----- Original Message ----- From: "Jim Urban" <[EMAIL PROTECTED]> To: "Tomcat Users List" <[EMAIL PROTECTED]> Sent: Tuesday, December 04, 2001 4:07 PM Subject: RE: HTTP method POST is not supported by this URL
> > So, doPost calls itself in an endless loop, sending the servlet into > oblivion... > Or until a java.lang.StackOverflowError exception is thrown. :) > > Seriously, if a servlet gets a StackOverflowError does that impact Tomcat? > That is, can Tomcat run out of stack space if a loop in a servlet gets out > of control. > > Jim >[...] I am testing it :-) * the following is my code: public class Test0 extends HttpServlet { public void service(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException { res.setContentType("text/html"); PrintWriter out = res.getWriter(); m(); out.println("hahahahaha"); out.close(); out=null; } private void m(){ m(); } } * the following is the result: - when I first invoke Test0, I got the following output in my browser - then I can invoke MyServlet class(es) - but if I invoke Test0 _again_, the "DOS prompt" of TC4.0 closed by itself !! (I didn't use "shutdown" commond to close it) * output: A Servlet Exception Has Occurred Exception Report: javax.servlet.ServletException: Invoker service() exception at org.apache.catalina.servlets.InvokerServlet.serveRequest(Unknown Source) at org.apache.catalina.servlets.InvokerServlet.doGet(Unknown Source) at javax.servlet.http.HttpServlet.service(HttpServlet.java:740) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Unknown Source) at org.apache.catalina.core.ApplicationFilterChain.doFilter(Unknown Source) at org.apache.catalina.core.StandardWrapperValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.catalina.core.StandardContextValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.catalina.core.StandardContext.invoke(Unknown Source) at org.apache.catalina.core.StandardHostValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown Source) at org.apache.catalina.valves.AccessLogValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.catalina.core.StandardEngineValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.catalina.connector.http.HttpProcessor.process(Unknown Source) at org.apache.catalina.connector.http.HttpProcessor.run(Unknown Source) at java.lang.Thread.run(Thread.java:484) Root Cause: java.lang.StackOverflowError at Test0.m(Test0.java:23) at Test0.m(Test0.java:23) at Test0.m(Test0.java:23) at Test0.m(Test0.java:23) at Test0.m(Test0.java:23) ... (many...) Bo Dec.04, 2001 -- To unsubscribe: <mailto:[EMAIL PROTECTED]> For additional commands: <mailto:[EMAIL PROTECTED]> Troubles with the list: <mailto:[EMAIL PROTECTED]>