wuwen5 commented on issue #7519:
URL: https://github.com/apache/dubbo/issues/7519#issuecomment-1015114884
@AlbumenJ @CrazyHZM 这个问题简单验证了一下，的确是不生效啊。
```TagRouter```
```java
private <T> List<Invoker<T>> filterUsingStaticTag(List<Invoker<T>> invokers,
URL url, Invocation invocation) {
List<Invoker<T>> result;
// Dynamic param
String tag = StringUtils.isEmpty(invocation.getAttachment(TAG_KEY))
? url.getParameter(TAG_KEY) :
invocation.getAttachment(TAG_KEY);
// Tag request
if (!StringUtils.isEmpty(tag)) {
// invoker.getUrl().getParameter(TAG_KEY)这里拿不到值的，详见#9512
result = filterInvoker(invokers, invoker ->
tag.equals(invoker.getUrl().getParameter(TAG_KEY)));
if (CollectionUtils.isEmpty(result) &&
!isForceUseTag(invocation)) {
result = filterInvoker(invokers, invoker ->
StringUtils.isEmpty(invoker.getUrl().getParameter(TAG_KEY)));
}
} else {
result = filterInvoker(invokers, invoker ->
StringUtils.isEmpty(invoker.getUrl().getParameter(TAG_KEY)));
}
return result;
}
```
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