RELEASE NOTES FOR: 20
====================================================================================================

Notes generated: Fri Jul 01 02:21:18 CEST 2022

Hint: Prefix bug IDs with https://bugs.openjdk.java.net/browse/ to reach the relevant JIRA entry.

JAVA ENHANCEMENT PROPOSALS (JEP):

  None.

RELEASE NOTES, BY COMPONENT:

  None.

ALL FIXED ISSUES, BY COMPONENT AND PRIORITY:

client-libs:
  (P5) JDK-8284672: Collapse identical catch branches in java.desktop

client-libs/java.awt:
  (P1) JDK-8288332: Tier1 validate-source fails after 8279614
  (P3) JDK-8279614: The left line of the TitledBorder is not painted on 150 scale factor
  (P4) JDK-8265586: [windows] last button is not shown in AWT Frame with BorderLayout and MenuBar set.
  (P4) JDK-8289238: Refactoring changes to PassFailJFrame Test Framework
  (P5) JDK-8288993: Make AwtFramePackTest generic by removing @requires tag

client-libs/javax.swing:
  (P3) JDK-8012675: javax.swing.JEditorPane is unclear on the handling of unsupported HTML script tags
  (P4) JDK-8284619: javax/swing/JTable/8236907/LastVisibleRow.java failed with "Test Case Failed!!, Last Row not Visible!!!"
  (P4) JDK-8288707: javax/swing/JToolBar/4529206/bug4529206.java: setFloating does not work correctly
  (P4) JDK-8287743: javax/swing/text/CSSBorder/6796710/bug6796710.java failed

core-libs:
  (P4) JDK-8288594: Address possibly lossy conversions in java.base FloatToDecimal
  (P4) JDK-8284858: Start of release updates for JDK 20

core-libs/java.lang:
  (P4) JDK-8288021: Add hard test cases to jdk.internal.math.DoubleToDecimalChecker
  (P5) JDK-8289078: Make STARTTIME_ANY and STARTTIME_PROCESS_UNKNOWN fields static in ProcessHandleImpl
  (P5) JDK-8288628: Unnecessary Hashtable usage in ConditionalSpecialCasing

core-libs/java.lang.invoke:
  (P2) JDK-8288425: Footprint regression due MH creation when initializing StringConcatFactory
  (P4) JDK-8288011: StringConcatFactory: Split application of stringifiers

core-libs/java.lang:class_loading:
  (P3) JDK-8287917: System.loadLibrary does not work on Big Sur if JDK is built with macOS SDK 10.15 and earlier

core-libs/java.lang:reflect:
  (P4) JDK-8266670: Better modeling of access flags in core reflection
  (P4) JDK-8288573: Make Executable.getParameterCount() actually abstract
  (P4) JDK-8284942: Proxy building can just iterate superinterfaces once
  (P4) JDK-8288227: Refactor annotation implementation to use pattern matching for instanceof

core-libs/java.net:
  (P3) JDK-8286171: HttpClient/2 : Expect:100-Continue blocks indefinitely when response is not 100 
  (P4) JDK-8288746: HttpClient resources could be reclaimed more eagerly
  (P4) JDK-8289291: HttpServer sets incorrect value for "max" parameter in Keep-Alive header value
  (P4) JDK-8276798: HttpURLConnection sends invalid HTTP request
  (P4) JDK-8286962: java/net/httpclient/ServerCloseTest.java failed once with ConnectException 
  (P4) JDK-8287904: Reduce runtime of java.net microbenchmarks
  (P5) JDK-8288330: Avoid redundant ConcurrentHashMap.get call in Http2ClientImpl.deleteConnection
  (P5) JDK-8288468: Avoid redundant HashMap.get call in NegotiateAuthentication.firstToken
  (P5) JDK-8285521: Minor improvements in java.net.URI

core-libs/java.nio:
  (P4) JDK-8288515: (ch) Unnecessary use of Math.addExact() in java.nio.channels.FileLock.overlaps()
  (P4) JDK-8288080: (fc) FileChannel::map for MemorySegments should state it always throws UOE
  (P4) JDK-8288687: (fc) Unix version ofFileChannelImpl.transferTo0() should should return IOS_UNSUPPORTED if not Linux, macOS, nor AIX
  (P4) JDK-6980847: (fs) Files.copy needs to be "tuned"
  (P4) JDK-8286160: (fs) Files.exists returns unexpected results with C:\pagefile.sys because it's not readable
  (P4) JDK-8289095: (fs) UnixCopyFile build error on linux-x86
  (P4) JDK-8289073: (fs) UnsatisfiedLinkError for sun.nio.fs.UnixCopyFile.bufferedCopy0()
  (P4) JDK-8287580: (se) CancelledKeyException during channel registration
  (P4) JDK-8287905: Reduce runtime of java.nio microbenchmarks
  (P5) JDK-8285519: Change usages of TimeUnit.convert to TimeUnit.toXXX

