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  1. ,
    via Google Groups by Marcus Haebler

    Update "latest" to Java 8 on DockerHub.

  2. ,
    via Stack Overflow by ERJAN

    This exception occurs when using an older version of java. Mainly when trying to run a jar compiled with a newer Java version in an older Java version. We can avoid this issue by executing the jar in the same version which it was compiled.

Solutions on the web

via Oracle Community by Srinivasan M, 1 year ago
oracle/dbtools/jarcl/Entrypoint : Unsupported major.minor version 51.0
via Oracle Community by Jeff Chirco, 1 year ago
oracle/dbtools/raptor/scriptrunner/cmdline/SqlCli : Unsupported major.minor version 51.0
via GitHub by collimarco
, 2 years ago
Pipe : Unsupported major.minor version 51.0
via GitHub by velvia
, 2 years ago
JettyLauncher : Unsupported major.minor version 51.0
via Stack Overflow by Annie
, 9 months ago
java.lang.UnsupportedClassVersionError: oracle/dbtools/jarcl/Entrypoint : Unsupported major.minor version 51.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(Unknown Source) at java.lang.ClassLoader.defineClass(Unknown Source) at java.security.SecureClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.access$000(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source)