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Just a clarification, Nolio Release Automation 6.7 GA is now bundled with AdoptOpenJDK 8
Oracle Java 8 is no longer packaged with the solution. You can read more about same in release notes RA 6.7 Release Notes
With respect to jre version, all 6.7 components will be bundled with below JRE version
openjdk version "1.8.0_232"
OpenJDK Runtime Environment (AdoptOpenJDK)(build 1.8.0_232-b09)