It turns out that we really should create an MBeanServer, even if we don't populate it with anything useful, applications might still want to register their own MBeans.

This fix allows Derby 10.4.2.0 to work.

openjdk/sun/management/ManagementFactory.java

@@ -102,7 +102,7 @@ public class ManagementFactory {
     }
 
     public static MBeanServer createPlatformMBeanServer() {
-	throw new Error("Not implemented");
+	return MBeanServerFactory.createMBeanServer();
     }
 
     public static boolean isThreadSuspended(int state) {