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Azul Zulu Prime Builds of OpenJDK Release Notes

Table of Contents

Looking for Zing? The Azul Zing Virtual Machine is now Azul Zulu Prime Builds of OpenJDK and part of Azul Platform Prime. Learn more.

Release date: December 20, 2021

Changes to the Azul Zulu Prime Builds of OpenJDK (Azul Zulu Prime JVM) made in Azul Platform Prime 21.10.1.0 are summarized on this page.

What’s New

Below is the list of new VM features and updates introduced in Azul Platform Prime 21.12.0.0.

  • Photon OS is now supported.

  • Improved performance of string collation and character iteration. You can enable the use of the custom implementation of RuleBasedCollator using the option -ХХ:+UseModifiedRuleBasedCollator. This option is false by default.

  • Docker images for Prime are now available.

Known Issues

There are no new issues to report in this release.

Resolved Issues

Below is the list of resolved issues in this release. See Resolved Issues for more information on prior releases.

Issue ID Description

ZVM-21048

When -XX:+UseLargePages is used and the number of static huge pages reserved by nr_hugepages is insufficient for the total heap, Prime failed to start. Now it matches OpenJDK behavior and continues as expected.

ZVM-22049

OldGC is not triggered often enough during idle time when NewGCs are occurring.

ZVM-22063

Map OpenJDK command line option UseCountedLoopSafepoints onto KeepSafepointsInCountedLoops.

ZVM-19635

Avoid lock in ByteArrayInputStream.read if it is used as an input of ObjectInputStream.

ZVM-20678

Improved performance of string collation and iteration.