core-libs/java.text:
  (P4) JDK-8288667: Reduce runtime of java.text microbenchmarks

core-libs/java.time:
  (P4) JDK-8288673: Reduce runtime of java.time microbenchmarks

core-libs/java.util:
  (P2) JDK-8288173: JDK-8202449 fix causes conformance test failure : api/java_util/Random/RandomGenerator/NextFloat.html

core-libs/java.util.jar:
  (P4) JDK-8282036: Change java/util/zip/ZipFile/DeleteTempJar.java to stop HttpServer cleanly in case of exceptions
  (P5) JDK-8287696: Avoid redundant Hashtable.containsKey call in JarVerifier.doneWithMeta

core-libs/java.util.stream:
  (P4) JDK-8284640: CollectorImpl class could be a record class

core-libs/java.util:i18n:
  (P3) JDK-8288979: Improve CLDRConverter run time
  (P4) JDK-8288378: [BACKOUT] DST not applying properly with zone id offset set with TZ env variable
  (P4) JDK-8285838: DST not applying properly with zone id offset set with TZ env variable
  (P4) JDK-8287902: UnreadableRB case in MissingResourceCauseTest is not working reliably on Windows

core-libs/javax.lang.model:
  (P4) JDK-8286034: Add SourceVersion.RELEASE_20

core-libs/javax.naming:
  (P4) JDK-8288207: Enhance MalformedURLException in Uri.parseCompat
  (P4) JDK-8287672: jtreg test com/sun/jndi/ldap/LdapPoolTimeoutTest.java fails intermittently in nightly run
  (P4) JDK-8288895: LdapContext doesn't honor set referrals limit

core-svc/java.lang.management:
  (P4) JDK-8288599: com/sun/management/OperatingSystemMXBean/TestTotalSwap.java: Expected total swap size ... but getTotalSwapSpaceSize returned ...

core-svc/javax.management:
  (P5) JDK-8287924: Avoid redundant HashMap.containsKey call in EnvHelp.mapToHashtable

core-svc/tools:
  (P4) JDK-8288724: Prevent NullPointerException in serviceability/tmtools/jstack/DaemonThreadTest.java if jstack process fails

docs:
  (P4) JDK-8288740: Change incorrect documentation for sjavac flag

globalization/locale-data:
  (P4) JDK-8287868: Localized names update in COMPAT locale provider

hotspot:
  (P4) JDK-8288181: AArch64: clean up out-of-date comments
  (P4) JDK-8287926: AArch64: intrinsics for divideUnsigned and remainderUnsigned methods in java.lang.Integer and java.lang.Long 
  (P4) JDK-8288094: cleanup old _MSC_VER handling

hotspot/compiler:
  (P2) JDK-8289421: No-PCH build for Minimal VM was broken by JDK-8287001
  (P3) JDK-8288781: C1: LIR_OpVisitState::maxNumberOfOperands too small
  (P4) JDK-8289094: [JVMCI] reduce JNI overhead and other VM rounds trips in JVMCI
  (P4) JDK-8287984: AArch64: [vector] Make all bits set vector sharable for match rules
  (P4) JDK-8287028: AArch64: [vectorapi] Backend implementation of VectorMask.fromLong with SVE2
  (P4) JDK-8288478: AArch64: Clean up whitespace in assembler_aarch64.hpp
  (P4) JDK-8287349: AArch64: Merge LDR instructions to improve C1 OSR performance
  (P4) JDK-8288300: AArch64: Remove the assertion in fmovs/fmovd(FloatRegister, FloatRegister)
  (P4) JDK-8287835: Add support for additional float/double to integral conversion for x86
  (P4) JDK-8287001: Add warning message when fail to load hsdis libraries
  (P4) JDK-8283775: better dump: VM support for graph querying in debugger with BFS traversal and node filtering
  (P4) JDK-8286197: C2: Optimize MemorySegment shape in int loop
  (P4) JDK-8288281: compiler/vectorapi/VectorFPtoIntCastTest.java failed with "IRViolationException: There were one or multiple IR rule failures."
  (P4) JDK-8288669: compiler/vectorapi/VectorFPtoIntCastTest.java still fails with "IRViolationException: There were one or multiple IR rule failures."
  (P4) JDK-8289071: Compute allocation sizes of stubs and nmethods outside of lock protection
  (P4) JDK-8287525: Extend IR annotation with new options to test specific target feature. 
  (P4) JDK-8287801: Fix test-bugs related to stress flags
  (P4) JDK-8288750: IGV: Improve Shortcuts
  (P4) JDK-8263384: IGV: Outline should highlight the Graph that has focus
  (P4) JDK-8283612: IGV: remove Graal module
  (P4) JDK-8287094: IGV: show node input numbers in edge tooltips
  (P4) JDK-8288480: IGV: toolbar action is not applied to the focused graph
  (P4) JDK-8288421: IGV: warn user about all unreachable nodes
  (P4) JDK-8287373: remove unnecessary paddings in generated code 
  (P4) JDK-8283091: Support type conversion between different data sizes in SLP
  (P4) JDK-8286104: use aggressive liveness for unstable_if traps
  (P4) JDK-8287647: VM debug support: find node by pattern in name or dump
  (P4) JDK-8283726: x86_64 intrinsics for compareUnsigned method in Integer and Long

