Same seems to apply to dev-java/openjdk-17.0.6_p10 Using a multihead display, java apps fail to start whenever DISPLAY is something other than :0 or :0.0. openjdk-15 worked fine. Example below using just jconsole; first encountered this using some proprietary Java apps. $ eselect java-vm show user Current user-vm openjdk-bin-17 $ DISPLAY=:0 jconsole [GUI starts fine] $ DISPLAY=:0.3 jconsole Exception in thread "main" java.lang.ExceptionInInitializerError at java.desktop/java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:106) at java.desktop/sun.awt.X11.XToolkit.<clinit>(XToolkit.java:224) at java.desktop/sun.awt.PlatformGraphicsInfo.createToolkit(PlatformGraphicsInfo.java:40) at java.desktop/java.awt.Toolkit.getDefaultToolkit(Toolkit.java:599) at java.desktop/javax.swing.UIManager.getSystemLookAndFeelClassName(UIManager.java:668) at jdk.jconsole/sun.tools.jconsole.JConsole.<clinit>(JConsole.java:60) Caused by: java.lang.NullPointerException: Cannot read the array length because "this.screens" is null at java.desktop/sun.awt.X11GraphicsEnvironment.initDevices(X11GraphicsEnvironment.java:235) at java.desktop/sun.awt.X11GraphicsEnvironment.rebuildDevices(X11GraphicsEnvironment.java:216) at java.desktop/sun.awt.X11GraphicsEnvironment.<init>(X11GraphicsEnvironment.java:201) at java.desktop/sun.awt.PlatformGraphicsInfo.createGE(PlatformGraphicsInfo.java:36) at java.desktop/java.awt.GraphicsEnvironment$LocalGE.createGE(GraphicsEnvironment.java:93) at java.desktop/java.awt.GraphicsEnvironment$LocalGE.<clinit>(GraphicsEnvironment.java:84) ... 6 more The 'Cannot read the array length because "this.screens" is null' error is actually helpful. The first Java program I encountered this with gave no such useful error message at startup :/ From it I found an existing FreeBSD bug (https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264356) and ultimately, a minimal upstream patch that is apparently included in openjdk-17.0.7: https://github.com/openjdk/jdk19/commit/cfc9a881afd300bd7c1ce784287d1669308e89fc Rebuilt openjdk-17.0.6 with that locally and it seems to fix the issue, will submit a PR.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=141ab9e4fa81526f4f05e319329e2943a2e7d5a5 commit 141ab9e4fa81526f4f05e319329e2943a2e7d5a5 Author: Hank Leininger <hlein@korelogic.com> AuthorDate: 2023-05-18 23:18:23 +0000 Commit: Sam James <sam@gentoo.org> CommitDate: 2023-05-20 06:27:47 +0000 dev-java/openjdk: fix multi-screen bug See $BUG, https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264356, https://bugs.openjdk.org/browse/JDK-8299417 Cherry-picked the fix that has landed in the next openjdk release. Signed-off-by: Hank Leininger <hlein@korelogic.com> Closes: https://bugs.gentoo.org/906708 Closes: https://github.com/gentoo/gentoo/pull/31091 Signed-off-by: Sam James <sam@gentoo.org> .../files/openjdk-17.0.6-multihead-fix.patch | 24 ++ dev-java/openjdk/openjdk-17.0.6_p10-r1.ebuild | 325 +++++++++++++++++++++ 2 files changed, 349 insertions(+)
