title: Handling 500 JRun servlet in ColdFusion
body: <p>All -</p>
  
  <p>Is there a way to handle a 500 JRun servlet error in ColdFusion? I tried using <code>cferror</code> as well as using the site-wide handler in ColdFusion admin, but it does not seem to be working.</p>
  
  <p>Here is the error message</p>
  
  <pre><code>500
  
  ROOT CAUSE:  java.lang.IllegalArgumentException     at
  coldfusion.filter.FormScope.parseName(FormScope.java:408)   at
  coldfusion.filter.FormScope.parseQueryString(FormScope.java:360)    at
  coldfusion.filter.FormScope.parsePostData(FormScope.java:328)   at
  coldfusion.filter.FormScope.fillForm(FormScope.java:278)    at
  coldfusion.filter.FusionContext.SymTab_initForRequest(FusionContext.java:438)   at 
  coldfusion.filter.GlobalsFilter.invoke(GlobalsFilter.java:33)   at
  coldfusion.filter.DatasourceFilter.invoke(DatasourceFilter.java:22) at
  coldfusion.filter.RequestThrottleFilter.invoke(RequestThrottleFilter.java:126)  at 
  coldfusion.CfmServlet.service(CfmServlet.java:200)  at
  coldfusion.bootstrap.BootstrapServlet.service(BootstrapServlet.java:89) at 
  jrun.servlet.FilterChain.doFilter(FilterChain.java:86)  at
  coldfusion.monitor.event.MonitoringServletFilter.doFilter(MonitoringServletFilter.java:42)  at
  coldfusion.bootstrap.BootstrapFilter.doFilter(BootstrapFilter.java:46)  at 
  jrun.servlet.FilterChain.doFilter(FilterChain.java:94)  at
  jrun.servlet.FilterChain.service(FilterChain.java:101)  at
  jrun.servlet.ServletInvoker.invoke(ServletInvoker.java:106)     at
  jrun.servlet.JRunInvokerChain.invokeNext(JRunInvokerChain.java:42)  at
  jrun.servlet.JRunRequestDispatcher.invoke(JRunRequestDispatcher.java:286)   at
  jrun.servlet.ServletEngineService.dispatch(ServletEngineService.java:543)   at
  jrun.servlet.jrpp.JRunProxyService.invokeRunnable(JRunProxyService.java:203)    at
  jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool.java:428)   at 
  jrunx.scheduler.WorkerThread.run(WorkerThread.java:66)
  
  
  javax.servlet.ServletException: ROOT CAUSE: 
  java.lang.IllegalArgumentException  at
  coldfusion.filter.FormScope.parseName(FormScope.java:408)   at
  coldfusion.filter.FormScope.parseQueryString(FormScope.java:360)    at
  coldfusion.filter.FormScope.parsePostData(FormScope.java:328)   at
  coldfusion.filter.FormScope.fillForm(FormScope.java:278)    at
  coldfusion.filter.FusionContext.SymTab_initForRequest(FusionContext.java:438)   at 
  coldfusion.filter.GlobalsFilter.invoke(GlobalsFilter.java:33)   at
  coldfusion.filter.DatasourceFilter.invoke(DatasourceFilter.java:22) at
  coldfusion.filter.RequestThrottleFilter.invoke(RequestThrottleFilter.java:126)  at 
  coldfusion.CfmServlet.service(CfmServlet.java:200)  at
  coldfusion.bootstrap.BootstrapServlet.service(BootstrapServlet.java:89) at 
  jrun.servlet.FilterChain.doFilter(FilterChain.java:86)  at
  coldfusion.monitor.event.MonitoringServletFilter.doFilter(MonitoringServletFilter.java:42)  at
  coldfusion.bootstrap.BootstrapFilter.doFilter(BootstrapFilter.java:46)  at 
  jrun.servlet.FilterChain.doFilter(FilterChain.java:94)  at
  jrun.servlet.FilterChain.service(FilterChain.java:101)  at
  jrun.servlet.ServletInvoker.invoke(ServletInvoker.java:106)     at
  jrun.servlet.JRunInvokerChain.invokeNext(JRunInvokerChain.java:42)  at
  jrun.servlet.JRunRequestDispatcher.invoke(JRunRequestDispatcher.java:286)   at
  jrun.servlet.ServletEngineService.dispatch(ServletEngineService.java:543)   at
  jrun.servlet.jrpp.JRunProxyService.invokeRunnable(JRunProxyService.java:203)    at
  jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool.java:428)   at 
  jrunx.scheduler.WorkerThread.run(WorkerThread.java:66)  at
  coldfusion.monitor.event.MonitoringServletFilter.doFilter(MonitoringServletFilter.java:70)  at
  coldfusion.bootstrap.BootstrapFilter.doFilter(BootstrapFilter.java:46)  at 
  jrun.servlet.FilterChain.doFilter(FilterChain.java:94)  at
  jrun.servlet.FilterChain.service(FilterChain.java:101)  at
  jrun.servlet.ServletInvoker.invoke(ServletInvoker.java:106)     at
  jrun.servlet.JRunInvokerChain.invokeNext(JRunInvokerChain.java:42)  at
  jrun.servlet.JRunRequestDispatcher.invoke(JRunRequestDispatcher.java:286)   at
  jrun.servlet.ServletEngineService.dispatch(ServletEngineService.java:543)   at
  jrun.servlet.jrpp.JRunProxyService.invokeRunnable(JRunProxyService.java:203)    at
  jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool.java:428)   at 
  jrunx.scheduler.WorkerThread.run(WorkerThread.java:66)
  </code></pre>