RELEASE NOTES FOR: 17.0.21 ==================================================================================================== Notes generated: Fri Aug 14 05:25:16 CEST 2026 Hint: Prefix bug IDs with https://bugs.openjdk.org/browse/ to reach the relevant JIRA entry. JAVA ENHANCEMENT PROPOSALS (JEP): None. RELEASE NOTES: hotspot/compiler: JDK-8348561: ML-DSA Performance Improved The performance of the ML-DSA key generation, sign, and verify operations has been improved significantly, 1.5 - 2.5 times depending on operation type and input, on the aarch64 and AVX-512 platforms. JDK-8349721: ML-KEM Performance Improved The performance of the ML-KEM key generation, encapsulation, and decapsulation operations has been improved significantly, 1.9 - 2.7 times depending on operation type and platform, on the aarch64 and AVX-512 platforms. security-libs/java.security: JDK-8333867: SHA3 Performance Improved The performance of the `MessageDigest` implementations that belong to the SHA3 family (SHA3-224, SHA3-256, SHA3-384, and SHA3-512) has been improved by 6-27%, depending on digested message length and on the platform used. An additional 30-40% can be experienced on AVX-512 capable platforms due to new intrinsic implementations on that platform. ALL FIXED ISSUES, BY COMPONENT AND PRIORITY: client-libs/2d: (P4) JDK-8365426: [macos26] Graphics2D tests fail on new macOS 26 (P4) JDK-8300167: Add validation of the raster's layout before using in native (P4) JDK-8284965: closed test sun/java2d/OpenGL/XORPaint.java is unstable (P4) JDK-8298240: Replace the usage of ImageLayoutException by the CMMException client-libs/java.awt: (P3) JDK-8164464: Consistent failure of java/awt/dnd/MissingEventsOnModalDialog/MissingEventsOnModalDialogTest.java (P3) JDK-8386991: Insets are incorrectly set in newer Gnome versions (P3) JDK-8023814: Test java/awt/im/memoryleak/InputContextMemoryLeakTest.java fails (P4) JDK-6626492: Event time in future part 2, now on X (P4) JDK-8129778: Few awt test fail for Solaris 11 with RuntimeException (P4) JDK-8168388: GetMousePositionTest fails with the message "Mouse position should not be null" (P4) JDK-8202932: java/awt/Component/NativeInLightShow/NativeInLightShow.java fails (P4) JDK-8196367: java/awt/List/SingleModeDeselect/SingleModeDeselect.java times out (P4) JDK-8196018: java/awt/Scrollbar/ScrollbarMouseWheelTest/ScrollbarMouseWheelTest.java fails (P4) JDK-8213120: java/awt/TextArea/AutoScrollOnSelectAndAppend/AutoScrollOnSelectAndAppend.java fails on mac10.13 (P4) JDK-8355241: Move NativeDialogToFrontBackTest.java PL test to manual category (P4) JDK-8196440: Regression automated Test 'java/awt/TrayIcon/PopupMenuLeakTest/PopupMenuLeakTest.java' fails (P4) JDK-8343739: Test java/awt/event/KeyEvent/ExtendedKeyCode/ExtendedKeyCodeTest.java failed: Wrong extended key code (P4) JDK-8352149: Test java/awt/Frame/MultiScreenTest.java fails: Window list is empty (P4) JDK-8213530: Test java/awt/Modal/ToFront/DialogToFrontModeless1Test.java fails on Linux (P4) JDK-8148041: Test java/awt/Mouse/TitleBarDoubleClick/TitleBarDoubleClick fails on Ubuntu with mouseReleased event after double click on title bar (P4) JDK-8372546: UnixMultiResolutionSplashTest.java fails intermittently on Ubuntu_24.04 client-libs/javax.accessibility: (P3) JDK-8372757: MacOS, Accessibility: Crash in [MenuAccessibility accessibilityChildren] after JDK-8341311 client-libs/javax.sound: (P4) JDK-8373632: Some sound tests failing in CI due to lack of sound key client-libs/javax.swing: (P3) JDK-8194946: Regression automated Test 'javax/swing/JFileChooser/6738668/bug6738668.java' fails (P4) JDK-8305780: javax/swing/JTable/7068740/bug7068740.java