Liberica JDK 18.0.1+12 Release Notes


The full version string for this update release is 18.0.1+12. The version number is 18.

Liberica JDK 18.0.1+12

Liberica is a certified, Java SE 18-compliant distribution of OpenJDK 18 which works on server (Linux x86_64, Linux ARM64, Windows 64), desktop (Windows 64, Windows 32, Mac, Linux x86_64), and embedded devices (Linux ARM64, Linux ARMv7, including Raspberry Pi 2 & 3 (ARMv6 hardfloat)). It has the following notable additions:

  • Linux x86_64 version contains experimental support for ZGC.
  • Linux x86_64, ARMv8 and ARMv7 distributions include a choice of Client VM, Server VM and Minimal VM.
  • Alpine Linux x86_64 version is build with musl support.
  • Windows x86_64, Windows x86, Windows ARMv8, Mac, Linux x86_64, Linux x86 and Linux ARMv7 distributions contain OpenJFX 18.
  • Linux ARMv7 distribution contains Device IO API compiled for Raspberry Pi.

Please refer to the Oracle JDK 18.0.1 release notes for further information on JDK 18 features. This document further outlines the peculiarities of Liberica distribution as compared to Oracle JDK 18 distribution.

Supported Server and Desktop configurations

Liberica is supported on the following OSes:

  • Ubuntu Linux 16.04, 18.04, 20.04 (x86, x86_64, ARMv7, ARMv8)
  • Debian Linux 8, 9, 10 (x86, x86_64, ARMv7, ARMv8)
  • Red Hat, Oracle Linux and CentOS 8x, 6.x, 7.x (x86, x86_64, ARMv7, ARMv8)
  • Alpine Linux 3.7+ (x86_64, ARMv8)
  • SUSE Linux Enterprise 12, 15 and tumbleweed (x86_64, ARMv8)
  • Apple macOS 10.11+ (x86_64, ARMv8)
  • Microsoft Windows 2019, Windows 2016, Windows 2012 R2, Windows 10, Windows 8, Windows 7 (x86, x86_64, ARMv8)

It is also known to work on other Linux distributions and Windows versions.

Note: The minimum supported Linux kernel version is 2.6.18 and GLIBC version 2.6. LibericaFX works on all supported Ubuntu versions, Red Hat Linux family starting from 7.x and SUSE versions with GTK3 backend.

Supported Embedded configurations

Liberica is tested and certified on Raspberry Pi 2, 3 and 4 running the following OSes:

  • Raspbian OS (armhf)
  • OpenSUSE (armv8)

It is also known to work with Debian (armhf) and Ubuntu (armhf).

Liberica JDK 18 distribution

Liberica JDK 18 are distributed as .rpm, .zip, .deb and .tar.gz packages. Please select the one which is most appropriate for your purposes.

Liberica JDK 18 introduced all new features supported by OpenJDK 18.

With the introduction of the Jigsaw feature in JDK 9 and Minimal VM it is now possible to create a Runtime that is sufficient to run your application and trim down the size of the Runtime. To generate a Runtime with just the Minimal VM, add --vm=minimal to jlink options.

Liberica JDK continues to provide support for AOT and Graal JIT. Since in OpenJDK 18 builds these features are deemed experimental and deprecated, it is recommended to compile native executables with Liberica Native Image Kit to avoid errors.

By default, the Liberica uses Server VM. Server VM and Client VM can be enabled with -server and -client command line options, respectively. In case the deployment requires to minimize the footprint, it may be beneficial to use Minimal VM, which emphasises on a minimal footprint. It has C1 JIT compiler only, Serial GC and no serviceability features.

LibericaFX for the Raspberry Pi

Liberica JDK 18 come with a bundled LibericaFX implementation, which is based on OpenJFX. The following tables lists Java FX modules status of Liberica distribution

  • Java FX Graphics - works.
  • Java FX Controls - works.
  • Java FX Media - does not work.
  • Java FX Webkit - does not work.

The following pipelines are known to work: EGL, SW (direct framebuffer) and GTK. By default, Liberica tries to use the accelerated EGL pipeline, which requires the presence of EGL libraries. If they are not found, the implementation falls back to software rendering.

Use the following command line options to specify the rendering pipeline:

  • -Dprism.order=sw forces the use of software rendering pipeline. *
  • -Dprism.order=es2 forces the use of EGL pipeline and hardware acceleration. *
  • -Djavafx.platform=gtk if you would like to launch a LibericaFX application using Liberica from X11.

* Not supported on Raspberry Pi 4.

Please refer to the following wiki for more information.