hotspot/gc:
  (P4) JDK-8280454: G1: ClassLoaderData verification keeps CLDs live that causes problems with VerifyDuringGC during Remark
  (P4) JDK-8289138: G1: Remove redundant is-marking-active checks in C1 barrier
  (P4) JDK-8285364: Remove REF_ enum for java.lang.ref.Reference 
  (P4) JDK-8287771: Remove useless G1 After GC summary refinement and sampling thread times
  (P4) JDK-8288203: runtime/ClassUnload/UnloadTestWithVerifyDuringGC.java fails with release VMs
  (P4) JDK-8287227: Shenandoah: A couple of virtual thread tests failed with iu mode even without Loom enabled.
  (P4) JDK-8287818: Shenandoah: adapt nmethod arming from Loom
  (P4) JDK-8284404: Too aggressive sweeping with Loom

hotspot/jfr:
  (P3) JDK-8288663: JFR: Disabling the JfrThreadSampler commits only a partially disabled state
  (P3) JDK-8288982: JFR: Log event streaming actions
  (P3) JDK-8288685: JFR: Use static methods for Active Recording and Active Setting events
  (P5) JDK-8280235: Deprecated flag FlightRecorder missing from VMDeprecatedOptions test

hotspot/jvmti:
  (P4) JDK-8289098: clean up ported serviceability/jvmti tests

hotspot/other:
  (P4) JDK-8288005: HotSpot build with disabled PCH fails for Windows AArch64

hotspot/runtime:
  (P1) JDK-8289129: [BACKOUT] JDK-8287281 adjust guarantee in Handshake::execute for the case of target thread being current
  (P3) JDK-8287007: [cgroups] Consistently use stringStream throughout parsing code
  (P3) JDK-8287281: adjust guarantee in Handshake::execute for the case of target thread being current 
  (P3) JDK-8284997: arm32 build crashes since JDK-8283326
  (P3) JDK-8279047: Remove expired flags in JDK 20
  (P4) JDK-8288648: (jni spec) Description of 3rd parameter to AttachCurrentThread is confusing
  (P4) JDK-8288719: [arm32] SafeFetch32 thumb interleaving causes random crashes
  (P4) JDK-8284849: Add deoptimization to unified logging
  (P4) JDK-8288651: CDS test HelloUnload.java should not use literal string as ClassLoader name
  (P4) JDK-8288064: Class initialization locking
  (P4) JDK-8288976: classfile parser 'wrong name' error message has the names the wrong way around
  (P4) JDK-8289006: Cleanup from thread.hpp split
  (P4) JDK-8288601: Consolidate static/dynamic archive tables
  (P4) JDK-8287011: Improve container information
  (P4) JDK-8288003: log events for os::dll_unload
  (P4) JDK-8288926: make runtime/logging/DeoptStats.java more reliable
  (P4) JDK-8289477: Memory corruption with CPU_ALLOC, CPU_FREE on muslc
  (P4) JDK-8288623: Move Continuation classes out of javaClasses.hpp
  (P4) JDK-8288537: Move Devirtualizer out of hotspot/share/memory/iterator.hpp
  (P4) JDK-8289182: NMT: MemTracker::baseline should return void
  (P4) JDK-8271252: os::reserve_memory should not use mtOther as default NMT flag
  (P4) JDK-8288935: Remove excessive includes introduced in loom
  (P4) JDK-8288443: Simplify vmClasses::resolve_all()
  (P4) JDK-8288752: Split thread implementation files
  (P4) JDK-8288134: Super class names don't have envelopes
  (P4) JDK-8289147: unify os::infinite_sleep on posix platforms
  (P4) JDK-8288556: VM crashes if it gets sent SIGUSR2 from outside
  (P4) JDK-8288282: Zero-release build is broken after JDK-8279047 due to UseHeavyMonitors is read-only

