servlet can not run

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1

hi, all,

After a few days’ struggling, the problems in my previous posts have been solved, now my JSP can run well, :slight_smile:

But servlet still can not run, the error message is:

exception

javax.servlet.ServletException: Invoker service() exception
at org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java:524)

root cause

java.lang.IncompatibleClassChangeError
at vaes.BuildSearchTry.doPost(BuildSearchTry.java:52)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

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Anybody meet this problem before? Any suggestion will be greatly appreciated!