다름이 아니라.. 아파치+톰캣에서
 Name VirtualHost를 사용해서.. 2개의 도메인을 각각의 사이트를
 만들어 잘 쓰고 있었거든요.!
  예을 들면 aaa.com  ->  /usr/aaa/
          bbb.com  ->  /usr/bbb/
으로 쓰고 있었는데
  또하나의 도메인이 생기면서..
         ccc.com ->   /usr/ccc/으로 연결시켜
 virtualhost로 쓰려고 하니 아래와 같은 오류가 났거든요!
  default 사이트는 아파치에서.. aaa.com으로 잡혀있고요
  사이트에서 에러가 이렇게 나거든요!
 원인을 찾을수가 없어서. 이렇게 도움을 요청합니다.
   Apache Tomcat/4.0.2 - HTTP Status 500 - Internal Server Error
 --------------------------------------------------------------------------------
 type Exception report
 message Internal Server Error
 description The server encountered an internal error (Internal Server Error) that prevented it from fulfilling this req
uest.  exception
 javax.servlet.ServletException
	at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:463)
	at org.apache.jsp.view_0005fcatalog$jsp._jspService(view_0005fcatalog$jsp.java:732)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
	at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:202)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:382)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:474)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243)
	at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:190)
	at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
	at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
	at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
	at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2343)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
	at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
	at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
	at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
	at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
	at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)
	at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
	at org.apache.catalina.connector.warp.WarpRequestHandler.handle(WarpRequestHandler.java:215)
	at org.apache.catalina.connector.warp.WarpConnection.run(WarpConnection.java:194)
	at java.lang.Thread.run(Thread.java:536)
  root cause
 java.lang.OutOfMemoryError