Expected Behavior

Access logging should work.

Actual Behavior

Enabling access logging causes a NullPointerException in AccessLogHandlerH1.write.

Steps to Reproduce

import reactor.core.publisher.Mono;
import reactor.netty.DisposableServer;
import reactor.netty.http.HttpProtocol;
import reactor.netty.http.server.HttpServer;

public class AccessLoggingApplication {

	public static void main(String[] args) {
		System.setProperty("reactor.netty.http.server.accessLogEnabled", "true");
		DisposableServer server = HttpServer.create().port(8080).protocol(HttpProtocol.HTTP11, HttpProtocol.H2C)
				.handle((request, response) -> response.sendString(Mono.just("hello"))).bindNow();
		server.onDispose().block();
	}

}

Run the above and make an HTTP/1.1 request to localhost:8080 such as curl localhost:8080. It also fails when attempting an upgrade to HTTP/2 such as curl --http2 localhost:8080. It works when assuming prior knowledge and using HTTP/2 from the outset such as curl --http2-prior-knowledge localhost:8080.

Your Environment

• Reactor version(s) used: Reactor Netty 1.0.6, Reactor 3.4.5
• Other relevant libraries versions (eg. netty, ...): Netty 4.1.63
• JVM version (java -version): openjdk version "1.8.0_282"
• OS and version (eg. uname -a): macOS 10.15.7