Chapter 3. Red Hat build of OpenJDK 8.0.372 release notes

The latest Red Hat build of OpenJDK 8 release might include new features. Additionally, the latest release might enhance, deprecate, or remove features that originated from previous Red Hat build of OpenJDK 8 releases.

Red Hat build of OpenJDK new features and enhancements

Review the following release notes to understand new features and feature enhancements that the Red Hat build of OpenJDK 8.0.372 release provides:

Detection of control group (cgroup) v2 host systems in Linux containers

The Red Hat build of OpenJDK 8.0.372 release includes an update to the HotSpot runtime code and the core libraries code in the JDK. This update enables the detection of cgroup v2 host systems when running Red Hat build of OpenJDK within a Linux container.

Previously, from Red Hat build of OpenJDK release 8u202 onward, the container detection code recognized cgroup v1 (legacy) host Linux systems only. Now, from Red Hat build of OpenJDK 8.0.372 onward, Red Hat build of OpenJDK detects both versions of the underlying cgroups pseudo file-system and applies corresponding container limits to the Red Hat build of OpenJDK runtime.

Without this enhancement, when running on a cgroup v2 Linux host system, Red Hat build of OpenJDK would have used the underlying hosts' resource limits instead of applying container resource limits.

See JDK-8305562 (JDK Bug System).

Configuration of third port for remote Java Management Extensions (JMX)

In release Red Hat build of OpenJDK 8.0.372, you can configure a local access port for remote JMX connections by setting the com.sun.management.jmxremote.local.port property.

In previous releases,Red Hat build of OpenJDK selected this local port at random, which could lead to port collisions. The com.sun.management.jmxremote.local.port property works in the same way as the existing properties for configuring the remote access port (com.sun.management.jmxremote.port) and the Remote Method Invocation (RMI) port (com.sun.management.jmxremote.rmi.port).

See JDK-8234484 (JDK Bug System).

Certigna (Dhimyotis) root certificate authority (CA) certificate added

In release Red Hat build of OpenJDK 8.0.372, the cacerts truststore includes the Certigna (Dhimyotis) root certificate:

See JDK-8245654 (JDK Bug System).

Enhanced Swing platform support

In earlier releases of Red Hat build of OpenJDK, HTML object tags rendered embedded in Swing HTML components. With release Red Hat build of OpenJDK 8.0.372, rendering only occurs if you set the new system property swing.html.object to true. By default, the swing.html.object property is set to false.

JDK bug system reference ID: JDK-8296832.