Liberica JDK 14.0.2 Release Notes

The full version string for this update release is 14.0.2+13. The version number is 14.

Liberica JDK 14.0.2+13

Liberica is a certified, Java SE 14-compliant distribution of OpenJDK 14 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, Mac, Linux x86_64, Linux x86 and Linux ARMv7 distributions contain OpenJFX 14.
  • Linux ARMv7 distribution contains Device IO API compiled for Raspberry Pi.

Please refer to the Oracle JDK 14.0.2 release notes for further information on JDK 14.0.2 features. This document further outlines the peculiarities of Liberica distribution as compared to Oracle JDK 14.0.2 distribution.

Supported Server and Desktop configurations

Liberica is supported on the following OSes:

  • Ubuntu Linux 16.04, 18.04 (x86, x86_64, ARMv8)
  • Debian Linux 8, 9 (x86, x86_64, ARMv8)
  • Red Hat, Oracle Linux and CentOS 6.x, 7.x (x86, x86_64, 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 14.0.2 distribution

Liberica JDK 14.0.2 are distributed as .rpm, .zip, .deb and .tar.gz packages. Please select the one which is most appropriate for your purposes.

Liberica 14 introduced all new features supported by OpenJDK 14.

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.

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 14.0.2 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 14.0.2 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
JDK-8044365 (dc) failing with ENOMEM when joining group (OS X 10.9)
JDK-8183369 RFC unconformity of HttpURLConnection with proxy
JDK-8220503 Move ShenandoahTerminatorTerminator::should_exit_termination out of header
JDK-8221741 ClassCastException can happen when is used
JDK-8223935 PIT: java/awt/font/ fails on windows10
JDK-8225068 Remove DocuSign root certificate that is expiring in May 2020
JDK-8225069 Remove Comodo root certificate that is expiring in May 2020
JDK-8225216 gc/logging/ doesn't work for Shenandoah
JDK-8227269 Slow class loading when running with JDWP
JDK-8230613 Better ASCII conversions
JDK-8230853 Shenandoah: replace leftover assert(is_in(...)) with rich asserts
JDK-8231118 ARM32: Math tests failures
JDK-8231572 Use -lobjc instead of -fobjc-link-runtime in libosxsecurity
JDK-8231800 Better listing of arrays
JDK-8232014 Expand DTD support
JDK-8233234 Better Zip Naming
JDK-8233239 Enhance TIFF support
JDK-8233255 Better Swing Buttons
JDK-8234032 Improve basic calendar services
JDK-8234042 Better factory production of certificates
JDK-8234146 compiler/jsr292/ times out on SPARC
JDK-8234418 Better parsing with CertificateFactory
JDK-8234836 Improve serialization handling
JDK-8235332 fails with -XX:+StressGCM
JDK-8235833 PosixPlatform.cpp should not include sysctl.h
JDK-8236039 JSSE Client does not accept status_request extension in CertificateRequest messages for TLS 1.3
JDK-8236191 Enhance OID processing
JDK-8236759 ShouldNotReachHere in PhaseIdealLoop::verify_strip_mined_scheduling
JDK-8236851 Shenandoah: More details in Traversal GC event messages
JDK-8236867 Enhance Graal interface handling
JDK-8237117 Better ForkJoinPool behavior
JDK-8237192 Generate stripped/public pdbs on Windows for jdk images
JDK-8237217 Incorrect G1StringDedupEntry type used in StringDedupTable destructor
JDK-8237474 Default SSLEngine should create in server role
JDK-8237543 Shenandoah: More asserts around code roots
JDK-8237592 Enhance certificate verification
