Unsupported major.minor version 52.0 error post upgrade

Unsupported major.minor version 52.0 error post upgrade

Issue:

After 11.0 (from 8.1 to 11..0) successful upgrade, application does not start due to renaming of JRE folder not happening automatically.

Exception in thread "main" java.lang.
UnsupportedClassVersionError
: com/adventnet/servicedesk/server/utils/SDResourceCheck : Unsupported major.minor version 52.0
        at java.lang.ClassLoader.defineClass1(Native Method)

Fix:

Manually rename the JRE to JRE_OLD and JRE_NEW to JRE.

Start the application now and check, it should work.

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