FULL PRODUCT VERSION :
java version "9-ea"
Java(TM) SE Runtime Environment (build 9-ea+174)
Java HotSpot(TM) Server VM (build 9-ea+174, mixed mode, emulated-client)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
Latest EA versions of JDK 9 add logging for Jigsaw problems. It is supposed to be written to System.err, which under Web Start is supposed to be the console

REGRESSION. Last worked in version 9

ADDITIONAL REGRESSION INFORMATION:
java version "9-ea"
Java(TM) SE Runtime Environment (build 9-ea+174)
Java HotSpot(TM) Server VM (build 9-ea+174, mixed mode, emulated-client)

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Enable logging & tracing in Java Control Panel->Advanced->Debugging
2. Compile the attached application into a JAR file
3. Sign the JAR file, give run permissions with a deployment rule set
4. Run as a JWS application

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The application should print

WARNING: --permit-illegal-access will be removed in the next major release
"OpenModuleTest"/
Testing stderr
WARNING: Illegal access by OpenModuleTest (jar://test.jar!OpenModuleTest) to field java.util.TreeMap.comparator (permitted by --permit-illegal-access)
OK
ACTUAL -
Only the lines
Test stderr
OK

are printed

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
test.jnlp
=======

<?xml version="1.0" encoding="utf-8"?>
  <jnlp spec="6.0+" codebase="http://example.com/webstart" href="test.jnlp">
    <information>
      <title>Test app</title>
      <vendor>Anon</vendor>
      <offline-allowed/>
    </information>
    <security>
        <all-permissions/>
    </security>
    <update check="always" policy="always" />
    <resources>
      <j2se version="1.9" java-vm-args="--permit-illegal-access --add-opens=java.base/java.util=ALL-UNNAMED"/>
      <jar href="test.jar" main="true"/>
    </resources>

    <application-desc main-class="OpenModuleTest"/>
  </jnlp>


OpenModuleTest.java
=================

import java.lang.reflect.Field;
import java.util.Comparator;
import java.util.TreeMap;

public class OpenModuleTest {
     public static void main(String... args) {
        System.err.println("Testing stderr");
         for (Field field : TreeMap.class.getDeclaredFields()) {
             if (field.getType() == Comparator.class) {
                 field.setAccessible(true);
                 break;
             }

         }

         System.out.println("OK");
     }
}

---------- END SOURCE ----------