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Application Fails with Error "java.lang.ClassFormatError: Class file version does not support constant tag 18 in class file" when "fast-swap" is Enabled (Doc ID 2735770.1)

Last updated on DECEMBER 16, 2020

Applies to:

Oracle WebLogic Server - Version 14.1.1.0.0 and later
Information in this document applies to any platform.

Symptoms

With fast-swap enabled, application fails with error ClassFormatError. Refer to below for the complete error stack.
The error does not occur when fast-swap is disabled.

Server log:

 

Changes

 fast-swap is enabled in the application.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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