fails on Ubunutu 20.04 (P4) JDK-8376151: Test javax/swing/JFileChooser/4966171/bug4966171.java is failing with OOME core-libs: (P3) JDK-8378180: Compiling OpenJDK with C23 C-Compiler gives warning: initialization discards ‘const’ qualifier from pointer target type core-libs/java.io: (P4) JDK-8343342: java/io/File/GetXSpace.java fails on Windows with CD-ROM drive core-libs/java.lang: (P3) JDK-8356695: java/lang/StringBuilder/HugeCapacity.java failing with OOME (P4) JDK-8279954: java/lang/StringBuffer(StringBuilder)/HugeCapacity.java intermittently fails core-libs/java.lang.invoke: (P4) JDK-8373832: Test java/lang/invoke/TestVHInvokerCaching.java tests nothing core-libs/java.net: (P3) JDK-8304701: Request with timeout aborts later in-flight request on HTTP/1.1 cxn (P4) JDK-8373796: Refactor java/net/httpclient/ThrowingPublishers*.java tests to use JUnit5 (P4) JDK-8373866: Refactor java/net/httpclient/ThrowingSubscribers*.java tests to use JUnit5 (P4) JDK-8318662: Refactor some jdk/java/net/httpclient/http2 tests to JUnit (P4) JDK-8365983: Tests should throw SkippedException when SCTP not supported core-libs/java.nio: (P4) JDK-8378878: Refactor java/nio/channels/AsynchronousSocketChannel test to use JUnit core-libs/java.rmi: (P4) JDK-8365398: TEST_BUG: java/rmi/transport/checkLeaseInfoLeak/CheckLeaseLeak.java failing intermittently core-libs/java.util.concurrent: (P4) JDK-8296405: java/util/concurrent/forkjoin/AsyncShutdownNow.java is too slow core-libs/java.util.jar: (P4) JDK-8304013: Add a fast, non-manual alternative to test/jdk/java/util/zip/ZipFile/TestTooManyEntries (P4) JDK-8341625: Improve ZipFile validation of the END header core-libs/java.util:i18n: (P4) JDK-8380993: [REDO] Incorrect Interpretation of POSIX TZ Environment Variable on AIX core-svc/java.lang.management: (P4) JDK-8303136: MemoryPoolMBean/isCollectionUsageThresholdExceeded/isexceeded005 failed with "isCollectionUsageThresholdExceeded() returned true, while threshold = 1 and used = 0" (P4) JDK-8345684: OperatingSystemMXBean.getSystemCpuLoad() throws NPE core-svc/tools: (P4) JDK-8278102: containers/docker/TestJcmd.java failed with "RuntimeException: Could not find specified process" hotspot/compiler: (P3) JDK-8295698: AArch64: test/jdk/sun/security/ec/ed/EdDSATest.java failed with -XX:+UseSHA3Intrinsics (P3) JDK-8348561: Add aarch64 intrinsics for ML-DSA (P3) JDK-8349721: Add aarch64 intrinsics for ML-KEM (P4) JDK-8310331: JitTester: Exclude java.lang.Math.random (P4) JDK-8275047: Optimize existing fill stubs for AVX-512 target (P4) JDK-8284813: x86 Code cleanup related to move instructions. hotspot/gc: (P4) JDK-8377347: jdk/jfr/event/gc/detailed/TestZAllocationStallEvent.java intermittent OOME (P4) JDK-8286737: Test vmTestbase/gc/gctests/WeakReference/weak006/weak006.java fails: Last soft reference has not been cleared hotspot/jfr: (P3) JDK-8380011: Path-to-gcroots search should not trigger stack overflows (P4) JDK-8365498: jdk/jfr/event/os/TestCPULoad.java fails with Expected at least one event hotspot/runtime: (P3) JDK-8377991: TestLimitsUpdating.java fails with runtime exception even after JDK-8370492 is fixed (P4) JDK-8375125: assert(false) failed: "Attempting to acquire lock NativeHeapTrimmer_lock/nosafepoint out of order with lock ConcurrentHashTableResize_lock/nosafepoint-2 -- possible deadlock" when using native heap trimmer (P4) JDK-8334502: gtest/GTestWrapper.java fails on armhf due to LogDecorations.iso8601_utctime_test hotspot/svc: (P4) JDK-8387625: Add "dt_socket" to `CheckedFeatures.notImplemented` for Windows/ARM64 infrastructure: (P4) JDK-8385509: Bump update version for OpenJDK: jdk-17.0.21 