hotspot/svc-agent:
  (P4) JDK-8286397: Address possibly lossy conversions in jdk.hotspot.agent
  (P5) JDK-8289126: Cleanup unnecessary null comparison before instanceof check in jdk.hotspot.agent
  (P5) JDK-8135292: Remove duplicate code in <OS>Address.java in SA

hotspot/test:
  (P4) JDK-8287124: RenaissanceStressTest.java failed

infrastructure:
  (P4) JDK-8288114: Update JIRA link in vcs.xml

infrastructure/build:
  (P1) JDK-8288238: Add missing file jdk.incubator.concurrent-J.sym.txt
  (P2) JDK-8287906: Rewrite of GitHub Actions (GHA) sanity tests
  (P3) JDK-8288396: Always create reproducible builds
  (P4) JDK-8288399: MacOS debug symbol files not always deterministic in reproducible builds
  (P4) JDK-8288195: Prepare build system for GHA changes
  (P4) JDK-8288499: Restore cancel-in-progress in GHA
  (P4) JDK-8286038: Update --release 19 symbol information for JDK 19 build 26
  (P4) JDK-8288609: Update --release 19 symbol information for JDK 19 build 28

other-libs/other:
  (P4) JDK-8288495: [test] Make OutputAnalyzer exception more informative
  (P5) JDK-8288140: Avoid redundant Hashtable.get call in Signal.handle

security-libs:
  (P4) JDK-8286395: Address possibly lossy conversions in java.security.jgss
  (P4) JDK-8286389: Address possibly lossy conversions in jdk.crypto.ec
  (P4) JDK-8285263: Minor cleanup could be done in java.security

security-libs/java.security:
  (P1) JDK-8288270: Tier1 build failures after JDK-8287178
  (P3) JDK-8224768: Test ActalisCA.java fails
  (P3) JDK-8288132: Update test artifacts in QuoVadis CA interop tests
  (P3) JDK-8288616: Updating Java Security Standard Algorithm Names
  (P4) JDK-8289401: Add dump output to TestRawRSACipher.java
  (P4) JDK-8271838: AmazonCA.java interop test fails
  (P4) JDK-8287178: IntegerModuloP::multiplicativeInverse returns 0 for 0
  (P4) JDK-8286259: Password cleanup after KeyStore.PasswordProtection in P11KeyStore
  (P4) JDK-8220732: setSeed(long) java api doc is missing warning about provided seed quality
  (P5) JDK-8288329: Avoid redundant TreeMap.containsKey call in PolicyParser.read

security-libs/javax.crypto:
  (P4) JDK-8286779: javax.crypto.CryptoPolicyParser#isConsistent always returns 'true'

security-libs/javax.crypto:pkcs11:
  (P4) JDK-8288985: P11TlsKeyMaterialGenerator should work with ChaCha20-Poly1305

security-libs/javax.net.ssl:
  (P4) JDK-8288209: SSL debug message wrong about unsupported authentication scheme
  (P5) JDK-8267860: Off-by-one bug when searching arrays in AlpnGreaseTest

tools/jar:
  (P4) JDK-8287760: --do-not-resolve-by-default gets overwritten if --warn-if-resolved flags is used

tools/javac:
  (P4) JDK-8286035: Add source 20 and target 20 to javac
  (P4) JDK-8288130: compiler error with AP and explicit record accessor

tools/javadoc(tool):
  (P3) JDK-8286101: Support formatting in @value tag
  (P4) JDK-8288994: Incorrect @since tags for @value update in JDK-8286101

tools/jpackage:
  (P4) JDK-8288961: jpackage: test MSI installation fix
  (P4) JDK-8288013: jpackage: test utility Windows registry enhancement

tools/launcher:
  (P3) JDK-8233269: Improve handling of JAVA_ARGS