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