infrastructure/build: (P3) JDK-8300805: Update autoconf build-aux files with latest from 2022-09-17 security-libs/java.security: (P2) JDK-8345057: ML_KEM NamedParameterSpec constants removed by ML-DSA integration (P2) JDK-8342002: sun/security/tools/keytool/GenKeyPairSigner.java failed due to missing certificate output (P3) JDK-8340327: A common framework to support public key algorithms with standard parameter sets (P3) JDK-8374886: CAInterop.java#microsoftrsa2017 test fails as EE certificate does not specify OCSP responder (P3) JDK-8308474: DSA does not reset SecureRandom when initSign is called again (P3) JDK-8300399: EdDSA does not verify when there is no message (P3) JDK-8298387: Implement JEP 497: Quantum-Resistant Module-Lattice-Based Digital Signature Algorithm (P3) JDK-8338587: Internal XOF Methods for SHAKE128 and SHAKE256 (P3) JDK-8279800: isAssignableFrom checks in AlgorithmParametersSpi.engineGetParameterSpec appear to be backwards (P3) JDK-8320192: SHAKE256 does not work correctly if n >= 137 (P3) JDK-8345533: Switch ML-DSA implementation to FIPS 204 final (P3) JDK-8349017: Update ML tests to verify against ACVP 1.1.0.38 version (P4) JDK-8381771: Add a check for DNS label not to end with a hyphen (P4) JDK-8385584: CAInterop.java#buypassclass3ca fails with Intermediate Root CA not found in the chain (P4) JDK-8267617: Certificate's IP x509 NameConstraints raises ArrayIndexOutOfBoundsException (P4) JDK-8325506: Ensure randomness is only read from provided SecureRandom object (P4) JDK-8381937: Make exceptions in Java_sun_security_mscapi_CKeyPairGenerator generateCKeyPair more specific (P4) JDK-8345512: Remove wrapper functions for intrinsics in PQC algorithms (P4) JDK-8333867: SHA3 performance can be improved (P4) JDK-8275914: SHA3: changing java implementation to help C2 create high-performance code (P4) JDK-8342442: Static ACVP sample tests security-libs/javax.crypto: (P3) JDK-8298390: Implement JEP 496: Quantum-Resistant Module-Lattice-Based Key Encapsulation Mechanism (P4) JDK-8296910: Add EdDSA/XDH/RSASSA-PSS to KeyPairGeneratorBench.java (P4) JDK-8350589: Investigate cleaner implementation of AArch64 ML-DSA intrinsic introduced in JDK-8348561 security-libs/javax.net.ssl: (P4) JDK-8348309: MultiNST tests need more debugging and timing (P4) JDK-8366182: Some PKCS11Tests are being skipped when they shouldn't (P4) JDK-8333857: Test sun/security/ssl/SSLSessionImpl/ResumeChecksServer.java failed: Existing session was used security-libs/jdk.security: (P4) JDK-8365863: /test/jdk/sun/security/pkcs11/Cipher tests skip without SkippedException (P4) JDK-8282633: jarsigner output does not explain why an EC key is disabled if its curve has been disabled (P4) JDK-8367096: jdk/open/test/jdk/sun/security/pkcs11/ rsa, ec, config, secmod and sslecc tests are skipping but showing as pass (P4) JDK-8361894: sun/security/krb5/config/native/TestDynamicStore.java ensure that the test is run with sudo (P4) JDK-8360562: sun/security/tools/keytool/i18n.java add an ability to add comment for failures (P4) JDK-8365861: test/jdk/sun/security/pkcs11/Provider/ tests skipped without SkippedException (P4) JDK-8373793: TestDynamicStore.java '/manual' disables use of '/timeout' (P5) JDK-8360395: sun/security/tools/keytool/i18n.java user country is current user location instead of the language tools: (P4) JDK-8313612: Use JUnit in lib-test/jdk tests tools/jshell: (P4) JDK-8386776: [17u] Test test/langtools/jdk/jshell/UndefinedClassTest.java fails on JDK 17 with java.lang.ThreadDeath (P4) JDK-8305714: Add an extra test for JDK-8292755 xml/jaxp: (P4) JDK-8349959: Test CR6740048.java passes unexpectedly missing CR6740048.xsd