1867911 - ClassCastException is thrown for an iview on enterprise portal

Portal runtime error occurs on enterprise portal, when an iview(standard or customized) is accessed on enterprise portal. For example, you see the below error in customized masthead iview:

Portal runtime error
An exception occured while processing your request. Send the exception ID to your portal administrator.
Exception ID <exception_ID>
See log file for details about this exception

The following exception is logged to the defaultTrace file:

java.lang.ClassCastException: class com.demo.test.portal.afp.navigation.MastHeadBean:WCE_PRIVATE_CL_demo.test/com.demo.test.portal.navigation.afp.masthead@com.sap.engine.boot.loader.
ResourceMultiParentClassLoader@2ct45tj5@alive incompatible with class com.demo.test.ep73core.portal.afp.navigation.MastHeadBean:WCE_PRIVATE_CL_demo.com/com.demo.test.portal.navigation.
afp.masthead@com.sap.engine.boot.loader.ResourceMultiParentClassLoader@5nc85sc3@alive
at PRT_jsp_WEB_2d_INF_jsp_Masthead_7711442_13221509711000_1266158076337._doContent(PRT_jsp_WEB_2d_INF_jsp_Masthead_7711442_13221509711000_1266158076337.java:87)

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Released Independent

SAP NetWeaver 2004 ; SAP NetWeaver 7.0 ; SAP NetWeaver 7.3 ; SAP NetWeaver 7.4 ; SAP NetWeaver Application Server for Java 7.1 ; SAP NetWeaver Application Server for Java 7.2 ; SAP NetWeaver Composition Environment 7.1 ; SAP NetWeaver Composition Environment 7.2 ; SAP enhancement package 1 for SAP NetWeaver 7.0 ; SAP enhancement package 1 for SAP NetWeaver 7.3 ; SAP enhancement package 1 for SAP NetWeaver Application Server for Java 7.1 ; SAP enhancement package 1 for SAP NetWeaver Composition Environment 7.1 ; SAP enhancement package 2 for SAP NetWeaver 7.0 ; SAP enhancement package 3 for SAP NetWeaver 7.0

exception, custom, developed, EJB, Bean , KBA , kde , BC-JAS-WEB , Web Container, HTTP, JavaMail, Servlets , EP-PIN-NAV , Navigation , Problem