OSSRH is reaching end of life on June 30, 2025, and users need to migrate their namespaces to the Central Portal as soon as possible.
Steps for self-migration include updating Maven plugins and GitHub actions for publishing Java artifacts to Maven Central.
To migrate, users must click 'Migrate Namespace' on the Namespaces page and update the pom.xml with the new central-publishing-maven-plugin configuration.
For GitHub actions, users need to generate a user token, store it as GitHub secrets, and update the GitHub actions configuration to ensure successful publishing to Maven Central.