"Missing class" error when accessing Discoverer from EBS

(Doc ID 2321492.1)

Last updated on OCTOBER 26, 2017

Applies to:

Oracle E-Business Suite Technology Stack - Version 12.1.3 to 12.1.3 [Release 12.1]
Information in this document applies to any platform.

Symptoms

On : 11.1.1.7.0 version, Discoverer

when launching Discoverer Plus or Viewer through EBS 12.1.3, the below error occurs

ERROR
-----------------------
An exception occured.

URL=https://ebsdev.oracle.com/OA_HTML/OracleOasis.jsp?transactionid=712789351&language_code=US&&OAFMID=78818&OAPB=_OAFMID&mode=DISCO&viewer=N&oas=qjJdsEU6Q7IeAYeiSgnHAw..

javax.servlet.ServletException: oracle.classloader.util.AnnotatedClassNotFoundException:

Missing class: _OracleOasis

Dependent class: oracle.jsp.runtimev2.JspPageInfo
Loader: oc4j:10.1.3
Code-Source: /u01/ora/ebsdev/apps/tech_st/10.1.3/j2ee/home/lib/ojsp.jar
Configuration: in META-INF/boot.xml in /u01/ora/ebsdev/apps/tech_st/10.1.3/j2ee/home/oc4j.jar

This load was initiated at oacore.web.html.jsp21685037:0.0.0 using the loadClass() method.

The missing class is not available from any code-source or loader in the system.


Cause

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