JDK-8237632 Shenandoah: accept NULL fwdptr to cooperate with JVMTI and JFR
JDK-8237780 Shenandoah: More reliable nmethod verification
JDK-8237837 Shenandoah: assert(mem == __null) failed: only one safepoint
JDK-8237859 C2: Crash when loads float above range check
JDK-8237879 make 4.3 breaks build
JDK-8237889 Update libxml2 to version 2.9.10
JDK-8237945 CTW: C2 compilation fails with assert(just_allocated_object(alloc_ctl) == ptr) failed: most recent allo
JDK-8237951 CTW: C2 compilation fails with "malformed control flow"
JDK-8238002 Better matrix operations
JDK-8238013 Enhance String writing
JDK-8238190 [JVMCI] Fix single implementor speculation for diamond shapes.
JDK-8238247 CTW runner should sweep nmethods more aggressively
JDK-8238356 CodeHeap::blob_count() overestimates the number of blobs
JDK-8238366 CTW runner closes standard output on exit
JDK-8238385 CTW: C2 (Shenandoah) compilation fails with "Range check dependent CastII node was not removed"
JDK-8238438 SuperWord::co_locate_pack picks memory state of first instead of last load
JDK-8238534 Deep sign macOS bundles before bundle archive is being created
JDK-8238721 Add failing client jtreg tests to the Problem List
JDK-8238756 C2: assert(((n) == __null || !VerifyIterativeGVN || !((n)->is_dead()))) failed: can not use dead node
JDK-8238804 Enhance key handling process
JDK-8238811 C2: assert(i >= req() || i == 0 || is_Region() || is_Phi()) with -XX:+VerifyGraphEdges
JDK-8238843 Enhanced font handing
JDK-8238851 Shenandoah: C1: Resolve into registers of correct type
JDK-8238920 Better Buffer support
JDK-8238925 Enhance WAV file playback
JDK-8239005 [TESTBUG] test/hotspot/jtreg/runtime/StackGuardPages/ exeinvoke.c: must initialize static state before calling do_overflow()
JDK-8239081 Shenandoah: Consolidate C1 LRB and native barriers
JDK-8239142 C2's UseUniqueSubclasses optimization is broken for array accesses
JDK-8239354 Shenandoah: minor enhancements to traversal GC
JDK-8239456 vtable stub generation: assert failure (code size estimate)
JDK-8239786 Shenandoah: print per-cycle statistics
JDK-8239787 AArch64: String.indexOf may incorrectly handle empty strings
JDK-8239798 SSLSocket closes socket both socket endpoints on a SocketTimeoutException
JDK-8239852 java/util/concurrent tests fail with -XX:+VerifyGraphEdges: assert(!VerifyGraphEdges) failed: verification should have failed
JDK-8239868 Shenandoah: ditch C2 node limit adjustments
JDK-8239904 Shenandoah: accumulated penalties should not be over 100% of capacity
JDK-8239926 Shenandoah: Shenandoah needs to mark nmethod's metadata
JDK-8239931 [win][x86] vtable stub generation: assert failure (code size estimate) follow-up
JDK-8240069 Shenandoah: turn more flags diagnostic
JDK-8240070 Shenandoah: remove obsolete ShenandoahCommonGCStateLoads
JDK-8240076 Shenandoah: pacer should cover reset and preclean phases
JDK-8240119 Less Affine Transformations
JDK-8240197 Cannot start JVM when $JAVA_HOME includes CJK characters
JDK-8240215 Shenandoah: remove ShenandoahAllocationTrace
JDK-8240216 Shenandoah: remove ShenandoahTerminationTrace
JDK-8240217 Shenandoah: remove ShenandoahEvacAssist
JDK-8240220 IdealLoopTree::dump_head predicate printing is broken
JDK-8240223 Use consistent predicate order in and with PhaseIdealLoop::find_predicate
JDK-8240227 Loop predicates should be copied to unswitched loops
JDK-8240286 [TESTBUG] Test command error in hotspot/jtreg/compiler/loopopts/superword/
