coldfusion 8 out of memory error

It didn't work.  I am getting this.  

500
 
ROOT CAUSE: 
java.lang.OutOfMemoryError: Java heap space
 
 
javax.servlet.ServletException: ROOT CAUSE: 
java.lang.OutOfMemoryError: Java heap space
 
	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)
                                              

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heap size can be changed in CF administrator, but can be very dangerous

Yes, however why and how?

also you can check if you  are running the latest java jvm.

Also in order to chnage the heap size do the following :
1.login to cf admin
2.go to Server setting --Java and jvm

Directly under Server Settings -- Java and jvm does not exist.

However, under Server Settings: Setting Summary this information is listed:

Java Version  1.6.0_04    
Java Vendor  Sun Microsystems Inc.    
Java Vendor URL  http://java.sun.com/    
Java Home  C:\JRun4\jre    
Java File Encoding  Cp1252    
Java Default Locale  en_US    
File Separator  \    
Path Separator  ;    
Line Separator  Chr(13)    
User Name  SYSTEM    
User Home  C:\Documents and Settings\Default User    
User Dir  C:\JRun4\bin    
Java VM Specification Version  1.0    
Java VM Specification Vendor  Sun Microsystems Inc.    
Java VM Specification Name  Java Virtual Machine Specification    
Java VM Version  10.0-b19    
Java VM Vendor  Sun Microsystems Inc.    
Java VM Name  Java HotSpot(TM) 64-Bit Server VM    
Java Specification Version  1.6    
Java Specification Vendor  Sun Microsystems Inc.    
Java Specification Name  Java Platform API Specification    
Java Class Version  50.0    

The java and JVM is right before the Settings Summary

Hmmmm. I don't see it..  See attached picture.

are  you an admin for the cf Administrator, if not contact the whoever has the admin priviliges

I log into the coldfusion administrator using the administrator account?!?

I have the highest level of privileges on that box.  

ok, it took me three days, however I finally got through to Adobe.  (sat in a queue for two days)

They gave me a solution to increase the heap.  It involves changing the jvm.config file.

I will try tonight and update.

Adobe says I need to rewrite my application.  I have opened up the heap space without success.  I need to figure out what I am going to do.  It is absurd.  That box has so much memory in it.

Did they specify what part of your application they think you need to rewrite?  For example, are you putting a ton of information into the session or application scope variables?

You are correct, I am using a good deal of session variables (array), however that application worked in coldfusion 7.  It should work in 8.

They recommended I upgrade my jre and coldfusion version with the latest patches.

I used to do some big arrays/structures in order to do complex calculations and processing.  I converted it to the database and cut my processing time down by 90%.   So something to consider for the future anyway..

But you're right, it shouldn't stop working, make sure you're at at least CF 8.0.1

> But you're right, it shouldn't stop working

Odd that increasing the heap did not help. Exactly how much memory are you talking about? To suggest you must "rewrite the application" sounds like a hell of a lot of memory is being used ... What jre and cf version are you using now?

I have had no success in getting this to run.  Adobe offered suggestions, however in the end they told me to rewrite the application.  Frustrating.

Some great ideas, however nothing is working.  I think I am going to need to rewrite this.

This is what needed to be added in you JVM Config file.

in the following example, i have increased the memory to 1GB, you can do less than if you have less system memory.

# Arguments to VM
java.args=-server -Xmx1024m -Xms1024m -Dsun.io.useCanonCaches=false -XX:PermSize=64m -XX:+UseConcMarkSweepGC -XX:NewSize=48m -XX:SurvivorRatio=4 -XX:+UseParNewGC -XX:MaxPermSize=192m

As for the out of memory issue, you use a garbage collection ( I am sure you about Garbage Collection) routine that i had found from internet and use coldfusion administrator web access to schdule a task to run this after 1 hour intially, that could be modified accordingly.

here is code, just save this as .cfm file and upload to your site.

====================================

<html>
<head>
<script type='text/javascript' src='http://www.karaokewh.com/ajax/core/prototype.js'></script>
<script type='text/javascript' src='http://www.karaokewh.com/ajax/core/suggest.js'></script>
<script type='text/javascript' src='http://www.karaokewh.com/ajax/core/engine.js'></script>
<script type='text/javascript' src='http://www.karaokewh.com/ajax/core/util.js'></script>
<script type='text/javascript' src='http://www.karaokewh.com/ajax/core/settings.js'></script>
<script type='text/javascript'>_cfscriptLocation = "../ajax/functions.cfm";</script>
<script type="text/javascript">
function getData()
{
DWREngine._execute(_cfscriptLocation, null, 'checkMemory', getDataResult);
}

function getDataResult(obj)
{
document.getElementById("free").innerHTML = obj.FREEMEMORY;
document.getElementById("total").innerHTML = obj.TOTALMEMORY;
document.getElementById("max").innerHTML = obj.MAXMEMORY;
document.getElementById("perfree").innerHTML = obj.PERCENTFREE;
}
</script>
</head>
<body onLoad="getData();">
<cfset runtime = CreateObject("java","java.lang.Runtime").getRuntime()>
<cfset freeMemory = runtime.freeMemory() / 1024 / 1024>
<cfset totalMemory = runtime.totalMemory() / 1024 / 1024>
<cfset maxMemory = runtime.maxMemory() / 1024 / 1024>

<cfoutput> <strong>Before GC call...</strong><br />
Free Allocated Memory: #Round(freeMemory)#mb<br>
Total Memory Allocated: #Round(totalMemory)#mb<br>
Max Memory Available to JVM: #Round(maxMemory)#mb<br>
<br />
</cfoutput>

<!--- Garbage collect --->
<cfset obj = CreateObject("java", "java.lang.System")>
<cfset result = obj.gc()>
<cfset runtime = CreateObject("java","java.lang.Runtime").getRuntime()>
<cfset freeMemory = runtime.freeMemory() / 1024 / 1024>
<cfset totalMemory = runtime.totalMemory() / 1024 / 1024>
<cfset maxMemory = runtime.maxMemory() / 1024 / 1024>

<cfoutput> <strong>After GC call...</strong><br />
Free Allocated Memory: <span id="free">#Round(freeMemory)#</span>mb<br>
Total Memory Allocated: <span id="total">#Round(totalMemory)#</span>mb<br>
Max Memory Available to JVM: <span id="max">#Round(maxMemory)#</span>mb<br>
Percent Free: <span id="perfree"></span>%<br>
</cfoutput>
<input type="button" onClick="getData();" value="Refresh">
</body>
</html>

================================================

Hope this will help, as i know how frustrated this can be,,,