The FlightRecordingSupportRule does not work with JFR files from Zulu JVM. The regex parsing the Java internal version (RulesToolkit.getJavaVersion()) can't parse the one from Zulu JVM.

NB: the Java internal version can be obtain with java -Xinternalversion.

Here are a list of some Java internal version each major version of Java for the Zulu JVM:

• Java 12: OpenJDK 64-Bit Server VM (12.0.2+3) for linux-amd64 JRE (Zulu12.3+11-CA) (12.0.2+3), built on Jul 11 2019 18:01:29 by "zulu_re" with gcc 7.3.1 20180303 (Red Hat 7.3.1-5)
• Java 11: OpenJDK 64-Bit Server VM (11.0.4+11-LTS) for linux-amd64 JRE (Zulu11.33+15-CA) (11.0.4+11-LTS), built on Jul 11 2019 21:37:17 by "zulu_re" with gcc 4.9.2 20150212 (Red Hat 4.9.2-6)
• Java 10: OpenJDK 64-Bit Server VM (10.0.2+13) for linux-amd64 JRE (10.0.2+13), built on Jul 23 2018 23:40:21 by "tester" with gcc 4.9.2 20150212 (Red Hat 4.9.2-6)
• Java 8: OpenJDK 64-Bit Server VM (25.222-b10) for linux-amd64 JRE (Zulu 8.40.0.25-CA-linux64) (1.8.0_222-b10), built on Jul 11 2019 11:36:39 by "zulu_re" with gcc 4.4.7 20120313 (Red Hat 4.4.7-3)
• Java 7: OpenJDK 64-Bit Server VM (24.232-b6) for linux-amd64 JRE (Zulu 7.31.0.5-CA-linux64) (1.7.0_232-b6), built on Jul 10 2019 14:03:06 by "zulu_re" with gcc 4.4.7 20120313 (Red Hat 4.4.7-3)