Fix StandardSofaRuntimeManager mem leak (#1362)

Signed-off-by: JermaineHua <[email protected]>

Author: CrazyHZM

sofa-boot-project/sofa-boot-core/runtime-sofa-boot/src/main/java/com/alipay/sofa/runtime/client/impl/ClientFactoryImpl.java

@@ -38,6 +38,11 @@ public void registerClient(Class<?> clientType, Object clientInstance) {
         clients.put(clientType, clientInstance);
     }
 
+    @Override
+    public void destroy() {
+        clients.clear();
+    }
+
     @SuppressWarnings("unchecked")
     @Override
     public <T> T getClient(Class<T> clazz) {

sofa-boot-project/sofa-boot-core/runtime-sofa-boot/src/main/java/com/alipay/sofa/runtime/component/impl/StandardSofaRuntimeManager.java

@@ -129,11 +129,13 @@ public void shutdown() throws ServiceRuntimeException {
     @Override
     public void shutDownExternally() throws ServiceRuntimeException {
         try {
+            clientFactoryInternal.destroy();
             AbstractApplicationContext applicationContext = (AbstractApplicationContext) rootApplicationContext;
             // only need shutdown when root context is active
             if (applicationContext.isActive()) {
                 applicationContext.close();
             }
+            rootApplicationContext = null;
             appClassLoader = null;
         } catch (Throwable throwable) {
             throw new ServiceRuntimeException(ErrorCode.convert("01-03100"), throwable);

sofa-boot-project/sofa-boot-core/runtime-sofa-boot/src/main/java/com/alipay/sofa/runtime/spi/client/ClientFactoryInternal.java

@@ -31,4 +31,6 @@ public interface ClientFactoryInternal extends ClientFactory {
      * @param clientInstance client instance
      */
     void registerClient(Class<?> clientType, Object clientInstance);
+
+    void destroy();
 }