asked on

What r the causes of java.lang.NoSuchMethodError?

I'm getting the following error message for last two hours and what drives me nuts is that it was working fine just a few minutes before that.
The method is in the java file and the class file is int the right directory.
Any advice plz?

HTTP Status 500 -

--------------------------------------------------------------------------------

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: com.near.region.RegionalManager.DblCheck(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)I
      at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:498)
      at org.apache.jsp.overview_proc_jsp._jspService(overview_proc_jsp.java:116)
      at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:92)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
      at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:162)
      at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:240)
      at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:187)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:200)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:146)
      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:209)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:144)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
      at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2358)
      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:133)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
      at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:118)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
      at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:116)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
      at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:127)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
      at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:152)
      at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:300)
      at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:374)
      at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:743)
      at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:675)
      at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:866)
      at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
      at java.lang.Thread.run(Thread.java:536)

root cause

java.lang.NoSuchMethodError: com.near.region.RegionalManager.DblCheck(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)I
      at org.apache.jsp.overview_proc_jsp._jspService(overview_proc_jsp.java:98)
      at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:92)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
      at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:162)
      at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:240)
      at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:187)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:200)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:146)
      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:209)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:144)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
      at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2358)
      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:133)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
      at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:118)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
      at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:116)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
      at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:127)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
      at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:152)
      at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:300)
      at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:374)
      at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:743)
      at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:675)
      at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:866)
      at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
      at java.lang.Thread.run(Thread.java:536)

--------------------------------------------------------------------------------

Apache Tomcat/4.1.31

nagunpyo

ASKER

i've deleted the old class and recompiled the java code, but still no luck.

koppcha

Do you have DblCheck method in RegionalManager?

after changing the class files you recompile and redploy as well.

Post your JSP

koppcha

Did you change the version of the compiler ?

nagunpyo

ASKER

Yes, I do have the method in RegionalManager, I did recompile and restart Tomcat.

Here's my JSP file

<%@ page language="java" import="java.io.*" contentType="text/html;charset=UTF-8" %>

<jsp:useBean id="cc" scope="page" class="com.near.region.OverviewCode" />
<jsp:useBean id="cm" scope="page" class="com.near.region.RegionalManager" />
<jsp:useBean id="uf" scope="page" class="com.near.code.UtilFunc" />
<%
try{

      String tName = uf.toKor(request.getParameter("tName"));            //---- Table name
      String country = uf.toKor(request.getParameter("country"));
      String gov = uf.toKor(request.getParameter("government"));
      String typemain = uf.toKor(request.getParameter("typeMain"));
      String typesub = uf.toKor(request.getParameter("typeSub"));
      String lang = uf.toKor(request.getParameter("LAN"));

      int IDX = cm.DblCheck(tName, country, gov, typemain, typesub, lang);
      if(IDX > 0)
      {
            response.sendRedirect("overview_modify.jsp?TOVIEW_IDX=" + IDX);
      }else{
            response.sendRedirect("overview_write.jsp?tName=" + tName + "&country=" + country + "&government=" + gov + "&typeMain=" + typemain + "&typeSub=" + typesub + "&LAN=" + lang);
      }

}catch(Exception e){
      out.println(e);
}

%>

nagunpyo

ASKER

I did not change the version of the compiler

nagunpyo

ASKER

I tried renaming the method in question and the error message was different.

org.apache.jasper.JasperException: Unable to compile class for JSP

An error occurred at line: 5 in the jsp file: /admin/region/overview_proc.jsp

Generated servlet error:
[javac] Compiling 1 source file

/usr1/projects/tomcat4.1.31-near/work/Standalone/203.233.205.19/app/admin/region/overview_proc_jsp.java:98: cannot resolve symbol
symbol : method DoubleChechk (java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String)
location: class com.near.region.RegionalManager
      int IDX = cm.DoubleChechk(tName, country, gov, typemain, typesub, lang);
^
1 error

      at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:85)
      at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:248)
      at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:315)
      at org.apache.jasper.compiler.Compiler.compile(Compiler.java:328)
      at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:427)
      at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:142)
      at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:240)
      at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:187)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:200)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:146)
      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:209)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:144)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
      at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2358)
      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:133)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
      at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:118)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
      at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:116)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
      at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:127)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
      at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:152)
      at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:300)
      at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:374)
      at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:743)
      at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:675)
      at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:866)
      at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
      at java.lang.Thread.run(Thread.java:536)

so, I guess Tomcat does know about the method.

koppcha

This time
i think you have a typo there

>int IDX = cm.DoubleChechk(tName, country, gov, typemain, typesub, lang);
PLease check the typos in this case other wise you should not get the no element found exception.The name you specified in JSP is different from the name in the java class "RegionalManager".

nagunpyo

ASKER

I did it on purpose to see if Tomcat actually knows about the method.
And since the error message was different when I tried to access a method that doesn't exist, I guess Tomcat did know about the method before and java.lang.NoSuchMethodError does not actually mean the method doesn't exist in the class.

nagunpyo

ASKER

OK... it seems like I can't add any methods into the file anymore.
I added a simple 1-line testing method and tried call it from jsp, the same error message. @_@

koppcha

From javadocs
Thrown if an application tries to call a specified method of a class (either static or instance), and that class no longer has a definition of that method.
Normally, this error is caught by the compiler; this error can only occur at run time if the definition of a class has incompatibly changed

check this
1>Do you have the package statement in yout java file RegionalManager
package com.near.region;

nagunpyo

ASKER

yeah, i do have that statement...

nagunpyo

ASKER

hmm... i deleted the old class file and recompiled it but it seems like i'm keep on getting back the old version.
i mean, when i recompile, i get a new class file but i think the contents of the new class file is actually the old file.

koppcha

ok change the version of JDK ..which version is that?

SOLUTION

koppcha

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