Skip to main content
Redhat Developers  Logo
  • Products

    Featured

    • Red Hat Enterprise Linux
      Red Hat Enterprise Linux Icon
    • Red Hat OpenShift AI
      Red Hat OpenShift AI
    • Red Hat Enterprise Linux AI
      Linux icon inside of a brain
    • Image mode for Red Hat Enterprise Linux
      RHEL image mode
    • Red Hat OpenShift
      Openshift icon
    • Red Hat Ansible Automation Platform
      Ansible icon
    • Red Hat Developer Hub
      Developer Hub
    • View All Red Hat Products
    • Linux

      • Red Hat Enterprise Linux
      • Image mode for Red Hat Enterprise Linux
      • Red Hat Universal Base Images (UBI)
    • Java runtimes & frameworks

      • JBoss Enterprise Application Platform
      • Red Hat build of OpenJDK
    • Kubernetes

      • Red Hat OpenShift
      • Microsoft Azure Red Hat OpenShift
      • Red Hat OpenShift Virtualization
      • Red Hat OpenShift Lightspeed
    • Integration & App Connectivity

      • Red Hat Build of Apache Camel
      • Red Hat Service Interconnect
      • Red Hat Connectivity Link
    • AI/ML

      • Red Hat OpenShift AI
      • Red Hat Enterprise Linux AI
    • Automation

      • Red Hat Ansible Automation Platform
      • Red Hat Ansible Lightspeed
    • Developer tools

      • Red Hat Trusted Software Supply Chain
      • Podman Desktop
      • Red Hat OpenShift Dev Spaces
    • Developer Sandbox

      Developer Sandbox
      Try Red Hat products and technologies without setup or configuration fees for 30 days with this shared Openshift and Kubernetes cluster.
    • Try at no cost
  • Technologies

    Featured

    • AI/ML
      AI/ML Icon
    • Linux
      Linux Icon
    • Kubernetes
      Cloud icon
    • Automation
      Automation Icon showing arrows moving in a circle around a gear
    • View All Technologies
    • Programming Languages & Frameworks

      • Java
      • Python
      • JavaScript
    • System Design & Architecture

      • Red Hat architecture and design patterns
      • Microservices
      • Event-Driven Architecture
      • Databases
    • Developer Productivity

      • Developer productivity
      • Developer Tools
      • GitOps
    • Secure Development & Architectures

      • Security
      • Secure coding
    • Platform Engineering

      • DevOps
      • DevSecOps
      • Ansible automation for applications and services
    • Automated Data Processing

      • AI/ML
      • Data Science
      • Apache Kafka on Kubernetes
      • View All Technologies
    • Start exploring in the Developer Sandbox for free

      sandbox graphic
      Try Red Hat's products and technologies without setup or configuration.
    • Try at no cost
  • Learn

    Featured

    • Kubernetes & Cloud Native
      Openshift icon
    • Linux
      Rhel icon
    • Automation
      Ansible cloud icon
    • Java
      Java icon
    • AI/ML
      AI/ML Icon
    • View All Learning Resources

    E-Books

    • GitOps Cookbook
    • Podman in Action
    • Kubernetes Operators
    • The Path to GitOps
    • View All E-books

    Cheat Sheets

    • Linux Commands
    • Bash Commands
    • Git
    • systemd Commands
    • View All Cheat Sheets

    Documentation

    • API Catalog
    • Product Documentation
    • Legacy Documentation
    • Red Hat Learning

      Learning image
      Boost your technical skills to expert-level with the help of interactive lessons offered by various Red Hat Learning programs.
    • Explore Red Hat Learning
  • Developer Sandbox

    Developer Sandbox

    • Access Red Hat’s products and technologies without setup or configuration, and start developing quicker than ever before with our new, no-cost sandbox environments.
    • Explore Developer Sandbox

    Featured Developer Sandbox activities

    • Get started with your Developer Sandbox
    • OpenShift virtualization and application modernization using the Developer Sandbox
    • Explore all Developer Sandbox activities

    Ready to start developing apps?

