1. update host-slave.xml - simplify the example
   -<host xmlns="urn:jboss:domain:4.0">
   +<host name="slave" xmlns="urn:jboss:domain:4.0">

$ ./jboss-cli.sh -Djboss.domain.master.address=127.0.0.1

[disconnected /] embed-host-controller --host-config=host-slave.xml --std-out=echo

[domain@embedded /] /host=slave/server-config=server-one:write-attribute(name=socket-binding-port-offset, value=1)

2:22:06,003 ERROR [org.jboss.as.controller.management-operation] (AeshProcess: 2) WFLYCTL0013: Operation
+("write-attribute") failed - address: ([
("host" => "slave"),
("server-config" => "server-one")
]): org.jboss.msc.service.ServiceNotFoundException: Service service jboss.domain.controller.connection not found
at org.jboss.msc.service.ServiceContainerImpl.getRequiredService(ServiceContainerImpl.java:669)
at org.jboss.as.controller.OperationContextImpl$OperationContextServiceRegistry.getRequiredService(OperationCo
+ntextImpl.java:2208)
at org.jboss.as.domain.controller.operations.SyncModelOperationHandlerWrapper.execute(SyncModelOperationHandle
+rWrapper.java:131)
at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:890)
at org.jboss.as.controller.AbstractOperationContext.processStages(AbstractOperationContext.java:659)
at org.jboss.as.controller.AbstractOperationContext.executeOperation(AbstractOperationContext.java:370)
at org.jboss.as.controller.OperationContextImpl.executeOperation(OperationContextImpl.java:1341)
at org.jboss.as.controller.ModelControllerImpl.internalExecute(ModelControllerImpl.java:392)
at org.jboss.as.controller.ModelControllerImpl.execute(ModelControllerImpl.java:204)
at org.jboss.as.controller.ModelControllerImpl$3.execute(ModelControllerImpl.java:659)
at org.jboss.as.controller.ModelControllerImpl$3.execute(ModelControllerImpl.java:649)
at org.jboss.as.controller.client.helpers.DelegatingModelControllerClient.execute(DelegatingModelControllerCli
+ent.java:63)
at org.jboss.as.cli.embedded.ThreadContextsModelControllerClient.execute(ThreadContextsModelControllerClient.j
+ava:59)
at org.jboss.as.cli.handlers.OperationRequestHandler.handle(OperationRequestHandler.java:84)
at org.jboss.as.cli.impl.CommandContextImpl.handle(CommandContextImpl.java:753)
at org.jboss.as.cli.impl.CommandContextImpl.handleSafe(CommandContextImpl.java:799)
at org.jboss.as.cli.impl.CommandContextImpl$2.execute(CommandContextImpl.java:412)
at org.jboss.aesh.console.AeshProcess.run(AeshProcess.java:53)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

{
"outcome" => "failed",
"result" => {},
"failure-description" => {"host-failure-descriptions" => {"slave" => "WFLYCTL0158: Operation handler failed: org.j
+boss.msc.service.ServiceNotFoundException: Service service jboss.domain.controller.connection not found"}},
"rolled-back" => true
}