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Problem
Attempting to open KVM after upgrading Appliance BIOSjava.lang.UnsupportedClassVersionError: com/ami/kvm/jviewer/JViewer : Unsupported major.minor version 51.0
Error Message
java.lang.UnsupportedClassVersionError: com/ami/kvm/jviewer/JViewer : Unsupported major.minor version 51.0
Cause
This error occurs when the Java Runtime Environment (JRE) is attempting to execute Java Code compiled using a higher version of Java.In this instance, the Java byte-code is version 51. The error is describing the installed JRE is unable to execute this version of compiled code.
See the below link for your reference:
https://en.wikipedia.org/wiki/Java_class_file#General_layout
major version number of the class file format being used.
Java SE 9 = 53 (0x35 hex),
Java SE 8 = 52 (0x34 hex),
Java SE 7 = 51 (0x33 hex),
Java SE 6.0 = 50 (0x32 hex),
Java SE 5.0 = 49 (0x31 hex),
Solution
Upgrade version of JRE on desktop where you are trying to open the KVM.The version of JRE installed needs to support the version of java class files described by the major version.
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Please note that this document is a translation from English, and may have been machine-translated. It is possible that updates have been made to the original version after this document was translated and published. Veritas does not guarantee the accuracy regarding the completeness of the translation. You may also refer to the English Version of this knowledge base article for up-to-date information.