbstractOperationContext.processStages(AbstractOperationContext.java:726)
        at org.jboss.as.controller.AbstractOperationContext.executeOperation(AbstractOperationContext.java:450)
        at org.jboss.as.controller.OperationContextImpl.executeOperation(OperationContextImpl.java:1408)
        at org.jboss.as.controller.ModelControllerImpl.internalExecute(ModelControllerImpl.java:423)
        at org.jboss.as.controller.ModelControllerImpl.lambda$execute$1(ModelControllerImpl.java:243)
        at org.wildfly.security.auth.server.SecurityIdentity.runAs(SecurityIdentity.java:263)
        at org.wildfly.security.auth.server.SecurityIdentity.runAs(SecurityIdentity.java:229)
        at org.jboss.as.controller.ModelControllerImpl.execute(ModelControllerImpl.java:243)
        at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler.doExecute(ModelControllerClientOperationHandler.java:240)
        at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler.access$400(ModelControllerClientOperationHandler.java:138)
        at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler$1$1.run(ModelControllerClientOperationHandler.java:162)
        at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler$1$1.run(ModelControllerClientOperationHandler.java:158)
        at org.wildfly.security.auth.server.SecurityIdentity.runAs(SecurityIdentity.java:287)
        at org.wildfly.security.auth.server.SecurityIdentity.runAs(SecurityIdentity.java:244)
        at org.jboss.as.controller.AccessAuditContext.doAs(AccessAuditContext.java:254)
        at org.jboss.as.controller.AccessAuditContext.doAs(AccessAuditContext.java:225)
        at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler$1.execute(ModelControllerClientOperationHandler.java:158)
        at org.jboss.as.protocol.mgmt.ManagementRequestContextImpl$1.doExecute(ManagementRequestContextImpl.java:70)
        at org.jboss.as.protocol.mgmt.ManagementRequestContextImpl$AsyncTaskRunner.run(ManagementRequestContextImpl.java:160)
        at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
        at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1985)
        at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1487)
        at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1378)
        at java.lang.Thread.run(Thread.java:748)
        at org.jboss.threads.JBossThread.run(JBossThread.java:485)