- [ ] I have searched the [issues](https://github.com/apache/dubbo/issues) of this repository and believe that this is not a duplicate.
- [ ] I have checked the [FAQ](https://github.com/apache/dubbo/blob/master/FAQ.md) of this repository and believe that this is not a duplicate.

### Environment

* Dubbo version: xxx
* Operating System version: xxx
* Java version: xxx

### Steps to reproduce this issue

1. xxx
2. xxx
3. xxx

Pls. provide [GitHub address] to reproduce this issue.

### Expected Result

What do you expected from the above steps？

### Actual Result

What actually happens?

If there is an exception, please attach the exception trace:

```
Just put your stack trace here!
```

private static final Logger logger = LoggerFactory.getLogger(DefaultExecutorRepository.class);
    private int DEFAULT_SCHEDULER_SIZE = Runtime.getRuntime().availableProcessors();
    private final ExecutorService SHARED_EXECUTOR = Executors.newCachedThreadPool(new NamedThreadFactory("DubboSharedHandler", true));
    private Ring<ScheduledExecutorService> scheduledExecutors = new Ring<>();
    private ScheduledExecutorService serviceExporterExecutor;
    public ScheduledExecutorService registryNotificationExecutor;
    private ScheduledExecutorService reconnectScheduledExecutor;
    private ScheduledExecutorService serviceDiscveryAddressNotificationExecutor;
    private ScheduledExecutorService metadataRetryExecutor;
    private ConcurrentMap<String, ConcurrentMap<Integer, ExecutorService>> data = new ConcurrentHashMap<>();
    private ExecutorService poolRouterExecutor;
    private static Ring<ExecutorService> executorServiceRing = new Ring<ExecutorService>();
    public DefaultExecutorRepository() {
        for (int i = 0; i < DEFAULT_SCHEDULER_SIZE; i++) {
            ScheduledExecutorService scheduler = Executors.newSingleThreadScheduledExecutor(
                new NamedThreadFactory("Dubbo-framework-scheduler"));
            scheduledExecutors.addItem(scheduler);
            executorServiceRing.addItem(new ThreadPoolExecutor(1, 1,
                0L, TimeUnit.MILLISECONDS,
                new LinkedBlockingQueue<Runnable>(1024), new NamedInternalThreadFactory("Dubbo-state-router-loop", true)
                , new ThreadPoolExecutor.AbortPolicy()));
        }
        poolRouterExecutor = new ThreadPoolExecutor(1, 10, 0L, TimeUnit.MILLISECONDS, new LinkedBlockingQueue<Runnable>(1024),
            new NamedInternalThreadFactory("Dubbo-state-router-pool-router", true), new ThreadPoolExecutor.AbortPolicy());
        serviceExporterExecutor = Executors.newScheduledThreadPool(1, new NamedThreadFactory("Dubbo-exporter-scheduler"));
        serviceDiscveryAddressNotificationExecutor = Executors.newSingleThreadScheduledExecutor(new NamedThreadFactory("Dubbo-SD-address-refresh"));
        registryNotificationExecutor = Executors.newSingleThreadScheduledExecutor(new NamedThreadFactory("Dubbo-registry-notification"));
        metadataRetryExecutor = Executors.newSingleThreadScheduledExecutor(new NamedThreadFactory("Dubbo-metadata-retry"));
    }