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From Jaikiran Pai <jaiki...@apache.org>
Subject Re: JDK 17 EA build 18 is available
Date Thu, 22 Apr 2021 04:40:44 GMT
Hello Rory,

No issues were observed against our Ant testsuite on a Linux setup with 
JDK 17 build 17-ea+18-1490.

https://ci-builds.apache.org/job/Ant/job/Ant%20Master%20(latest%20EA%20JDK)/71/jdk_axis=jdk17_ea,label_exp=ubuntu/

-Jaikiran


On 20/04/21 3:21 pm, Rory O'Donnell wrote:
>
> *Hi Stefan/Jaikiran, *
>
> *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
>

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