Date: Mon, 30 May 2022 20:45:32 +0000 From: bugzilla-noreply@freebsd.org To: java@FreeBSD.org Subject: maintainer-feedback requested: [Bug 264356] java/openjdk17: Exception with multi-screen setup Message-ID: <bug-264356-8522-Fn4qR9gF4p@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-264356-8522@https.bugs.freebsd.org/bugzilla/> References: <bug-264356-8522@https.bugs.freebsd.org/bugzilla/>
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Bugzilla Automation <bugzilla@FreeBSD.org> has asked freebsd-java (Nobody) <java@FreeBSD.org> for maintainer-feedback: Bug 264356: java/openjdk17: Exception with multi-screen setup https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D264356 --- Description --- Starting in OpenJDK 17 (tested on FreeBSD), a call to java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment() will cause a program to throw java.lang.ExceptionInInitializerError if run on a screen that is not the first screen, i.e., :3.0. I am unsure how good the attached fix is, but it does prevent the crash. Basically, the variable screens is null when run on another screen such as :3.1. As the only thing needed is the number of screens, I switched it to use the already defined numScreens. It is easy to duplicate using xephyr: Xephyr :3 -screen 800x600 -screen 800x600 Running the attached java program on screen :3.0 will work. Running it on screen :3.1 throws an exception: Exception in thread "main" java.lang.ExceptionInInitializerError at java.desktop/java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(Graph= icsE nvironment.java:106) at GraphEnv.main(GraphEnv.java:18) Caused by: java.lang.NullPointerException: Cannot read the array length bec= ause "this.screens" is null at java.desktop/sun.awt.X11GraphicsEnvironment.initDevices(X11GraphicsEnvironm= ent. java:235) at java.desktop/sun.awt.X11GraphicsEnvironment.rebuildDevices(X11GraphicsEnvir= onme nt.java:216) at java.desktop/sun.awt.X11GraphicsEnvironment.<init>(X11GraphicsEnvironment.j= ava: 201) at java.desktop/sun.awt.PlatformGraphicsInfo.createGE(PlatformGraphicsInfo.jav= a:36 ) at java.desktop/java.awt.GraphicsEnvironment$LocalGE.createGE(GraphicsEnvironm= ent. java:93) at java.desktop/java.awt.GraphicsEnvironment$LocalGE.<clinit>(GraphicsEnvironm= ent. java:84) at java.desktop/java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(Graph= icsE nvironment.java:106) at GraphEnv.main(GraphEnv.java:18) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Meth= od) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethod= Acce ssorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Delegati= ngMe thodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:568) at jdk.compiler/com.sun.tools.javac.launcher.Main.execute(Main.java:419) at jdk.compiler/com.sun.tools.javac.launcher.Main.run(Main.java:192) at jdk.compiler/com.sun.tools.javac.launcher.Main.main(Main.java:132)
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