Liberica JDK 16.0.2+7 Release Notes

The full version string for this update release is 16.0.2+7 (OpenJDK 16+7 baseline). The version number is 16.

Liberica JDK 16.0.2+7

Liberica is a certified, Java SE 16-compliant distribution of OpenJDK 16 which works on server (Linux x86_64, Linux ARM64, Solaris SPARC, Solaris x64, Windows 64), desktop (Windows 64, Windows 32, Mac, Linux x86_64), and embedded devices (Linux ARM64, Linux ARMv7, including Raspberry Pi 2, 3, 4 (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 16.
  • Linux ARMv7 distribution contains Device IO API compiled for Raspberry Pi.

Please refer to the Oracle JDK 16 release notes for further information on JDK 16 features. This document further outlines the peculiarities of Liberica distribution as compared to Oracle JDK 16 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 6.x, 7.x (x86, x86_64, ARMv7, ARMv8)
  • Alpine Linux 3.7+
  • SUSE Linux Enterprise 12, 15 and tumbleweed (x86_64, ARMv8)
  • Apple macOS 10.11+
  • Microsoft Windows 2019, Windows 2016, Windows 2012 R2, Windows 10, Windows 8, Windows 7 (64 and 32 bit)

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 16 distribution

Liberica JDK 16 are distributed as .rpm, .zip, .deb and .tar.gz packages. Please select the one which is most appropriate for your purposes.

Liberica 16 introduced all new features supported by OpenJDK 16.

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 16 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 16 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 16 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 and 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
sudo ln -s

Issues fixed

Issue Description
8023980 JCE doesn't provide any class to handle RSA private key in PKCS#1
8073446 TimeZone getOffset API does not return a dst offset between years 2038-2137
8196415 Disable SHA-1 Signed JARs
8211227 Inconsistent TLS protocol version in debug output
8225081 Remove Telia Company CA certificate expiring in April 2021
8241248 NullPointerException in
8256157 Improve bytecode assembly
8256491 Better HTTP transport
8257001 Improve HTTP client support
8258414 OldObjectSample events too expensive
8258432 Improve file transfers
8258457 testlibrary_tests/ctw/ fails with InvalidPathException on windows
8258753 StartTlsResponse.close() hangs due to synchronization issues
8259627 Potential memory leaks in JVMTI after JDK-8227745
8259662 Don't wrap SocketExceptions into SSLExceptions in SSLSocketImpl
8260204 Update the release version and release date after forking April CPU21_04
8260236 better init AnnotationCollector _contended_group
8260308 Update LogCompilation junit to 4.13.1
8260401 StackOverflowError on open WindowsPreferences
8260453 Improve Font Bounding
8260960 Signs of jarsigner signing
8260967 Better jar file validation
8261183 Follow on to Make lists of normal filenames
8261354 SIGSEGV at MethodIteratorHost
8261355 No data buffering in SunPKCS11 Cipher encryption when the underlying mechanism has no padding
8261505 Test test/hotspot/jtreg/gc/parallel/ killed by Linux OOM Killer
8261779 JCK test api/javax_crypto/EncryptedPrivateKeyInfo/Ctor4.html is failing with assertion error when assertions enabled
8261914 IfNode::fold_compares_helper faces non-canonicalized bool when running JRuby JSON workload
8261916 gtest/ vmErrorTest.unimplemented1_vm_assert failed
8262110 DST starts from incorrect time in 2038
8262295 C2: Out-of-Bounds Array Load from Clone Source
8262365 Update GStreamer to version 1.18.3
8262366 Update glib to version 2.66.7
8262380 Enhance XML processing passes
8262403 Enhanced data transfers
8262410 Enhanced rules for zones
8262446 DragAndDrop hangs on Windows
8262477 Enhance String Conclusions
8262829 Native crash in Win32PrintServiceLookup.getAllPrinterNames()
8262844 (fs) FileStore.supportsFileAttributeView might return false negative in case of ext3
8262899 TestRedirectLinks fails
8262967 Improve Zip file support
8263030 Remove Shenandoah leftovers from ReferenceProcessor
8263069 Exclude some failing tests from security/infra/java/security/cert/CertPathValidator
8263111 Enhance String Conclusions
8263136 C4530 was reported from VS 2019 at access bridge
8263311 Watch registry changes for remote printers update instead of polling
8263430 Uninitialized Method* variables after JDK-8233913
8263557 Possible NULL dereference in Arena::destruct_contents()
8263558 Possible NULL dereference in fast path arena free if ZapResourceArea is true
8263564 Consolidate POSIX code for runtime exit support: os::shutdown, os::abort and os::die
8263587 C2: JVMS not cloned when needs_clone_jvms() is true
8263968 CDS: java/lang/ModuleLayer.EMPTY_LAYER should be singleton
8264047 Duplicate global variable 'jvm' in libjavajpeg and libawt
8264066 Enhance compiler validation
8264079 Improve abstractions
8264374 Shenandoah: Remove leftover parallel reference processing argument
8264460 Improve NTLM support
8264786 [macos] All Swing/AWT apps cause Allow Notifications prompt to appear when app is launched
8265201 JarFile.getInputStream not validating invalid signed jars
8265204 Update the milestone for JDK16.0.2
8265239 Shenandoah: Shenandoah heap region count could be off by 1
8265531 doc/ should mention homebrew install freetype
8265666 Enable AIX build platform to make external debug symbols
8266205 Update milestone to fcs for jdk16.0.2+4
8266288 assert root method not found in witnessed_reabstraction_in_supers is too strong
8266802 Shenandoah: Round up region size to page size unconditionally
8267100 [BACKOUT] JDK-8196415 Disable SHA-1 Signed JARs
8267117 sun/hotspot/whitebox/ fails on Ice Lake
8267235 [macos_aarch64] InterpreterRuntime::throw_pending_exception messing up LR results in crash
8267345 VM crashes during dumping classlist with -Xshare:dump option
8267773 PhaseStringOpts::int_stringSize doesn't handle min_jint correctly
8267842 SIGSEGV in get_current_contended_monitor
8268173 Wrong GA date in JDK 11.0.12 and 16.0.2 versions