Ran into something similar some time ago. When Java 21 came out, the system property "java.version" returned "21".
This broke some logic in Log4J1. But when the first point release comes out, it returned "21.0.1", and everything worked.
github.com/newrelic/new...
This broke some logic in Log4J1. But when the first point release comes out, it returned "21.0.1", and everything worked.
github.com/newrelic/new...
Reenable log4j1 tests for Java 21 · Issue #1547 · newrelic/newrelic-java-agent
Description MDC does not seem to work in Log4J1 when using Java 21. That feature does not work with Java 1, but the logic to check if it is running in Java 1 is flawed. https://github.com/apache/lo...
github.com
August 12, 2025 at 10:47 PM
Ran into something similar some time ago. When Java 21 came out, the system property "java.version" returned "21".
This broke some logic in Log4J1. But when the first point release comes out, it returned "21.0.1", and everything worked.
github.com/newrelic/new...
This broke some logic in Log4J1. But when the first point release comes out, it returned "21.0.1", and everything worked.
github.com/newrelic/new...
