Release notes for the Microsoft Build of OpenJDK

This article lists the fixes contained in the releases of Microsoft Build of OpenJDK packages and the Microsoft-specific enhancements pending to be merged upstream.

Known Issues

OpenJDK 17

• When running Alpine x64 (musl) builds on Alpine Linux 3.19.0 or later, SecureDirectoryStream is not supported.

OpenJDK 11

• When running Alpine x64 (musl) builds on Alpine Linux 3.19.0 or later, SecureDirectoryStream is not supported.

OpenJDK 21

OpenJDK 21.0.7

• releases/jdk-21.0.7
• List of fixes
• See the OpenJDK Vulnerability Advisory for vulnerabilities that were fixed in this release.

Enhancements / Additional Fixes

• Backport of JDK-8350609: Cleanup unknown unwind opcode (0xB) for windows
• Enabled GPU selection hinting in Windows builds using NvOptimusEnablement and AmdPowerXpressRequestHighPerformance
  • Exported driver hints to prefer high-performance GPU (NVIDIA/AMD) from the JVM
  • Useful in environments like Minecraft, IDEs, or ML tooling to ensure GPU utilization

OpenJDK 21.0.6

• releases/jdk-21.0.6
• List of fixes
• See the OpenJDK Vulnerability Advisory for vulnerabilities that were fixed in this release.

Enhancements / Additional Fixes

• Backport of JDK-8338136: Hotspot should support multiple large page sizes on Windows
• Backport of JDK-8345296: AArch64: VM crashes with SIGILL when prctl is disallowed
• Backport of JDK-8335977: Deoptimization fails with assert "object should be reallocated already"
• Backport of JDK-8340454: C2 EA asserts with "previous reducible Phi is no longer reducible before SUT"

OpenJDK 21.0.5

• releases/jdk-21.0.5
• List of fixes
• See the OpenJDK Vulnerability Advisory for vulnerabilities that were fixed in this release.

Enhancements

• Removed calls to undocumented Windows APIs (NtCreateKeyedEvent, NtReleaseKeyedEvent, NtWaitForKeyedEvent).
• Backport of JDK-8334475: UnsafeIntrinsicsTest.java#ZGenerationalDebug assert(!assert_on_failure) failed: Has low-order bits set.

OpenJDK 21.0.4

• releases/jdk-21.0.4
• List of fixes

Enhancements

• Enables Hotspot to use processors across all Windows processor groups on Windows 11/Windows Server 2022 and later.

OpenJDK 21.0.3

• releases/jdk-21.0.3
• List of fixes

Enhancements

• Includes a new feature (see JDK-8287061 and JDK-8289943) to improve the performance of Escape Analysis by increasing the number of opportunities for Scalar Replacement. This feature is enabled by default. To disable it, developers must use the following JVM flags:

  -XX:+UnlockDiagnosticVMOptions -XX:-ReduceAllocationMerges

• Includes a new JFR event to track Compiler Queue Utilization (a backport of JDK-8317562).

OpenJDK 21.0.2

• releases/jdk-21.0.2
• List of fixes

Enhancements

• Includes a new feature (see JDK-8287061 and JDK-8289943) to improve the performance of Escape Analysis by increasing the number of opportunities for Scalar Replacement. This feature is enabled by default. To disable it, developers must use the following JVM flags:

  -XX:+UnlockDiagnosticVMOptions -XX:-ReduceAllocationMerges

• Includes a new JFR event to track Compiler Queue Utilization (a backport of JDK-8317562).

OpenJDK 21.0.1

• releases/jdk-21.0.1
• List of fixes

Enhancements

• Includes a new feature (see JDK-8287061 and JDK-8289943) to improve the performance of Escape Analysis by increasing the number of opportunities for Scalar Replacement. This feature is enabled by default. To disable it, developers must use the following JVM flags:

  -XX:+UnlockDiagnosticVMOptions -XX:-ReduceAllocationMerges

Known issues

• AArch64 binaries do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.

OpenJDK 21.0.0

• releases/jdk-21.0.0
• List of fixes

Enhancements

• Includes a new feature (see JDK-8287061 and JDK-8289943) to improve the performance of Escape Analysis by increasing the number of opportunities for Scalar Replacement. This feature is enabled by default. To disable it, developers must use the following JVM flags:

  -XX:+UnlockDiagnosticVMOptions -XX:-ReduceAllocationMerges

Known issues

• AArch64 binaries do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.

