I CAN connect to Wildfly with
JConsole
JVisualVM

I cannot connect with
Java Mission Control (JMC).

I believe this is an issue with some new code that fails to recognize that "classLoader" can be null in the Java SE / Eclipse OSI environment

ClassLoader classLoader = WildFlyElytronProvider.class.getClassLoader();

com.oracle.jmc.rjmx.ConnectionException caused by javax.security.sasl.SaslException [Caused by java.lang.NullPointerException]
at com.oracle.jmc.rjmx.internal.RJMXConnection.connect(RJMXConnection.java:406)
at com.oracle.jmc.rjmx.internal.ServerHandle.doConnect(ServerHandle.java:88)
at com.oracle.jmc.rjmx.internal.ServerHandle.connect(ServerHandle.java:78)
at com.oracle.jmc.console.ui.editor.internal.ConsoleEditor$ConnectJob.run(ConsoleEditor.java:73)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
Caused by: javax.security.sasl.SaslException [Caused by java.lang.NullPointerException]
at org.jboss.remoting3.remote.ClientConnectionOpenListener$Capabilities.handleEvent(ClientConnectionOpenListener.java:426)
at org.jboss.remoting3.remote.ClientConnectionOpenListener$Capabilities.handleEvent(ClientConnectionOpenListener.java:242)
at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
at org.xnio.conduits.ReadReadyHandler$ChannelListenerHandler.readReady(ReadReadyHandler.java:66)
at org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:89)
at org.xnio.nio.WorkerThread.run(WorkerThread.java:591)
at ...asynchronous invocation...(Unknown Source)
at org.jboss.remoting3.EndpointImpl.connect(EndpointImpl.java:570)
at org.jboss.remoting3.EndpointImpl.connect(EndpointImpl.java:532)
at org.jboss.remoting3.EndpointImpl.connect(EndpointImpl.java:520)
at org.jboss.remotingjmx.RemotingConnector.internalRemotingConnect(RemotingConnector.java:268)
at org.jboss.remotingjmx.RemotingConnector.internalConnect(RemotingConnector.java:156)
at org.jboss.remotingjmx.RemotingConnector.connect(RemotingConnector.java:103)
at com.oracle.jmc.rjmx.internal.RJMXConnection.connectJmxConnector(RJMXConnection.java:451)
at com.oracle.jmc.rjmx.internal.RJMXConnection.establishConnection(RJMXConnection.java:427)
at com.oracle.jmc.rjmx.internal.RJMXConnection.connect(RJMXConnection.java:399)
... 4 more
Caused by: java.lang.NullPointerException
at org.wildfly.security.WildFlyElytronProvider$ProviderService.getImplementationClass(WildFlyElytronProvider.java:429)
at org.wildfly.security.WildFlyElytronProvider$ProviderService.newInstance(WildFlyElytronProvider.java:413)
at org.wildfly.security.sasl.util.SecurityProviderSaslClientFactory.createSaslClient(SecurityProviderSaslClientFactory.java:94)
at org.wildfly.security.sasl.util.AbstractDelegatingSaslClientFactory.createSaslClient(AbstractDelegatingSaslClientFactory.java:66)
at org.wildfly.security.sasl.util.ProtocolSaslClientFactory.createSaslClient(ProtocolSaslClientFactory.java:50)
at org.wildfly.security.sasl.util.AbstractDelegatingSaslClientFactory.createSaslClient(AbstractDelegatingSaslClientFactory.java:66)
at org.wildfly.security.sasl.util.ServerNameSaslClientFactory.createSaslClient(ServerNameSaslClientFactory.java:50)
at org.wildfly.security.sasl.util.AbstractDelegatingSaslClientFactory.createSaslClient(AbstractDelegatingSaslClientFactory.java:66)
at org.wildfly.security.sasl.util.ServerNameSaslClientFactory.createSaslClient(ServerNameSaslClientFactory.java:50)
at org.wildfly.security.sasl.util.FilterMechanismSaslClientFactory.createSaslClient(FilterMechanismSaslClientFactory.java:102)
at org.wildfly.security.sasl.util.AbstractDelegatingSaslClientFactory.createSaslClient(AbstractDelegatingSaslClientFactory.java:66)
at org.wildfly.security.sasl.util.LocalPrincipalSaslClientFactory.createSaslClient(LocalPrincipalSaslClientFactory.java:76)
at org.wildfly.security.sasl.util.PrivilegedSaslClientFactory.lambda$createSaslClient$0(PrivilegedSaslClientFactory.java:64)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at org.wildfly.security.sasl.util.PrivilegedSaslClientFactory.createSaslClient(PrivilegedSaslClientFactory.java:64)
at org.wildfly.security.auth.client.AuthenticationConfiguration.createSaslClient(AuthenticationConfiguration.java:1348)
at org.wildfly.security.auth.client.AuthenticationContextConfigurationClient.createSaslClient(AuthenticationContextConfigurationClient.java:395)
at org.jboss.remoting3.remote.ClientConnectionOpenListener$Capabilities.handleEvent(ClientConnectionOpenListener.java:420)
at org.jboss.remoting3.remote.ClientConnectionOpenListener$Capabilities.handleEvent(ClientConnectionOpenListener.java:242)
at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
at org.xnio.conduits.ReadReadyHandler$ChannelListenerHandler.readReady(ReadReadyHandler.java:66)
at org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:89)
at org.xnio.nio.WorkerThread.run(WorkerThread.java:591)