Hi Paul, This exception means that the jdk version of the execution code is lower than the compiled jdk version. 52 means that the JDK version that compiles it is 1.8. There is information that Flink 1.4 has removed support for Java 7, so your current best choice is to use JDK 1.8.[1]
[1]: http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Flink-1-4-0-can-not-override-JAVA-HOME-for-single-job-deployment-on-YARN-td17265.html Thanks, vino. Paul Lam <paullin3...@gmail.com> 于2018年8月30日周四 上午9:58写道： > Hi vino, > > Thanks for your suggestion. I believe it’s working. But I still get this > exception in jobmanager.err: > > > java.lang.UnsupportedClassVersionError: > org/apache/flink/yarn/entrypoint/YarnSessionClusterEntrypoint : Unsupported > major.minor version 52.0 > > I tried setting Java home for the jobmanager too, but it doesn’t help. > > Do you have any idea on this? Thanks a lot! > > Best, > Paul Lam > > > 在 2018年8月29日，16:08，vino yang <yanghua1...@gmail.com> 写道： > > Hi Paul, > > You can try: -yD yarn.taskmanager.env.JAVA_HOME=xx in the command line. > > Thanks, vino. > > Paul Lam <paullin3...@gmail.com> 于2018年8月29日周三 下午3:27写道： > >> Hi, >> >> I’m trying to run Flink on a YARN cluster that’s running on JDK 7, and I >> think it’s a quite common scenario, but it seems that currently there’s no >> way to pass the JAVA_HOME environment variable to YARN. >> >> Am I missing something? And should I create an issue requesting for that? >> >> Best, >> Paul Lam > > >
