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.

OpenJDK 21

OpenJDK 21.0.2

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

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

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 17.0.10

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

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

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

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

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

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

Known issues

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

OpenJDK 17.0.4

Known issues

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

OpenJDK 17.0.3

Known issues

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

OpenJDK 17.0.2

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

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

OpenJDK 11

OpenJDK 11.0.22

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

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

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

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

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

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

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

Known issues

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

OpenJDK 11.0.16

Known issues

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

OpenJDK 11.0.15

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

Microsoft-specific 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

Microsoft-specific 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

OpenJDK 11.0.12

Microsoft-specific enhancements

OpenJDK 11.0.11

List of security fixes and other fixes in OpenJDK 11.0.11

Microsoft-specific enhancements

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

Provide feedback on the Microsoft Build of OpenJDK

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Other releases

OpenJDK 16.0.2

Microsoft-specific enhancements