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Zing Virtual Machine Release Notes

Release date: December 18, 2020

Version 1.0

Changes made in Zing Virtual Machine 20.12.0.0 are summarized on this page.

What's New

Below is the list of new features and updates introduced in Zing Virtual Machine 20.12.0.0.

October 2020 PSU Release

ZVM 20.12.0.0 incorporates additional non-security changes associated with the October Patch Set Updates (PSU) 2020 OpenJDK 7u285, OpenJDK 8u275, OpenJDK 11.0.9.1, and OpenJDK 13.0.5.1 release contents.

Performance Improvement

ZVM 20.12.0.0 introduces an enhanced induction variable analysis and range checks removal mechanism. Particularly, improved range check elimination capabilities for decrementing loops of the following type:

for (int i = array.length - 1; i >= 0; i--) { array[i] = ... }

Resolved Issues

The following table contains issues resolved in the release of Zing Virtual Machine 20.12.0.0.

Bug ID	Description
ZVM-18035	Backport of JDK-8202837 and JDK-8214513 to Java 8.
ZVM-17938	Setting `InitalHeapSize` and `MaxHeapSize` the same fails in non-ZST mode. This affects applications such as ElasticSearch which insists that Initial Heap Size be equal to Maximum Heap Size.
ZVM-17430	JarFile constructor exception in JDK 11.0.8.
ZVM-17346	System data collected for GC logging could cause oom-killer invocation and kernel panic when java is launched under the root user.

See Also

Last modified: December 18, 2020