JDK-8240315 Shenandoah: Rename ShLBN::get_barrier_strength()
JDK-8240482 Improved WAV file playback
JDK-8240511 Shenandoah: parallel safepoint workers count should be ParallelGCThreads
JDK-8240534 Shenandoah: ditch debug safepoint timeout adjustment
JDK-8240589 OtherRegionsTable::_num_occupied not updated correctly
JDK-8240629 argfiles parsing broken for argfiles with comment cross 4096 bytes chunk
JDK-8240671 Shenandoah: refactor ShenandoahPhaseTimings
JDK-8240725 Some functions might not work with CJK character
JDK-8240749 Shenandoah: refactor ShenandoahUtils
JDK-8240750 Shenandoah: remove leftover files and mentions of ShenandoahAllocTracker
JDK-8240868 Shenandoah: remove CM-with-UR piggybacking cycles
JDK-8240872 Shenandoah: Avoid updating new regions from start of evacuation
JDK-8240873 Shenandoah: Short-cut arraycopy barriers
JDK-8240915 Shenandoah: Remove unused fields in init mark tasks
JDK-8240917 Shenandoah: Avoid scanning thread code roots twice in all root scanner
JDK-8240948 Shenandoah: cleanup not-forwarded-objects paths after JDK-8240868
JDK-8240972 macOS codesign fail on macOS 10.13.5 or older
JDK-8241062 Shenandoah: rich asserts trigger "empty statement" inspection
JDK-8241081 Shenandoah: Do not modify update-watermark concurrently
JDK-8241093 Shenandoah: editorial changes in flag descriptions
JDK-8241108 Glib improvements
JDK-8241139 Shenandoah: distribute mark-compact work exactly to minimize fragmentation
JDK-8241142 Shenandoah: should not use parallel reference processing with single GC thread
JDK-8241144 Javadoc is not generated for new module jdk.nio.mapmode
JDK-8241296 Segfault in JNIHandleBlock::oops_do()
JDK-8241351 Shenandoah: fragmentation metrics overhaul
JDK-8241379 Update JCEKS support
JDK-8241435 Shenandoah: avoid disabling pacing with "aggressive"
JDK-8241445 Fix copyright in test/jdk/tools/launcher/
JDK-8241520 Shenandoah: simplify region sequence numbers handling
JDK-8241522 Manifest improved jar headers redux
JDK-8241534 Shenandoah: region status should include update watermark
JDK-8241568 (fs) UserPrincipalLookupService.lookupXXX failure with IOE "Operation not permitted"
JDK-8241583 Shenandoah: turn heap lock asserts into macros
JDK-8241586 compiler/cpuflags/ fails on aarch64
JDK-8241603 ZGC: java/lang/management/MemoryMXBean/ crashes on macOS
JDK-8241668 Shenandoah: make ShenandoahHeapRegion not derive from ContiguousSpace
JDK-8241673 Shenandoah: refactor anti-false-sharing padding
JDK-8241675 Shenandoah: assert(n->outcnt() > 0) at shenandoahSupport.cpp:2858 with java/util/Collections/
JDK-8241692 Shenandoah: remove ShenandoahHeapRegion::_reserved
JDK-8241700 Shenandoah: Fold ShenandoahKeepAliveBarrier flag into ShenandoahSATBBarrier
JDK-8241740 Shenandoah: remove ShenandoahHeapRegion::_heap
JDK-8241743 Shenandoah: refactor and inline ShenandoahHeap::heap()
JDK-8241748 Shenandoah: inline MarkingContext TAMS methods
JDK-8241750 x86_32 build failure after JDK-8227269
JDK-8241765 Shenandoah: AARCH64 need to save/restore call clobbered registers before calling keepalive barrier
JDK-8241838 Shenandoah: no need to trash cset during final mark
JDK-8241841 Shenandoah: ditch one of allocation type counters in ShenandoahHeapRegion
JDK-8241842 Shenandoah: inline ShenandoahHeapRegion::region_number
JDK-8241844 Shenandoah: rename ShenandoahHeapRegion::region_number
JDK-8241845 Shenandoah: align ShenandoahHeapRegions to cache lines
