src/jdk.management/share/classes/com/sun/management/internal/PlatformMBeanProviderImpl.java

@@ -163,43 +163,47 @@
                          threadMBean);
              }
          });
  
          /**
-          * VirtualThreadSchedulerMXBean.
+          * VirtualThreadSchedulerMXBean registered when using JDK's virtual thread scheduler.
           */
-         initMBeanList.add(new PlatformComponent<VirtualThreadSchedulerMXBean>() {
-             private final Set<Class<? extends VirtualThreadSchedulerMXBean>> mbeanInterfaces =
-                     Set.of(VirtualThreadSchedulerMXBean.class);
-             private final Set<String> mbeanInterfaceNames =
-                     Set.of(VirtualThreadSchedulerMXBean.class.getName());
-             private VirtualThreadSchedulerMXBean impl;
- 
-             @Override
-             public Set<Class<? extends VirtualThreadSchedulerMXBean>> mbeanInterfaces() {
-                 return mbeanInterfaces;
-             }
+         PrivilegedAction<String> pa = () -> System.getProperty("jdk.virtualThreadScheduler.implClass");
+         String value = AccessController.doPrivileged(pa);
+         if (value == null) {
+             initMBeanList.add(new PlatformComponent<VirtualThreadSchedulerMXBean>() {
+                 private final Set<Class<? extends VirtualThreadSchedulerMXBean>> mbeanInterfaces =
+                         Set.of(VirtualThreadSchedulerMXBean.class);
+                 private final Set<String> mbeanInterfaceNames =
+                         Set.of(VirtualThreadSchedulerMXBean.class.getName());
+                 private VirtualThreadSchedulerMXBean impl;
+ 
+                 @Override
+                 public Set<Class<? extends VirtualThreadSchedulerMXBean>> mbeanInterfaces() {
+                     return mbeanInterfaces;
+                 }
  
-             @Override
-             public Set<String> mbeanInterfaceNames() {
-                 return mbeanInterfaceNames;
-             }
+                 @Override
+                 public Set<String> mbeanInterfaceNames() {
+                     return mbeanInterfaceNames;
+                 }
  
-             @Override
-             public String getObjectNamePattern() {
-                 return "jdk.management:type=VirtualThreadScheduler";
-             }
+                 @Override
+                 public String getObjectNamePattern() {
+                     return "jdk.management:type=VirtualThreadScheduler";
+                 }
  
-             @Override
-             public Map<String, VirtualThreadSchedulerMXBean> nameToMBeanMap() {
-                 VirtualThreadSchedulerMXBean impl = this.impl;
-                 if (impl == null) {
-                     this.impl = impl = VirtualThreadSchedulerImpls.create();
+                 @Override
+                 public Map<String, VirtualThreadSchedulerMXBean> nameToMBeanMap() {
+                     VirtualThreadSchedulerMXBean impl = this.impl;
+                     if (impl == null) {
+                         this.impl = impl = VirtualThreadSchedulerImpls.create();
+                     }
+                     return Map.of("jdk.management:type=VirtualThreadScheduler", impl);
                  }
-                 return Map.of("jdk.management:type=VirtualThreadScheduler", impl);
-             }
-         });
+             });
+         }
  
          /**
           * OperatingSystemMXBean
           */
          initMBeanList.add(new PlatformComponent<OperatingSystemMXBean>() {