25.08.301.0

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Release date: January 28, 2026

This release is based on the Azul Zing Build of OpenJDK (Zing) 25.08.300.0 and corresponds to the following OpenJDK versions:

25.08.301.0 includes a performance improvement reducing the impact of pauses during virtual thread stack tracing.

Issue ID Description

Issue ID	Description
ZVM-34474	Open JDK build number for JDK 8 is displayed incorrectly in `java -version` output.

ZVM-34474

Open JDK build number for JDK 8 is displayed incorrectly in java -version output.

Issue ID Description

Issue ID	Description
ZVM-37516	Performance issues associated with `-XX:ProfilePersistCodeProfilesPeriodSec`, when disabled.
ZVM-37432	Stack arguments for partial fast thaw can be processed incorrectly.
ZVM-37171	`-XX:ProfileWorkerThreads` can have a value less than 1. This fix prevents values less than 1.

ZVM-37516

Performance issues associated with -XX:ProfilePersistCodeProfilesPeriodSec, when disabled.

ZVM-37432

Stack arguments for partial fast thaw can be processed incorrectly.

ZVM-37171

-XX:ProfileWorkerThreads can have a value less than 1. This fix prevents values less than 1.