JDK 17 Early Access build 18 is available
Rory O'Donnell <[email protected]> Tue, 20 Apr 2021 11:02:00 +0100
| Newsgroups | gmane.comp.java.cruise-control.devel |
|---|---|
| Message-ID | <[email protected]> |
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*Hi Kent,
*
*OpenJDK 17 Early Access build 18****is now available at
**https://jdk.java.net/17 <https://jdk.java.net/17>*
* These early-access , open-source builds are provided under the
o GNU General Public License, version 2, with the Classpath
Exception <https://openjdk.java.net/legal/gplv2+ce.html>
* Release Notes are available at http://jdk.java.net/17/release-notes
<https://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 [1]
*JEP 382 [2]** - 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
rendering glltch.
Rgds,Rory
[1]
https://mail.openjdk.java.net/pipermail/hotspot-gc-dev/2021-April/034745.html
[2] https://openjdk.java.net/jeps/382
--
Rgds, Rory O'Donnell
Quality Engineering Manager
Oracle EMEA, Dublin, Ireland
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<p class="MsoNormal"><br>
<b><span lang="EN-US">Hi Kent, </span><br>
</b></p>
<p class="MsoNormal"><b>OpenJDK 17 Early Access build 18</b><b> </b><b>is
now available at </b><b><a href="https://jdk.java.net/17" moz-do-not-send="true"> https://jdk.java.net/17</a></b></p>
<ul style="margin-top:0cm" type="disc">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0
level1 lfo1"><span style="mso-fareast-language:EN-US">These
early-access , open-source builds are provided under the</span></li>
<ul style="margin-top:0cm" type="circle">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0
level2 lfo1"><span style="mso-fareast-language:EN-US"><a href="https://openjdk.java.net/legal/gplv2+ce.html" moz-do-not-send="true">GNU General Public License, version
2, with the Classpath Exception</a></span></li>
</ul>
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0
level2 lfo1"><span style="mso-fareast-language:EN-US">Release
Notes are available at <a href="https://jdk.java.net/17/release-notes" moz-do-not-send="true">http://jdk.java.net/17/release-notes</a></span></li>
</ul>
<p><br>
<b><b>G1 pauses may be extremely long with EA build JDK-17+18</b><br>
<br>
</b>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
[1]</p>
<p><br>
</p>
<p><b>JEP 382 [2]</b><b> - Starting with build 19, </b><b>JDK 17
for macOS is *temporarily* switched from using OpenGL</b><b> to
using Apple's Metal API</b><b> for Java 2D rendering.</b><br>
</p>
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.
<br>
<br>
If you are running any kind of 2D / Swing/ AWT UI application on
macOS, and see any rendering related problems<br>
starting with JDK 17 b19, please do report them to us along with a
test case and screen shots. <br>
<br>
You may also set "-Dsun.java2d.opengl=true" to re-enable OpenGL -
which implicitly disables Metal - to confirm that it is a Metal
related rendering glltch.<br>
<br>
<br>
Rgds,Rory<br>
<br>
[1] <a class="moz-txt-link-freetext" href="https://mail.openjdk.java.net/pipermail/hotspot-gc-dev/2021-April/034745.html">https://mail.openjdk.java.net/pipermail/hotspot-gc-dev/2021-April/034745.html</a><br>
[2] <a class="moz-txt-link-freetext" href="https://openjdk.java.net/jeps/382">https://openjdk.java.net/jeps/382</a><br>
<br>
<pre class="moz-signature" cols="72">--
Rgds, Rory O'Donnell
Quality Engineering Manager
Oracle EMEA, Dublin, Ireland</pre>
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