siegezhang opened a new issue, #3394:
URL: https://github.com/apache/incubator-shenyu/issues/3394
### Is there an existing issue for this?
- [X] I have searched the existing issues
### Current Behavior
when json body is {},and dubbo method has ParameterType，can not find dubbo
method
in ApacheDubboProxyService genericInvoker method:
` if (StringUtils.isBlank(metaData.getParameterTypes()) ||
ParamCheckUtils.dubboBodyIsEmpty(body)) {
pair = new ImmutablePair<>(new String[]{}, new Object[]{});
} else {
pair = dubboParamResolveService.buildParameter(body,
metaData.getParameterTypes());
}
`
when StringUtils.isBlank(metaData.getParameterTypes() is false, and
ParamCheckUtils.dubboBodyIsEmpty(body) is true（we input an {} to dubbo
method),the dubbo method has parameterTypes,because of:
`
pair = new ImmutablePair<>(new String[]{}, new Object[]{});
`
we lost the parameterTypes,then invoke dubbo throw
java.lang.NoSuchMethodException
### Expected Behavior
_No response_
### Steps To Reproduce
_No response_
### Environment
```markdown
ShenYu version(s):2.4.3
```
### Debug logs
_No response_
### Anything else?
_No response_
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