Deployment of custom MBean causes java.net.MalformedURLException: Unsupported protocol: remote+http in JBoss EAP 7.3.0 and later

Issue

When deploying the following custom MBean code, deployment succeeds up to JBoss EAP 7.2.9 but fails for 7.3.0 and later (including 7.4).

public class ConfigService extends ServiceMBeanSupport implements ConfigServiceMBean {
    private static final String JMX_URL = "service:jmx:remote+http://127.0.0.1:9990";

    @Override
    protected void startService() throws Exception {
        JMXServiceURL serviceURL = new JMXServiceURL(JMX_URL);
        try (JMXConnector jmxConnector = JMXConnectorFactory.connect(serviceURL, null)) {  // java.net.MalformedURLException: Unsupported protocol: remote+http on JBoss EAP 7.3.0 or later, but it works up to 7.2.9
            MBeanServerConnection connection = jmxConnector.getMBeanServerConnection();
            ...

Log of reproduction:

16:12:11,980 WARN  [org.jboss.example.mbean.support.ConfigService] (MSC service thread 1-4) WFLYSYSJMX0006: Starting failed jboss.support:name=ConfigBean: java.net.MalformedURLException: Unsupported protocol: remote+http
    at java.management/javax.management.remote.JMXConnectorFactory.newJMXConnector(JMXConnectorFactory.java:366)
    at java.management/javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:269)
    at deployment.SampleMBean.sar//org.jboss.example.mbean.support.ConfigService.startService(ConfigService.java:22)
    at org.jboss.as.system-jmx@7.4.13.GA-redhat-00001//org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:255)
        ...