OpenJDK 17

OpenJDK 17.0.15

• releases/jdk-17.0.15
• List of fixes
• See the OpenJDK Vulnerability Advisory for vulnerabilities that were fixed in this release.

Enhancements / Additional Fixes

• Backport of JDK-8350609: Cleanup unknown unwind opcode (0xB) for windows

OpenJDK 17.0.14

• releases/jdk-17.0.14
• List of fixes
• See the OpenJDK Vulnerability Advisory for vulnerabilities that were fixed in this release.

Enhancements / Additional Fixes

• Backport of JDK-8338136: Hotspot should support multiple large page sizes on Windows
• Backport of JDK-8345296: AArch64: VM crashes with SIGILL when prctl is disallowed
• Backport of JDK-8335977: Deoptimization fails with assert "object should be reallocated already"
• Backport of JDK-8340454: C2 EA asserts with "previous reducible Phi is no longer reducible before SUT"

OpenJDK 17.0.13

• releases/jdk-17.0.13
• List of fixes
• See the OpenJDK Vulnerability Advisory for vulnerabilities that were fixed in this release.

Enhancements

• Removed calls to undocumented Windows APIs (NtCreateKeyedEvent, NtReleaseKeyedEvent, NtWaitForKeyedEvent).

OpenJDK 17.0.12

• releases/jdk-17.0.12
• List of fixes

Enhancements

• Enables Hotspot to use processors across all Windows processor groups on Windows 11/Windows Server 2022 and later.
• Disable G1 preventive collections by default.

OpenJDK 17.0.11

• releases/jdk-17.0.11
• List of fixes

Enhancements

• Includes a new feature (see JDK-8287061 and JDK-8289943) to improve the performance of Escape Analysis by increasing the number of opportunities for Scalar Replacement. This feature is enabled by default. To disable it, developers must use the following JVM flags:

  -XX:+UnlockDiagnosticVMOptions -XX:-ReduceAllocationMerges

• Added support for SST files as KeyStores on Windows (see JDK-8306688), which can be enabled by using the following property:

  -Dsun.security.mscapi.enableSST=true

OpenJDK 17.0.10

• releases/jdk-17.0.10
• List of fixes

Enhancements

• Includes a new feature (see JDK-8287061 and JDK-8289943) to improve the performance of Escape Analysis by increasing the number of opportunities for Scalar Replacement. This feature is enabled by default. To disable it, developers must use the following JVM flags:

  -XX:+UnlockDiagnosticVMOptions -XX:-ReduceAllocationMerges

• Added support for SST files as KeyStores on Windows (see JDK-8306688), which can be enabled by using the following property:

  -Dsun.security.mscapi.enableSST=true

OpenJDK 17.0.9

• releases/jdk-17.0.9
• List of fixes

Enhancements

• Includes a new feature (see JDK-8287061 and JDK-8289943) to improve the performance of Escape Analysis by increasing the number of opportunities for Scalar Replacement. This feature is enabled by default. To disable it, developers must use the following JVM flags:

  -XX:+UnlockDiagnosticVMOptions -XX:-ReduceAllocationMerges

• Added support for SST files as KeyStores on Windows (see JDK-8306688), which can be enabled by using the following property:

  -Dsun.security.mscapi.enableSST=true

• Backport of JDK-8303607 SunMSCAPI provider leaks memory and keys

Known issues

• AArch64 binaries do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.

OpenJDK 17.0.8

• releases/jdk-17.0.8
• List of fixes

Enhancements

• Includes a new feature (see JDK-8287061 and JDK-8289943) to improve the performance of Escape Analysis by increasing the number of opportunities for Scalar Replacement. This feature is now enabled by default. To disable it, developers must use the following JVM flag:

  -XX:-ReduceAllocationMerges

Known issues

• AArch64 binaries do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.

OpenJDK 17.0.7

• releases/jdk-17.0.7
• List of fixes

Enhancements

• Includes an experimental feature to improve the performance of Escape Analysis by increasing the number of opportunities for Scalar Replacement. To enable this feature, developers must use the following JVM flags:

  -XX:+UnlockExperimentalVMOptions -XX:+ReduceAllocationMerges

Known issues

• AArch64 binaries do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.

OpenJDK 17.0.6

• releases/jdk-17.0.6
• List of fixes

Enhancements

• Includes an experimental feature to improve the performance of Escape Analysis by increasing the number of opportunities for Scalar Replacement. To enable this feature, developers must use the following JVM flags:

  -XX:+UnlockExperimentalVMOptions -XX:+ReduceAllocationMerges

Known issues

• Binaries do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.

