Simple JSP leaks memory?

Simple HelloWorld.jsp leaks memory significantly. Tested with SoapUI setup with 40 clients driving load. At around invocation 100,000 the WLS server simply leaks enough memory to hit the upper heap size and dies. I'm running V10.3.2 (latest) in Production mode with the JRocket JVM. I also tried the same test with HelloWorld.HTML file and found no memory leaks, it runs HTML test fine up to 1,000,000 invocations with no memory or thread leaks.
This test can not be any simpler.
Also, performance goes down significantly as memory leaks! I go from 500tps down to 100tps just prior to running out of memory.
The JSP file is extremely simple, here's the code:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Hello World JSP</title>
</head>
<body>
Hello World!
</body>
</html>
Why would such a simple JSP file cause the WebContainer to leak memory? I'm at a loss here.
Edited by: user9200447 on Feb 26, 2010 10:47 AM

It depends on the test being run. One possibility is it may be due to implicit session objects.
Try using session=false otherwise session objects are created implicitly for this jsp. Dependng on sesson timeout, hits and java heap memory size you can run out of memory
HTH

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Etat HTTP 500 -
type Rapport d'exception
message
description Le serveur a rencontr� une erreur interne () qui l'a emp�ch� de satisfaire la requ�te.
exception
org.apache.jasper.JasperException: Impossible de compiler la classe pour la JSP
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Erreur de servlet g�n�r�e:
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Erreur de servlet g�n�r�e:
C:\jakarta-tomcat-5.0.19\work\Catalina\localhost\_\org\apache\jsp\confirm_jsp.java:46: cannot resolve symbol
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Une erreur s'est produite � la ligne: 2 dans le fichier jsp: /confirm.jsp
Erreur de servlet g�n�r�e:
C:\jakarta-tomcat-5.0.19\work\Catalina\localhost\_\org\apache\jsp\confirm_jsp.java:48: cannot resolve symbol
symbol : class Fruit
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Une erreur s'est produite � la ligne: 16 dans le fichier jsp: /confirm.jsp
Erreur de servlet g�n�r�e:
C:\jakarta-tomcat-5.0.19\work\Catalina\localhost\_\org\apache\jsp\confirm_jsp.java:71: cannot resolve symbol
symbol : class Fruit
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Une erreur s'est produite � la ligne: 17 dans le fichier jsp: /confirm.jsp
Erreur de servlet g�n�r�e:
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symbol : class Fruit
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location: class org.apache.jsp.confirm_jsp
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Une erreur s'est produite � la ligne: 19 dans le fichier jsp: /confirm.jsp
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 org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
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--------------------------------------------------------------------------------

hello i tried what you told me but it steel seems i've
got 2 errors
here's the error
exception
org.apache.jasper.JasperException: Impossible de
compiler la classe pour la JSP
Une erreur s'est produite � la ligne: 5 dans le
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C:\jakarta-tomcat-5.0.19\work\Catalina\localhost\_\org\
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C:\jakarta-tomcat-5.0.19\work\Catalina\localhost\_\org\
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Couleur : <jsp:getProperty name="commandeFruit"
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Prix au kg : <jsp:getProperty name="commandeFruit"
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Quantit� : <jsp:getProperty name="commandeFruit"
property="poids" /> 
Total
:�<%=commandeFruit.getPrix()*commandeFruit.getPoid
() %> Euros
Revenir � la commande pour
la modifier
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</html>
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I'm using ODP.NET version 2.102.2.20.
Thanks

Thanks for the reply. I am using .NET 2.0 SP2. I upgraded the ODP.NET client to 2.111.7.20 but am still seeing leakage of the OracleDecimal structs.
Here's a snippet of output from WinDbg:
Ready for finalization 32874 objects (0b4de540->0b4fe6e8)
Statistics:
MT Count TotalSize Class Name
00fb8cec 32816 656320 Oracle.DataAccess.Types.OpoDecCtx
With each pass of the service the Count and TotalSize grow in increments equal to the number of rows I'm querying...
Just for laughs I changed the GetOracleDecimal statement to GetDecimal and the memory issue went away (because I'm no longer creating OracleDecimals). But I need to use the higher precision type to prevent overflows..
Thanks again..

Does ReportDocument leak memory?

Using CrystalDecisions.CrystalReports.Engine.ReportDocument XI R2. w3wp.exe memory use raises while a report is generated (which is expected), yet it does not seem to be ever released after. If you keep generating same report again and again, IIS eventually runs out of memory. A report does not call any external DLLs or COM objects. Calling repDoc.Dispose() does not seem to help. Please help. 

Methods:
Dispose()
GC.WaitForPendingFinalizers()
GC.Collect()
Details:
I created a C# application that connects to BOXI.
It does not specifically use the ReportDocument object, but was also encountering serious memory issues.
I was also using the Dipose method to mark objects for garbage collection.
.Net garbage collection happens automatically (at some time or another), but you can force it using GC.Collect(). I tried this, but was still leaking memory.
Until I found GC.WaitForPendingFinalizers(), which causes the garbage collector to wait until all disposed objects have completely finished their destructors. I think this made the difference with BOXI objects, because they are nested.
After I was using all three methods, I had no more memory issues. I realize this information may be out of date, but I posted it for future seekers.

Simple JSP leaks memory?

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