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SSO Login Fails with Servlet Error: Error instantiating servlet 'auth' (Doc ID 1599357.1)

Last updated on NOVEMBER 19, 2019

Applies to:

Oracle Application Server Single Sign-On - Version to [Release 10gR2 to 10gR3]
Information in this document applies to any platform.


Attempting to login to any application protected with OSSO, getting the following error after clicking on LOGIN link:

Servlet error: Error instantiating servlet 'auth' (servlet class not found, make sure it exists at

in a jar in $ORACLE_HOME\j2ee\OC4J_SECURITY\applications\sso\web/WEB-INF/lib/,

in an orion-web.xml specified classpath or global server classpath) 


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