OpenJDK 17.0.5

• releases/jdk-17.0.5
• List of fixes

Enhancements

• Added an experimental feature to improve the performance of Escape Analysis by increasing the number of opportunities for Scalar Replacement. To enable this feature, developers must use the following JVM flags:

  -XX:+UnlockExperimentalVMOptions -XX:+ReduceAllocationMerges

Known issues

• Binaries do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.

OpenJDK 17.0.4.1

• jdk-17.0.4.1-ga@02fa4be
• List of fixes

Known issues

• Binaries do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.

OpenJDK 17.0.4

• jdk-17.0.4-ga@c53d022
• List of fixes

Known issues

• Binaries do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.

OpenJDK 17.0.3

• jdk-17.0.3-ga@c1a8749
• List of fixes

Known issues

• Binaries do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.

OpenJDK 17.0.2

• jdk-17.0.2-ga@6f0f426
• List of fixes

Known issues

• Binaries do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.
• RPM package may not update automatically. Run yum install msopenjdk-17-17.0.2+8_LTS-1 to force update to latest release.

OpenJDK 17.0.1

• jdk-17.0.1-ga@75240a5
• List of fixes

Known issues

• Binaries for AArch64 do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.
• RPM package may not update automatically. Run yum install msopenjdk-17-17.0.1+12_LTS-1 to force update to latest release.

OpenJDK 17.0.0

• jdk-17-ga@dfacda48
• List of fixes

OpenJDK 11

OpenJDK 11.0.27

• release/jdk-11.0.27
• List of fixes
• See the OpenJDK Vulnerability Advisory for vulnerabilities that were fixed in this release.

Enhancements / Additional Fixes

• No additional enhancements/fixes.

OpenJDK 11.0.26

• release/jdk-11.0.26
• List of fixes
• See the OpenJDK Vulnerability Advisory for vulnerabilities that were fixed in this release.

Enhancements / Additional Fixes

• Backport of JDK-8335977: Deoptimization fails with assert "object should be reallocated already"
• Backport of JDK-8340454: C2 EA asserts with "previous reducible Phi is no longer reducible before SUT"

OpenJDK 11.0.25

• release/jdk-11.0.25
• List of fixes
• See the OpenJDK Vulnerability Advisory for vulnerabilities that were fixed in this release.

Enhancements

• Enables Hotspot to use processors across all Windows processor groups on Windows 11/Windows Server 2022 and later.

OpenJDK 11.0.24

• release/jdk-11.0.24
• List of fixes

Enhancements

• Enables Hotspot to use processors across all Windows processor groups on Windows 11/Windows Server 2022 and later.

OpenJDK 11.0.23

• release/jdk-11.0.23
• List of fixes

Enhancements

• Includes a new feature (see JDK-8287061 and JDK-8289943) to improve the performance of Escape Analysis by increasing the number of opportunities for Scalar Replacement. This feature is enabled by default. To disable it, developers must use the following JVM flags:

  -XX:+UnlockDiagnosticVMOptions -XX:-ReduceAllocationMerges

• Added support for SST files as KeyStores on Windows (see JDK-8306688), which can be enabled by using the following property:

  -Dsun.security.mscapi.enableSST=true

• Backports of the following enhancements and bug fixes:

  • JDK-8250902 Implement MD5 Intrinsics on x86 - Java Bug System
  • JDK Flight Recorder
    • JDK-8226897 Provide object age with JFR OldObjectSample event
    • JDK-8232594 Make the output of the JFR command duration more user friendly
    • JDK-8216041 Event Request Deoptimization
    • JDK-8216995 Clean up JFR Command Line
    • JDK-8217089 Lazy install os interface components for improved startup

Known issues

• Binaries for macOS/AArch64 do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.

OpenJDK 11.0.22

• release/jdk-11.0.22
• List of fixes

Enhancements

• Includes a new feature (see JDK-8287061 and JDK-8289943) to improve the performance of Escape Analysis by increasing the number of opportunities for Scalar Replacement. This feature is enabled by default. To disable it, developers must use the following JVM flags:

  -XX:+UnlockDiagnosticVMOptions -XX:-ReduceAllocationMerges

• Added support for SST files as KeyStores on Windows (see JDK-8306688), which can be enabled by using the following property:

  -Dsun.security.mscapi.enableSST=true

• Backports of the following enhancements and bug fixes:

  • JDK-8250902 Implement MD5 Intrinsics on x86 - Java Bug System
  • JDK Flight Recorder
    • JDK-8226897 Provide object age with JFR OldObjectSample event
    • JDK-8232594 Make the output of the JFR command duration more user friendly
    • JDK-8216041 Event Request Deoptimization
    • JDK-8216995 Clean up JFR Command Line
    • JDK-8217089 Lazy install os interface components for improved startup

Known issues

• Binaries for macOS/AArch64 do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.