JDK-8241900 Loop unswitching may cause dependence on null check to be lost
JDK-8241926 Shenandoah: only print heap changes for operations that directly affect it
JDK-8241983 Shenandoah: simplify FreeSet logging
JDK-8241984 Shenandoah: enhance GCTimer and JFR support
JDK-8241985 Shenandoah: simplify collectable garbage logging
JDK-8242040 Shenandoah: print allocation failure type
JDK-8242041 Shenandoah: adaptive heuristics should account evac reserve in free target
JDK-8242042 Shenandoah: tune down ShenandoahGarbageThreshold
JDK-8242054 Shenandoah: New incremental-update mode
JDK-8242075 Shenandoah: rename ShenandoahHeapRegionSize flag
JDK-8242082 Shenandoah: Purge Traversal mode
JDK-8242083 Shenandoah: split "Prepare Evacuation" tracking into cset/freeset counters
JDK-8242089 Shenandoah: per-worker stats should be summed up, not averaged
JDK-8242101 Shenandoah: coalesce and parallelise heap region walks during the pauses
JDK-8242107 Shenandoah: Fix aarch64 build after JDK-8242082
JDK-8242114 Shenandoah: remove ShenandoahHeapRegion::reset_alloc_metadata_to_shared
JDK-8242130 Shenandoah: Simplify arraycopy-barrier dispatching
JDK-8242136 Better XML namespace handling
JDK-8242211 Shenandoah: remove ShenandoahHeuristics::RegionData::_seqnum_last_alloc
JDK-8242212 Shenandoah: initialize ShenandoahHeuristics::_region_data eagerly
JDK-8242213 Shenandoah: remove ShenandoahHeuristics::_bytes_in_cset
JDK-8242217 Shenandoah: Enable GC mode to be diagnostic/experimental and have a name
JDK-8242227 Shenandoah: transit regions to cset state when adding to collection set
JDK-8242228 Shenandoah: remove unused ShenandoahCollectionSet methods
JDK-8242229 Shenandoah: inline ShenandoahHeapRegion liveness-related methods
JDK-8242267 Shenandoah: regions space needs to be aligned by os::vm_allocation_granularity()
JDK-8242271 Shenandoah: add test to verify GC mode unlock
JDK-8242273 Shenandoah: accept either SATB or IU barriers, but not both
JDK-8242283 Can't start JVM when java home path includes non-ASCII character
JDK-8242301 Shenandoah: Inline LRB runtime call
JDK-8242316 Shenandoah: Turn NULL-check into assert in SATB slow-path entry
JDK-8242353 Shenandoah: micro-optimize region liveness handling
JDK-8242365 Shenandoah: use uint16_t instead of jushort for liveness cache
JDK-8242375 Shenandoah: Remove ShenandoahHeuristic::record_gc_start/end methods
JDK-8242379 [TESTBUG] compiler/loopopts/ fails with release VMs
JDK-8242400 Shenandoah: Restore logging to pre-jdk8241984 format
JDK-8242430 Correct links in javadoc of OperatingSystemMXBean
JDK-8242470 Update Xerces to Version 2.12.1
JDK-8242498 Invalid "sun.awt.TimedWindowEvent" object leads to JVM crash
JDK-8242625 Shenandoah: restore heap logging for Degenerated/Full cycles
JDK-8242638 Shenandoah: restore heap logging for uncommit
JDK-8242641 Shenandoah: clear live data and update TAMS optimistically
JDK-8243008 Shenandoah: TestVolatilesShenandoah test failed on aarch64
JDK-8243059 Build fails when --with-vendor-name contains a comma
JDK-8243238 Shenandoah: explicit GC request should wait for a complete GC cycle
JDK-8243255 Font size is large in JavaFX app with enabled Monocle on Raspberry Pi
JDK-8243291 Shenandoah: no need to retire TLABs at Init Update Refs
JDK-8243301 Shenandoah: ditch ShenandoahAllowMixedAllocs
JDK-8243307 Shenandoah: remove ShCollectionSet::live_data
JDK-8243395 Shenandoah: demote guarantee in ShenandoahPhaseTimings::record_workers_end
