<!-- If you need to report a security issue please visit https://github.com/apache/dubbo/security/policy -->

ExtensionLoader cannot be resumed after interruption.

```
java.lang.InterruptedException
  at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1302)
  at java.util.concurrent.CountDownLatch.await(CountDownLatch.java:231)
  at org.apache.dubbo.common.utils.ClassLoaderResourceLoader.loadResources(ClassLoaderResourceLoader.java:55)
  at org.apache.dubbo.common.extension.ExtensionLoader.loadDirectory(ExtensionLoader.java:1005)
  at org.apache.dubbo.common.extension.ExtensionLoader.loadDirectory(ExtensionLoader.java:943)
  at org.apache.dubbo.common.extension.ExtensionLoader.loadExtensionClasses(ExtensionLoader.java:931)
  at org.apache.dubbo.common.extension.ExtensionLoader.getExtensionClasses(ExtensionLoader.java:913)
  at org.apache.dubbo.common.extension.ExtensionLoader.createExtension(ExtensionLoader.java:752)
  at org.apache.dubbo.common.extension.ExtensionLoader.getExtension(ExtensionLoader.java:548)
  at org.apache.dubbo.common.extension.ExtensionLoader.getExtension(ExtensionLoader.java:523)
  at org.apache.dubbo.rpc.protocol.injvm.InjvmInvoker.<init>(InjvmInvoker.java:74)
```
Disposable disposable = (Disposable) wrappedInstance;
                try {
                    disposable.destroy();
                } catch (Exception e) {
                    logger.error("Error destroying extension " + disposable, e);
                }
            }
        }
        cachedInstances.clear();
    }
    private void checkDestroyed() {
        if (destroyed.get()) {
            throw new IllegalStateException("ExtensionLoader is destroyed: " + type);
        }
    }
    public String getExtensionName(T extensionInstance) {
        return getExtensionName(extensionInstance.getClass());
    }
    public String getExtensionName(Class<?> extensionClass) {
        getExtensionClasses();
        return cachedNames.get(extensionClass);
    }
    /**
     * This is equivalent to {@code getActivateExtension(url, key, null)}
     *
     * @param url url
     * @param key url parameter key which used to get extension point names
     * @return extension list which are activated.
     * @see #getActivateExtension(org.apache.dubbo.common.URL, String, String)
     */