Failures of undeploy of a partially failed deployment

[domain@localhost:9990 /] undeploy 2e3b75f2-88ff-4eb9-a8b1-9107c452309e.ear --all-relevant-server-groups
Undeploy failed: JBAS010839: Operation failed or was rolled back on all servers.

    public void execute(OperationContext context, ModelNode operation) throws OperationFailedException {
        ModelNode model = context.readResourceForUpdate(PathAddress.EMPTY_ADDRESS).getModel();
...

    private static Resource requireChild(final Resource resource, final PathElement childPath, final PathAddress fullAddress) {
        if (resource.hasChild(childPath)) {
            return resource.requireChild(childPath);
        } else {
            PathAddress missing = PathAddress.EMPTY_ADDRESS;
            for (PathElement search : fullAddress) {
                missing = missing.append(search);
                if (search.equals(childPath)) {
                    break;
                }
            }
            throw ControllerMessages.MESSAGES.managementResourceNotFound(missing);
        }
    }