OracleJSP: oracle.jsp.provider.JspCompileException

Work with OC4J and seen this?

500 Internal Server Error

OracleJSP: oracle.jsp.provider.JspCompileException:
Errors compiling:\product\10.1.3.1\OracleAS_1\j2ee\home\application-deployments\TOLTAT\TOLTAT-webapp\persistence_pages
_index.java

Line # Error
18

cannot access HttpServletRequest bad class file: .\HttpServletRequest.class class file contains wrong class: javax.servlet.http.HttpServletRequest Please remove or make sure it appears in the correct subdirectory of the classpath. public void _jspService(HttpServletRequest request, HttpServletResponse response) throws java.io.IOException, ServletException {

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The fix is depressingly simple. Delete all the .class files from $ORACLE_HOME/j2ee/home/*.class. You don't need to bounce the server after this.