Release notes for Red Hat build of OpenJDK 8.0.452

Red Hat will support select major versions of Red Hat build of OpenJDK in its products. For consistency, these are the same versions that Oracle designates as long-term support (LTS) for the Oracle JDK.

A major version of Red Hat build of OpenJDK will be supported for a minimum of six years from the time that version is first introduced. For more information, see the OpenJDK Life Cycle and Support Policy.

Red Hat build of OpenJDK in Red Hat Enterprise Linux (RHEL) contains a number of structural changes from the upstream distribution of OpenJDK. The Microsoft Windows version of Red Hat build of OpenJDK attempts to follow RHEL updates as closely as possible.

The following list details the most notable Red Hat build of OpenJDK 8 changes:

The latest Red Hat build of OpenJDK 8 release might include new features. Additionally, the latest release might enhance, deprecate, or remove features that originated from earlier Red Hat build of OpenJDK 8 releases.

Red Hat build of OpenJDK new features and enhancements

Review the following release notes to understand new features and feature enhancements that Red Hat build of OpenJDK 8.0.452 provides:

Warnings from jarsigner tool about removed file entries

In earlier Red Hat build of OpenJDK releases, when a file was removed from a signed JAR file but the file signature was still present, the jarsigner tool did not detect this situation.

In Red Hat build of OpenJDK 8.0.452, you can use the jarsigner ‑verify command to check that every signature has a matching file entry. If any mismatch exists, this command prints a warning. To display the names of any mismatched entries, add the ‑verbose option to the command.

See JDK-8309841 (JDK Bug System).

Distrust of TLS server certificates issued after 15 April 2025 and anchored by Camerfirma root CAs

In accordance with similar plans that Google, Mozilla, Apple, and Microsoft recently announced, Red Hat build of OpenJDK 8.0.452 distrusts TLS certificates that are issued after 15 April 2025 and anchored by Camerfirma root certificates.

Red Hat build of OpenJDK will continue to trust certificates that are issued on or before 15 April 2025 until these certificates expire.

If a server’s certificate chain is anchored by an affected certificate, any attempts to negotiate a TLS session now fail with an exception to indicate that the trust anchor is not trusted. For example:

TLS server certificate issued after 2025-04-15 and anchored by a distrusted legacy Camerfirma root CA: CN=Chambers of Commerce Root -
2008, O=AC Camerfirma S.A., SERIALNUMBER=A82743287, L=Madrid (see current address at www.camerfirma.com/address), C=EU

You can check whether this change affects a certificate in a JDK keystore by using the following keytool command:

keytool -v -list -alias <your_server_alias> -keystore <your_keystore_filename>

If this change affects any certificate in the chain, update this certificate or contact the organisation that is responsible for managing the certificate.

If you want to continue using TLS server certificates that are anchored by Camerfirma root certificates, you can remove CAMERFIRMA_TLS from the jdk.security.caDistrustPolicies security property either by modifying the java.security configuration file or by using the java.security.properties system property.

These restrictions apply to the following Camerfirma root certificates that Red Hat build of OpenJDK includes:

See JDK-8346587 (JDK Bug System).

IANA time zone database updated to version 2024b

In Red Hat build of OpenJDK 8.0.452, the in-tree copy of the Internet Assigned Numbers Authority (IANA) time zone database is updated to version 2024b. This update is primarily concerned with improving historical data for Mexico, Monogolia, and Portugal.

This update to the IANA database also includes the following changes:

See JDK-8339637 (JDK Bug System).