Server creation on slave fails to return result, but creation succeeds

Have 2 hosts, a DC one (snert) and a Slave, SL (pintsize).

On the DC:

[localhost:9999 /] /host=snert/server-config=newServer4:add(group=main-server-group,auto-start=1)
{
"outcome" => "success",
"result" => undefined,
"compensating-operation" =>

{ "operation" => "remove", "address" => [ ("host" => "snert"), ("server-config" => "newServer4") ] }

}

On the slave:

[localhost:9999 /] /host=pintsize/server-config=newServer5:add(group=main-server-group,auto-start=1)
Communication error: java.util.concurrent.ExecutionException: java.io.EOFException

But the server has been created:

[localhost:9999 /] ls /host=pintsize/server-config=newServer5
path jvm interface

There is no stack trace on the slave, but on the DC:

[Host Controller] 15:20:12,547 ERROR [org.jboss.as.protocol.connection] (pool-1-thread-25) Failed to read a message: java.io.IOException: Failed to handle management operation
[Host Controller] at org.jboss.as.protocol.mgmt.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:63)
[Host Controller] at org.jboss.as.protocol.ConnectionImpl.safeHandleMessage(ConnectionImpl.java:254)
[Host Controller] at org.jboss.as.protocol.ConnectionImpl$1$1.run(ConnectionImpl.java:213)
[Host Controller] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441) [:1.6.0_24]
[Host Controller] at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) [:1.6.0_24]
[Host Controller] at java.util.concurrent.FutureTask.run(FutureTask.java:138) [:1.6.0_24]
[Host Controller] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:98) [:1.6.0_24]
[Host Controller] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:206) [:1.6.0_24]
[Host Controller] at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [:1.6.0_24]
[Host Controller] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [:1.6.0_24]
[Host Controller] at java.lang.Thread.run(Thread.java:680) [:1.6.0_24]
[Host Controller] at org.jboss.threads.JBossThread.run(JBossThread.java:122)
[Host Controller] Caused by: java.lang.NullPointerException
[Host Controller] at org.jboss.as.domain.controller.DomainControllerImpl.execute(DomainControllerImpl.java:354)
[Host Controller] at org.jboss.as.controller.AbstractModelController.execute(AbstractModelController.java:101)
[Host Controller] at org.jboss.as.domain.controller.DomainControllerImpl.execute(DomainControllerImpl.java:219)
[Host Controller] at org.jboss.as.controller.remote.ModelControllerOperationHandlerImpl$ExecuteSynchronousOperation.sendResponse(ModelControllerOperationHandlerImpl.java:187)
[Host Controller] at org.jboss.as.protocol.mgmt.ManagementResponse$2.handle(ManagementResponse.java:119)
[Host Controller] at org.jboss.as.protocol.mgmt.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:59)
[Host Controller] ... 11 more
[Host Controller]