OpenJDK 11.0.21

• release/jdk-11.0.21
• List of fixes

Enhancements

• Includes a new feature (see JDK-8287061 and JDK-8289943) to improve the performance of Escape Analysis by increasing the number of opportunities for Scalar Replacement. This feature is enabled by default. To disable it, developers must use the following JVM flags:

  -XX:+UnlockDiagnosticVMOptions -XX:-ReduceAllocationMerges

• Added support for SST files as KeyStores on Windows (see JDK-8306688), which can be enabled by using the following property:

  -Dsun.security.mscapi.enableSST=true

• Backports of the following enhancements and bug fixes:

  • JDK-8250902 Implement MD5 Intrinsics on x86 - Java Bug System
  • JDK Flight Recorder
    • JDK-8226897 Provide object age with JFR OldObjectSample event
    • JDK-8232594 Make the output of the JFR command duration more user friendly
    • JDK-8216041 Event Request Deoptimization
    • JDK-8216995 Clean up JFR Command Line
    • JDK-8217089 Lazy install os interface components for improved startup
  • JDK-8303607 SunMSCAPI provider leaks memory and keys

Known issues

• Binaries for AArch64 do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.

OpenJDK 11.0.20.1

• release/jdk-11.0.20.1
• List of fixes

Enhancements

• Includes a new feature (see JDK-8287061 and JDK-8289943) to improve the performance of Escape Analysis by increasing the number of opportunities for Scalar Replacement. This feature is enabled by default. To disable it, developers must use the following JVM flag:

  -XX:-ReduceAllocationMerges

• Backports of the following enhancements and bug fixes:

  • JDK-8250902 Implement MD5 Intrinsics on x86 - Java Bug System
  • JDK Flight Recorder
    • JDK-8226897 Provide object age with JFR OldObjectSample event
    • JDK-8232594 Make the output of the JFR command duration more user friendly
    • JDK-8216041 Event Request Deoptimization
    • JDK-8216995 Clean up JFR Command Line
    • JDK-8217089 Lazy install os interface components for improved startup

Known issues

• Binaries for AArch64 do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.

OpenJDK 11.0.20

• release/jdk-11.0.20
• List of fixes

Enhancements

• Includes a new feature (see JDK-8287061 and JDK-8289943) to improve the performance of Escape Analysis by increasing the number of opportunities for Scalar Replacement. This feature is now enabled by default. To disable it, developers must use the following JVM flag:

  -XX:-ReduceAllocationMerges

• Backports of the following enhancements and bug fixes:

  • JDK-8250902 Implement MD5 Intrinsics on x86 - Java Bug System
  • JDK Flight Recorder
    • JDK-8226897 Provide object age with JFR OldObjectSample event
    • JDK-8232594 Make the output of the JFR command duration more user friendly
    • JDK-8216041 Event Request Deoptimization
    • JDK-8216995 Clean up JFR Command Line
    • JDK-8217089 Lazy install os interface components for improved startup

Known issues

• Binaries for AArch64 do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.

OpenJDK 11.0.19

• release/jdk-11.0.19
• List of fixes

Enhancements

• Includes an experimental feature to improve the performance of Escape Analysis by increasing the number of opportunities for Scalar Replacement. To enable this feature, developers must use the following JVM flags:

  -XX:+UnlockExperimentalVMOptions -XX:+ReduceAllocationMerges

• Backports of the following enhancements and bug fixes:

  • JDK-8250902 Implement MD5 Intrinsics on x86 - Java Bug System
  • JFR
    • JDK-8226897 Provide object age with JFR OldObjectSample event - Java Bug System
    • JDK-8232594 Make the output of the JFR command duration more user friendly - Java Bug System
    • JDK-8216041 [Event Request] - Deoptimization - Java Bug System

Known issues

• Binaries for AArch64 do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.

