*Hi David & Richard, *
*OpenJDK 17 Early Access build 18****is now available at
* These early-access , open-source builds are provided under the
o GNU General Public License, version 2, with the Classpath
* Release Notes are available at http://jdk.java.net/17/release-notes
**G1 pauses may be extremely long with EA build JDK-17+18*
*During performance testing we noticed that due to a recent change
(JDK-8262068) GC pauses after a G1 full GC may be extremely slow. The
problem has been fixed with JDK-8264987 and that has already been
integrated. This change will be available with the following EA build
JDK-17+19. For more technical info please see 
*JEP 382 ** - Starting with build 19, **JDK 17 for macOS is
*temporarily* switched from using OpenGL**to using Apple's Metal
API**for Java 2D rendering.*
Heads up to anyone who is testing JDK 17 for running apps on macOS.
Starting with build 19, JDK 17 for macOS is *temporarily* switched from
using OpenGL to using Apple's Metal API for Java 2D rendering.
If you are running any kind of 2D / Swing/ AWT UI application on macOS,
and see any rendering related problems
starting with JDK 17 b19, please do report them to us along with a test
case and screen shots.
You may also set "-Dsun.java2d.opengl=true" to re-enable OpenGL - which
implicitly disables Metal - to confirm that it is a Metal related
Rgds, Rory O'Donnell
Quality Engineering Manager
Oracle EMEA, Dublin, Ireland
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---------- Forwarded message ---------
Date: Thu, Apr 15, 2021 at 8:06 PM
Subject: New candidate JEP: 411: Deprecate the Security Manager for Removal
Cc: <security-dev(a)openjdk.java.net>, <jdk-dev(a)openjdk.java.net>
Summary: Deprecate the Security Manager for removal in a future
release. The Security Manager dates from Java 1.0. It has not been the
primary means of securing client-side Java code for many years, and it
has rarely been used to secure server-side code. To move Java forward,
we intend to deprecate the Security Manager for removal in concert with
the legacy Applet API (JEP 398).
Principal Software Engineer
Red Hat JBoss Middleware
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