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502 Bad Gateway error during process

Michael Wysocki
Greenhorn

Joined: Dec 16, 2011
Posts: 1

posted

0

Hello.
I'm working on application in JSF to processing XLS files. When time of process is longer than 5 minutes web browser returns 502 Bad Gateway error, but process is still working on the server side. The problem is because of outbound socket timeout (value of timeout can not be changed).
I tried using JavaScript and Ajax request in JSP page, but it still doesn't work.

JSP page code:

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsf/html" prefix="h"%>
<%@taglib uri="http://java.sun.com/jsf/core" prefix="f"%>
<%@taglib uri="http://myfaces.apache.org/tomahawk" prefix="t"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">

<f:view>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
    <title>XLS maker</title>

<script language="JavaScript">
        function wait(){
         alert("Click OK and wait.");
        }
    </script>
    
<script type="text/javascript">
function loadXMLDoc()
            {
           
                var xmlhttp;
                if (window.XMLHttpRequest)
                {// code for IE7+, Firefox, Chrome, Opera, Safari
                    xmlhttp=new XMLHttpRequest();
                }
                else
                {// code for IE6, IE5
                    xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
                }
                xmlhttp.onreadystatechange=function()
                {
                    if (xmlhttp.readyState==4 && xmlhttp.status==200)
                    {
                        document.getElementById("myDiv").innerHTML=xmlhttp.responseText;
 
                    }
                }
                xmlhttp.open("POST","test.txt",true);
                xmlhttp.send(null);
            }
            
var c=0;
             
function myLoop(){
             c++;
             loadXMLDoc();
             document.getElementById("counter").innerHTML=c;
             setTimeout("myLoop()", 1000);
            }
</script>
    
</head>
<body onload="myLoop()">
  <%@ include file="/WEB-INF/template/header2.jsp" %>
        <center>
          <h2><font face="Arial" size="2">Choose file:</font></h2>
          <h:form>
            <t:inputFileUpload id="fileupload" value="#{Bean.input}" required="true"/>
            <t:commandButton value="Make process" action="#{Bean.makeProcess}" onclick="wait();"/>
            <t:outputText value="#{Bean.result}" /><br></br>
          </h:form>
        </center>
  <%@ include file="/WEB-INF/template/footer.jsp" %>
<div id="myDiv"></div>
<div id="counter"></div>
</body>
</html>
</f:view>

Please help.

Regards,
Michael

I agree. Here's the link: http://ej-technologies/jprofiler - if it wasn't for jprofiler, we would need to run our stuff on 16 servers instead of 3.

subject: 502 Bad Gateway error during process

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