FULL PRODUCT VERSION :
java -1.8.0_25

ADDITIONAL OS VERSION INFORMATION :
it is no relevant for the issue

EXTRA RELEVANT SYSTEM CONFIGURATION :
it is no relevant for the issue

A DESCRIPTION OF THE PROBLEM :
I have an applet running in a web, it were working until one day a client report an issue, we try to investigate the issue and it ran well in older versions of jre but don't work in jre 8 25 our temporal solution is to make our clients download an older version of jre but it would be better if it works again in future versions, the stack trace said "class not found exception in classloader" but just to be clear it doesn't ocurre in older versions, it works fine in older versions.

REGRESSION. Last worked in version 8u20

ADDITIONAL REGRESSION INFORMATION:
java -1.8.0_20


REPRODUCIBILITY :
This bug can be reproduced always.