tests fail on Java 21 (works on Java 17) #2095

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1. vinirib commented on Oct 29, 2026

   

   vinirib

   on Oct 29, 2026

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   Still reproducible on current master (2.1.49-SNAPSHOT), and JDK 25 adds a second failure. Results of mvn -B install:

   • JDK 21 and 25: 15 tests in PermittedUrlsCheckerTest (swagger-parser-safe-url-resolver) fail with class redefinition failed: attempted to change the class NestHost, NestMembers.... @Mocked NetUtils makes JMockit 1.49 cascade-mock the InetAddress return type, and redefining that JDK class is rejected on 21+. It is the only test class affected: the other modules, including the JMockit tests in swagger-parser-v3, pass on both JDKs.
   • JDK 25 only: maven-javadoc-plugin fails swagger-parser-core with Unexpected redirection for URL http://docs.oracle.com/javase/8/docs/api/element-list. Oracle now redirects that URL, and javadoc 25 treats the redirect as an error.

   I'd like to work on this. The plan: migrate PermittedUrlsCheckerTest to Mockito 4.11 mockStatic (still Java 8 compatible), drop the hardcoded javadoc link so the plugin uses its bundled Java 8 package list, and add 21 and 25 to the PR build matrix. The compiler target stays at Java 8.