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FastSwap Application Fails with Error "java.lang.ClassFormatError: Invalid Signature attribute at constant pool index 269 in class file" (Doc ID 2766375.1)

Last updated on DECEMBER 16, 2023

Applies to:

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


When accessing FastSwap application, it returns error "java.lang.ClassFormatError: Invalid Signature attribute at constant pool index 269"

In this case JDeveloper is not used, application was built using maven and configured debugging turned off in the maven compiler plugin.
This is equivalent to not passing in java compiler option -g in jdeveloper.

Below is the error observed in the WebLogic server log:




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