NPE when trying to remove an EJB subsystem channel-creation-options resource

Environment

• Red Hat JBoss Enterprise Application Platform (EAP)
  • 7.1.x

Issue

• When trying to remove EJB subsystem through CLI, it is giving NullPointerException:

/subsystem=ejb3/service=remote:remove()
The results:
{
    "outcome" => "failed",
    "failure-description" => "WFLYCTL0158: Operation handler failed: java.lang.NullPointerException",
    "rolled-back" => true
}

• In server.log:

ERROR [org.jboss.as.controller.management-operation] (management-handler-thread - 4) WFLYCTL0013: Operation ("remove") failed - address: ([
    ("subsystem" => "ejb3"),
    ("service" => "remote"),
    ("channel-creation-options" => "MAX_OUTBOUND_MESSAGES")
]): java.lang.NullPointerException
	at org.jboss.as.controller.OperationContextImpl.readResourceFromRoot(OperationContextImpl.java:894)
	at org.jboss.as.controller.OperationContextImpl.readResourceFromRoot(OperationContextImpl.java:884)
	at org.jboss.as.controller.RestartParentResourceHandlerBase.getModel(RestartParentResourceHandlerBase.java:216)
	at org.jboss.as.controller.RestartParentResourceHandlerBase.access$000(RestartParentResourceHandlerBase.java:39)
	at org.jboss.as.controller.RestartParentResourceHandlerBase$1.execute(RestartParentResourceHandlerBase.java:66)
	at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:982)
	at org.jboss.as.controller.AbstractOperationContext.processStages(AbstractOperationContext.java:726)
	at org.jboss.as.controller.AbstractOperationContext.executeOperation(AbstractOperationContext.java:450)
	at org.jboss.as.controller.OperationContextImpl.executeOperation(OperationContextImpl.java:1402)
	at org.jboss.as.controller.ModelControllerImpl.internalExecute(ModelControllerImpl.java:418)
	at org.jboss.as.controller.ModelControllerImpl.lambda$execute$1(ModelControllerImpl.java:243)
...

Resolution

• This was the communityContent from issues.jboss.org is not included.bug, for EAP Content from issues.jboss.org is not included.JIRA is opened to have it fixed in EAP 7.1 CP6

• The issue has been fixed in upstream, so EAP 7.2 already has it fixed.

• There are two workarounds available for this issue as below:

[1] Put the server in admin-only mode before removing the subsystem.

[standalone@localhost:9990 /] reload --admin-only=true
[standalone@localhost:9990 /] /subsystem=ejb3:remove()
{"outcome" => "success"}

[2] Use the embed-server, which is also useful for just building up a profile.

./bin/jboss-cli.sh 

embed-server
/subsystem=ejb3/service=remote:remove()
stop-embedded-server

• embed-server - basically starts an in VM JBoss server in the CLI and then run all of the configuration commands on it and then exit. As opposed to actually starting a JBoss server and then connecting to it, the embedded server just runs within the CLI.

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