Release notes for Eclipse Temurin 17.0.9
Abstract
Preface
Open Java Development Kit (OpenJDK) is a free and open-source implementation of the Java Platform, Standard Edition (Java SE). Eclipse Temurin is available in three LTS versions: OpenJDK 8u, OpenJDK 11u, and OpenJDK 17u.
Binary files for Eclipse Temurin are available for macOS, Microsoft Windows, and multiple Linux x86 Operating Systems including Red Hat Enterprise Linux and Ubuntu.
Providing feedback on Red Hat build of OpenJDK documentation
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Making open source more inclusive
Red Hat is committed to replacing problematic language in our code, documentation, and web properties. We are beginning with these four terms: master, slave, blacklist, and whitelist. Because of the enormity of this endeavor, these changes will be implemented gradually over several upcoming releases. For more details, see our CTO Chris Wright’s message.
Chapter 1. Support policy for Eclipse Temurin
Red Hat will support select major versions of Eclipse Temurin in its products. For consistency, these versions remain similar to Oracle JDK versions that Oracle designates as long-term support (LTS).
A major version of Eclipse Temurin will be supported for a minimum of six years from the time that version is first introduced. For more information, see the Eclipse Temurin Life Cycle and Support Policy.
RHEL 6 reached the end of life in November 2020. Because of this, Eclipse Temurin does not support RHEL 6 as a supported configuration.
Chapter 2. Eclipse Temurin features
Eclipse Temurin does not contain structural changes from the upstream distribution of OpenJDK.
For the list of changes and security fixes that the latest OpenJDK 17 release of Eclipse Temurin includes, see OpenJDK 17.0.9 Released.
2.1. New features and enhancements
Review the following release notes to understand new features and feature enhancements included with the Eclipse Temurin 17.0.9 release:
Increased default group size of TLS Diffie-Hellman
In OpenJDK 17.0.9, the JDK implementation of TLS 1.2 uses a default Diffie-Hellman key size of 2048 bits. This supersedes the behavior in previous releases where the default Diffie-Hellman key size was 1024 bits.
This enhancement is relevant when a TLS_DHE
cipher suite is negotiated and either the client or the server does not support Finite Field Diffie-Hellman Ephemeral (FFDHE) parameters. The JDK TLS implementation supports FFDHE, which is enabled by default and can negotiate a stronger key size.
As a workaround, you can revert to the previous key size by setting the jdk.tls.ephemeralDHKeySize
system property to 1024
. However, to mitigate risk, consider using the default key size of 2048 bits.
This change does not affect TLS 1.3, which already uses a minimum Diffie-Hellman key size of 2048 bits.
See JDK-8301700 (JDK Bug System).
Output of -XshowSettings:locale
option includes tzdata
version
In OpenJDK 17.0.9, the -XshowSettings
launcher option also prints the tzdata
version that the JDK uses. The tzdata
version is displayed as part of the output for the -XshowSettings:locale
option.
For example:
Locale settings: default locale = English default display locale = English default format locale = English tzdata version = 2023c
See JDK-8305950 (JDK Bug System).
Certigna root CA certificate added
In OpenJDK 17.0.9, the cacerts
truststore includes the following Certigna root certificate:
- Name: Certigna (Dhimyotis)
- Alias name: certignarootca
- Distinguished name: CN=Certigna Root CA, OU=0002 48146308100036, O=Dhimyotis, C=FR
2.2. Deprecated features
Review the following release notes to understand pre-existing features that have been either deprecated or removed in Eclipse Temurin 17.0.9:
SECOM Trust Systems root CA1 certificate removed
OpenJDK 17.0.9 removes the following root certificate from the cacerts
truststore:
- Alias name: secomscrootca1 [jdk]
- Distinguished name: OU=Security Communication RootCA1, O=SECOM Trust.net, C=JP
See JDK-8295894 (JDK Bug System).
Revised on 2024-05-03 15:37:37 UTC