OpenJDK 11.0.18

• release/jdk-11.0.18
• List of fixes

Enhancements

• Includes an experimental feature to improve the performance of Escape Analysis by increasing the number of opportunities for Scalar Replacement. To enable this feature, developers must use the following JVM flags:

  -XX:+UnlockExperimentalVMOptions -XX:+ReduceAllocationMerges

• Backports of the following enhancements and bug fixes:

  • JDK-8250902 Implement MD5 Intrinsics on x86 - Java Bug System
  • JFR
    • JDK-8226897 Provide object age with JFR OldObjectSample event - Java Bug System
    • JDK-8232594 Make the output of the JFR command duration more user friendly - Java Bug System
    • JDK-8216041 [Event Request] - Deoptimization - Java Bug System

Known issues

• Binaries do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.

OpenJDK 11.0.17

• release/jdk-11.0.17
• List of fixes

Enhancements

• Added an experimental feature to improve the performance of Escape Analysis by increasing the number of opportunities for Scalar Replacement. To enable this feature, developers must use the following JVM flags:

  -XX:+UnlockExperimentalVMOptions -XX:+ReduceAllocationMerges

Known issues

• Binaries do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.

OpenJDK 11.0.16.1

• jdk-11.0.16.1-ga@63e4b5c
• List of fixes

Known issues

• Binaries do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.

OpenJDK 11.0.16

• jdk-11.0.16-ga@224e1a3
• List of fixes

Known issues

• Binaries do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.

OpenJDK 11.0.15

• jdk-11.0.15-ga@224e1a3
• List of fixes

Known issues

• Binaries do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.

OpenJDK 11.0.14.1

• jdk-11.0.14.1-ga@b8cdf1a
• List of fixes

Enhancements

• Backport of JEP 391 macOS/AArch64 Port
• Backport of JEP 386 Alpine Linux Port

Known issues

• Binaries do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.

OpenJDK 11.0.14

• jdk-11.0.14-ga@1453335
• List of fixes

Enhancements

• Backport of JEP 391 macOS/AArch64 Port
• Backport of JEP 386 Alpine Linux Port

Known issues

• Binaries do not have Default CDS (JEP 341) archives. Run java -Xshare:dump to produce them after installation.

OpenJDK 11.0.13

• jdk-11.0.13-ga@71f2c751
• List of fixes

OpenJDK 11.0.12

• jdk-11.0.12-ga@d1541f3
• List of fixes

Enhancements

• JDK-8250902 Implement MD5 Intrinsics on x86 - Java Bug System
• Backports of the following enhancements and bug fixes:
  • https://openjdk.java.net/jeps/388
  • https://github.com/openjdk/jdk/pull/212
  • Backport of AArch64: initialize memory allocated for locals according to Windows AArch64 stack page growth requirement in template interpreter: JDK-8269391
  • Backport of AArch64: Fix MacroAssembler::get_thread convention: JDK-8271002
  • Backport of C4530 was reported from VS 2019 at access bridge: JDK-8271095
  • Backport of JVMCI: Enable it for Windows+AArch64: JDK-8264184

OpenJDK 11.0.11

List of security fixes and other fixes in OpenJDK 11.0.11

Enhancements

• JDK-8250902 Implement MD5 Intrinsics on x86 - Java Bug System

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Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.

Other releases

OpenJDK 16.0.2

• jdk-16.0.2-ga@3b56f0b
• List of fixes

Enhancements

• JDK-8269392: Backport of AArch64: initialize memory allocated for locals according to Windows AArch64 stack page growth requirement in template interpreter
• Backports of JEP 391: macOS/AArch64 Port, PR: 8253795: Implementation of JEP 391: macOS/AArch64 Port with these additional bug fixes:
  • JDK-8271576: Backport of Arch64: Fix MacroAssembler::get_thread convention
  • JDK-8271577: Backport of [macos_aarch64] Crash in jni_fast_GetLongField
  • JNF removal and dependency fixups: Backports of Bad JNI lookup getFocusOwner in accessibility code on Mac OS X, [macOS] Bad JNI lookup error : Accessible actions do not work on macOS, Remove JNF dependency from libsaproc/MacosxDebuggerLocal.m and [macOS] Incorrect JNI parameters in number conversion in A11Y code
  • SIGBUS fix and a few others: Backports of [macos_aarch64] SIGBUS in Assembler::ld_st2, Missed JNFInstanceOf -> IsInstanceOf conversion, AArch64: Refactor interpreter native wrappers, Use MAP_JIT when allocating pages for code cache on macOS, Create stubRoutines.inline.hpp with SafeFetch implementation