    • Try at no cost
  • Blog
  • Events
  • Videos

What's new in the Red Hat UBI OpenJDK containers

July 19, 2023
Jonathan Dowland
Related topics:
ContainersJavaKubernetes
Related products:
Red Hat build of OpenJDK

Share:

    On June 6, we shipped the latest feature update to the OpenJDK containers with a number of new features:

    • All the containers are rebased onto the latest Red Hat Enterprise Linux (RHEL) point releases: RHEL 8.8 and RHEL 9.2.

    • We’ve improved the handling of the JAVA_APP_NAME configuration option to accept app names containing spaces (OPENJDK-1551).

    • We've updated the included version of Apache Maven from 3.6 to 3.8 (OPENJDK-1464).

    • We shipped the first source containers for the legacy RHEL 7-based OpenJDK containers. For more information on source containers, see this Red Hat Customer Portal article.

    This release also includes the most recent Critical Patch Update (CPU) versions of OpenJDK 8, 11, and 17 (8u372, 11.0.19, and 17.0.7, respectively), which we independently shipped in April.

    Maximum heap size

    Last time we blogged about plans to change the default value for the configuration option JAVA_MAX_MEM_RATIO in the June update of the Universal Base Image (UBI) 8 images.

    This option corresponds to the JVM argument -XX:MaxRAMPercentage, and we planned to change the default from 50.0 to 80.0 (80% of detected RAM) (OPENJDK-559), aligning the default with the UBI9 images.

    Unfortunately, this change didn't make the cut for the June update, and the default value remains 50%. We are now targeting the August update for this change.

    Customers who want to preview the new value can set it explicitly: JAVA_MAX_MEM_RATIO=80.0.

    What's next

    The next OpenJDK CPU is scheduled for July 18, 2023. We'll ship updated containers shortly afterward. As usual, those container updates will be solely for the updated OpenJDK and will not contain changes to the container scripts themselves. Our next container feature update is planned for August.

    We do all our planning in the open on the Red Hat Issue Tracker. If there's something you'd like to see, get in touch, either by leaving a comment or (for an image change) filing an issue.

    Related Posts

    • Overhauling memory tuning in OpenJDK containers updates

    • Build lean Java containers with the new Red Hat Universal Base Images OpenJDK runtime images

    • Range check elimination in loops in OpenJDK's HotSpot JVM

    Recent Posts

    • How Kafka improves agentic AI

    • How to use service mesh to improve AI model security

    • How to run AI models in cloud development environments

    • How Trilio secures OpenShift virtual machines and containers

    • How to implement observability with Node.js and Llama Stack

    What’s up next?

    UBI feature image

    Read the Red Hat Universal Base Images e-book to discover why choosing a base image is strategically important for building cloud-native apps.

    Get the e-book
    Red Hat Developers logo LinkedIn YouTube Twitter Facebook

    Products

    • Red Hat Enterprise Linux
    • Red Hat OpenShift
    • Red Hat Ansible Automation Platform

    Build

    • Developer Sandbox
    • Developer Tools
    • Interactive Tutorials
    • API Catalog

    Quicklinks

    • Learning Resources
    • E-books
    • Cheat Sheets
    • Blog
    • Events
    • Newsletter

    Communicate

    • About us
    • Contact sales
    • Find a partner
    • Report a website issue
    • Site Status Dashboard
    • Report a security problem

    RED HAT DEVELOPER

    Build here. Go anywhere.

    We serve the builders. The problem solvers who create careers with code.

    Join us if you’re a developer, software engineer, web designer, front-end designer, UX designer, computer scientist, architect, tester, product manager, project manager or team lead.

    Sign me up

    Red Hat legal and privacy links

    • About Red Hat
    • Jobs
    • Events
    • Locations
    • Contact Red Hat
    • Red Hat Blog
    • Inclusion at Red Hat
    • Cool Stuff Store
    • Red Hat Summit

    Red Hat legal and privacy links

    • Privacy statement
    • Terms of use
    • All policies and guidelines
    • Digital accessibility

    Report a website issue