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

- [ ] I have searched the [issues](https://github.com/apache/dubbo/issues) 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

```xml
    <bean id="sayHi" class="org.apache.dubbo.samples.provider.GreetingsServiceImpl"/>

    <dubbo:service id="GreetingsServiceRef1" interface="org.apache.dubbo.samples.api.GreetingsService" ref="sayHi">
        <dubbo:method name="sayHi" timeout="1000" retries="3"/>
    </dubbo:service>
```

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

### Expected Behavior

<!-- What do you expect from the above steps？-->

### Actual Behavior

<!-- What actually happens? -->

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

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

ManagedMap parameters = null;
        for (int i = 0; i < nodeList.getLength(); i++) {
            if (!(nodeList.item(i) instanceof Element)) {
                continue;
            }
            Element element = (Element) nodeList.item(i);
            if ("parameter".equals(element.getNodeName())
                    || "parameter".equals(element.getLocalName())) {
                if (parameters == null) {
                    parameters = new ManagedMap();
                }
                String key = resolveAttribute(element, "key", parserContext);
                String value = resolveAttribute(element, "value", parserContext);
                boolean hide = "true".equals(resolveAttribute(element, "hide", parserContext));
                if (hide) {
                    key = HIDE_KEY_PREFIX + key;
                }
                parameters.put(key, new TypedStringValue(value, String.class));
            }
        }
        return parameters;
    }
    @SuppressWarnings("unchecked")
    private static void parseMethods(String id, NodeList nodeList, RootBeanDefinition beanDefinition,
                                     ParserContext parserContext) {
        if (nodeList == null) {
            return;
        }
        ManagedList methods = null;
        for (int i = 0; i < nodeList.getLength(); i++) {