JDK-8243460 Shenandoah: purge init_update_refs_prepare counter
JDK-8243463 Shenandoah: ditch total_pause counters
JDK-8243464 Shenandoah: print statistic counters in time order
JDK-8243465 Shenandoah: ditch unused pause_other, conc_other counters
JDK-8243478 Shenandoah: avoid implicit worker_id = 0
JDK-8243487 Shenandoah: make _num_phases illegal phase type
JDK-8243494 Shenandoah: set counters once per cycle
JDK-8243495 Shenandoah: print root statistics for concurrent weak/strong root phases
JDK-8243541 (tz) Upgrade time-zone data to tzdata2020a
JDK-8243573 Shenandoah: rename GCParPhases and related code
JDK-8243578 Shenandoah: Cleanup ShenandoahStringDedup::parallel_oops_do()
JDK-8243848 Shenandoah: Windows build fails after JDK-8239786
JDK-8244180 Shenandoah: carry Phase to ShWorkerTimingsTracker explicitly
JDK-8244200 Shenandoah: build breakages after JDK-8241743
JDK-8244226 Shenandoah: per-cycle statistics contain worker data from previous cycles
JDK-8244326 Shenandoah: global statistics should not accept bogus samples
JDK-8244328 Shenandoah: move ShenandoahThreadLocalData::_disarmed_value initialization
JDK-8244420 Shenandoah: Ensure _disarmed_value offset < 128
JDK-8244551 Shenandoah: Fix racy update of update_watermark
JDK-8244663 Shenandoah: C2 assertion fails in Matcher::collect_null_checks
JDK-8244721 CTW: C2 (Shenandoah) compilation fails with "unexpected infinite loop graph shape"
JDK-8244730 Shenandoah: gc/shenandoah/options/ should only verify the heuristics
JDK-8244732 Shenandoah: move heuristics code to gc/shenandoah/heuristics
JDK-8244737 Shenandoah: move mode code to gc/shenandoah/mode
JDK-8244739 Shenandoah: break superclass dependency on ShenandoahNormalMode
JDK-8244740 Shenandoah: rename ShenandoahNormalMode to ShenandoahSATBMode
JDK-8244821 Shenandoah: disarmed_value is initialized at wrong place
JDK-8244853 The static build of libextnet is missing the JNI_OnLoad_extnet function
JDK-8245047 [PPC64] C2: ReverseBytes + Load always match to unordered Load (acquire semantics missing)
JDK-8245422 Better Pisces rasterizing
JDK-8245461 Shenandoah: refine mode name()-s
JDK-8245463 Shenandoah: refine ShenandoahPhaseTimings constructor arguments
JDK-8245726 Shenandoah: lift/cleanup ShenandoahHeuristics names and properties
JDK-8245754 Shenandoah: ditch ShenandoahAlwaysPreTouch
JDK-8245757 Shenandoah: AlwaysPreTouch should not disable heap resizing or uncommits
JDK-8245812 Shenandoah: compute root phase parallelism
JDK-8245814 Shenandoah: reconsider format specifiers for stats
JDK-8245825 Shenandoah: Remove diagnostic flag ShenandoahConcurrentScanCodeRoots
JDK-8246031 SSLSocket.getSession() doesn't close connection for timeout/ interrupts
JDK-8246097 Shenandoah: limit parallelism in CLDG root handling
JDK-8246100 Shenandoah: walk roots in more efficient order
JDK-8246162 Shenandoah: full GC does not mark code roots when class unloading is off
JDK-8246342 Shenandoah: remove unused ShenandoahIsMarkedNextClosure
JDK-8246613 Choose the default SecureRandom algo based on registration ordering
JDK-8247310 Shenandoah: pacer should not affect interrupt status
JDK-8247358 Shenandoah: reconsider free budget slice for marking
JDK-8247474 Shenandoah: Windows build warning after JDK-8247310
JDK-8247560 Shenandoah: heap iteration holds root locks all the time
JDK-8248505 Unexpected NoSuchAlgorithmException when using secure random impl from BCFIPS provider