Micronaut HttpRequest getUri() behaves different on Tomcat and Netty

[martijndwars]

Task List

• Steps to reproduce provided
• Stacktrace (if present) provided
• Example that reproduces the problem uploaded to Github
• Full description of the issue provided (see below)

Steps to Reproduce

1. Create a new Micronaut project: mn create-app -b gradle_kotlin micronaut-abc
2. Make sure build.gradle.kts mentions runtime("tomcat")
3. Add a controller:

package micronaut.abc;

import io.micronaut.http.HttpRequest;
import io.micronaut.http.annotation.Controller;
import io.micronaut.http.annotation.Get;

@Controller()
public class HelloController {

  @Get("hello")
  public String hello(HttpRequest<?> httpRequest) {
    return httpRequest.getUri().toString();
  }
}

4. Request the page: curl "http://localhost:8080/hello?a=1&b=2"
5. Change the runtime in build.gradle.kts from tomcat to netty.
6. Restart the application, request the page again: curl "http://localhost:8080/hello?a=1&b=2"

Expected Behaviour

Both curl commands should output the same result: "hello?a=1&b=2"

Actual Behaviour

The first curl command (when using tomcat) returns "hello", the second curl command (when using netty) returns "hello?a=1&b=2".

Environment Information

• Operating System: macOS 10.15.7
• Micronaut Version: 2.5.8
• JDK Version: 11