java.util.logging not working in native image

[dsyer]

import java.util.logging.Logger;

public class Loggers {

	public static void main(String[] args) throws Exception {
		new Loggers().run();
	}

	private void run() throws Exception {
		Logger.getLogger(Loggers.class.getName()).info("Hello World");
	}

}

In a normal JVM:

Oct 09, 2018 4:17:58 PM Loggers run
INFO: Hello World

This app runs with no errors but doesn't log anything in SVM.

[sdeleuze]

This is annoying because Logback and Log4j2 are not working with Substrate VM yet, so making that one supported would at least provide a solution to get logs with Graal native images, which seems a pretty basic need.

[sdeleuze]

Repro project available here: https://github.com/sdeleuze/graal-issues/tree/master/java-util-logging

[pekd]

You could try to add your own Handler that prints log messages to System.out / System.err.

[dsyer]

You could try to add your own Handler that prints log messages to System.out / System.err.

Isn't that what the default ConsoleHandler already does?

[dsyer]

Interestingly, the sample above (same as @sdeleuze 's) works for me if I add --no-server to the native-image command line (similarly it works the first time if there is no existing daemon, and then fails subsequently). So there is something weird about the state in the daemon.

[cstancu]

This is fixed in 1f851ca which will be available in rc14.

[cstancu]

I added some java.util.logging documentation .