Device IO API for the Raspberry Pi

Liberica JDK 18 comes with a bundled OpenJDK Device I/O (DIO) API implementation module. DIO provides a Java API for accessing Raspberry PI GPIO pins and for communicating with peripheral devices:

  • General Purpose Input/Output (GPIO).
  • Inter-Integrated Circuit Bus (I2C), Serial Peripheral Interface (SPI).
  • Universal Asynchronous Receiver/Transmitter (UART).

Please refer to the following wiki for more information.

Security Baselines

BellSoft Liberica follows the security baselines for Oracle Java SE. Please refer to the Oracle documentation for a list of issues fixed in a given release.

Known Issues

LibericaFX and EGL on Raspbian

As of 2017, the default location of Broadcom libEGL.so and libGLESv2.so has changed in Raspbian OS. If you'd like to leverage hardware EGL acceleration available from Broadcom video drivers in LibericaFX while running a recent Raspbian OS, run the following command:

cd /opt/vc/lib
sudo ln -s libbrcmEGL.so libEGL.so
sudo ln -s libbrcmGLESv2.so libGLESv2.so

Issues fixed

Issue Description
8282099 Cherry-pick WebKit 613.1 stabilization fixes (2)
8281711 Cherry-pick WebKit 613.1 stabilization fixes
8281459 WebKit 613.1 build broken on M1
8278980 Update WebKit to 613.1
8284920 Incorrect Token type causes XPath expression to return empty result
8284548 Unexpected StringIndexOutOfBoundsException can occur for invalid XPath expressions after JDK-8270504
8282397 createTempFile method of java.io.File is failing when called with suffix of spaces character
8282300 Throws NamingException instead of InvalidNameException after JDK-8278972
8281388 Change wrapping of EncryptedPrivateKeyInfo
8278972 Improve URL supports
8278805 Enhance BMP image loading
8278798 Improve supported intrinsic
8278449 Improve keychain support
8278356 Improve file creation
8277672 Better invocation handler handling
8277233 Improve ECDSA signature support
8277227 Better identification of OIDs
8275151 Improved Object Identification
8274221 More definite BER encodings
8272594 Better record of recordings
8272588 Enhanced recording parsing
8272261 Improve JFR recording file processing
8272255 Completely handle MIDI files
8270504 Better Xpath expression handling
8269938 Enhance XML processing passes redux
8281093 Violating Attribute-Value Normalization in the XML specification 1.0
8276990 Memory leak in invoker.c fillInvokeRequest() during JDI operations
8278186 org.jcp.xml.dsig.internal.dom.Utils.parseIdFromSameDocumentURI throws StringIndexOutOfBoundsException when calling substring method
8272996 JNDI DNS provider fails to resolve SRV entries when IPV6 stack is enabled
8277488 Add expiry exception for Digicert (geotrustglobalca) expiring in May 2022
8276819 javax/print/PrintServiceLookup/FlushCustomClassLoader.java fails to free
8281275 Upgrading from 8 to 11 no longer accepts '/' as filepath separator in gc paths
8281262 Windows builds in different directories are not fully reproducible
8281183 RandomGenerator:NextDouble() default behavior partially fixed by JDK-8280950
8280950 RandomGenerator:NextDouble() default behavior non conformant after JDK-8280550 fix
8280550 SplittableRandom#nextDouble(double,double) can return result >= bound
8277795 ldap connection timeout not honoured under contention
8278851 Correct signer logic for jars signed with multiple digestalgs
8280414 Memory leak in DefaultProxySelector
8280123 C2: Infinite loop in CMoveINode::Ideal during IGVN
8258814 Compilation logging crashes for thread suspension / debugging tests
8279412 [JVMCI] failed speculations list must outlive any nmethod that refers to it
8273139 C2: assert(f <= 1 && f >= 0) failed: Incorrect frequency
8279225 [arm32] C1 longs comparison operation destroys argument registers
8279437 [JVMCI] exception in HotSpotJVMCIRuntime.translate can exit the VM
8280910 Update openjdk project in jcheck to "jdk-updates" for jdk18u
8280526 x86_32 Math.sqrt performance regression with -XX:UseSSE=
8279445 Update JMH devkit to 1.34
8278472 Invalid value set to CANDIDATEFORM structure
8274751 Drag And Drop hangs on Windows
8267341 macos attempt_reserve_memory_at(arg1, arg2, true) failure
8279223 Define version in .jcheck/conf
8278384 Bytecodes::result_type() for arraylength returns T_VOID instead of T_INT
8278869 Bump version numbers for OPENJDK 18.0.1