JRC and JSP memory leak...

Hi, I have an web application with Crystal Reports integrated via the JRC. However, I have a memory leak within the application. I have narrowed it down to the JSP which uses JRC code. The NetBeans profiler shows a memory leak, it appears to be a leak with the JRC code with the class (com.crystaldecisions.reports.exporters.format.page.pdf.pdflif.f). I have try changing the <timeout> tag in CRConfig and using .dispose() and .close(), all to no avail. This error may jepordize our latest production release... Please, help...

Best to download 2.0 and install all patches and test again. If not resolved then post your issue with details and code samples.

Similar Messages

COM+ and OLEDB - memory leak in OCI dlls

Hi forum,
I've a COM+ DLL written in C++ which uses OLEDB(Oracle 8.1.7 provider) to reach to the 8i database. I've observed that after some 1000 database activities the DLLhost.exe hogs on memory to the tune of 50MB and never releases the same. I also saw the same behavior with a Win32 console application. For some reason the Uninitialize of the IDBIntialize does not seem to reduce the memory. I also ran bounce checker on my code. And its pointing to the OCI dlls for a memory leak of 18K per each database activity.
I downloaded the OLEDB sample code(VCOLEMRecordsSample) from the OTN site:-
http://otn.oracle.com/sample_code/tech/windows/ole_db/oledb8/index.html
This also seems to hold on to memory after successive run of SQL queries.
Is there anything that I am missing. I am curious about the fact that it happens with the sample app hosted on the OTN site. Do I need some OCI patches to be applied to the client? In fact, applied couple of them, but does not help.
Appreciate any pointers!

I am using 8.1.7.3.2. In fact I applied this patch recently.
Also today I detected a memory leak in my code.
After GetColumnsInfo() call I was not releasing the last param(ppStringsBuffer).
This seems to have fixed the problem. I tried running the win32 console app for 5,000 runs(each run has 2 SQL queries and 1 stored proc). The peak mem usage stays stable around 26MB and the mem usage varies from 8MB to 26MB. I guess this is fine, any info?

GIFImageReader and JPEGImageReader memory leak

We are calling GIFImageReader and JPEGImageReader a lot but find that they have have memory leaks. When repeatedly reading images using the GIFImageReader and JPEGImageReader classes in the com.sun.imageio.plugins.jpeg package, some memory is never reclaimed. These classes use native code, and we believe this is where the leaks are. Indeed, by monitoring the Java heap size, we see that it is always returning to its initial level after the images have been read. However, the virtual memory size in the OS (Windows in our case) continues to grow, and never decreases.
We are cleaning up as much as we can after we are finished with the images. We are calling flush() on the images. We are also calling reset() and dispose() on the image readers. This should minimize the amount of work done in the reader's finalize() method, so we do not believe that this is related to Sun bug 4827358.
We have also tried using the plug-in reader classes from JAI. If anything, these classes leak more.
Any help would be much appreciated.

Yeh, I've noticed this too, Reloading into the same buffered image, only 1 Pic at a time,
Sometimes after 20 -30 images, i'm Out of Memory ( Win98 ), . It doesn't seem to happen with large
.TIF files, . if there is some workaround understandable by a mere hobbyist, I'd also like to hear.

1.6.0_10 and 11, Memory leak returning variables from Java to JavaScript

Environment: Windows XP SP2, IE7, JScript 5.7, JRE 1.6.0_11-b03 and 1.6.0_10
Memory allocated in Java and returned as a JavaScript variable value is not garbage collected in Java when the JavaScript variable is re-used.
In the following simplified example, a populated HashMap is returned from the applet test1 method to the JavaScript variable hash1.
The JavaScript variable hash1 is re-used on the next iteration so I would expect it should be marked for garbage collection.
In 1.6.0_7 and previous releases, the memory associated with this Java HashMap is freed implicitly.
In 1.6.0_10 and 1.6.0_11 the HashMap memory is never freed.
Is this is what we should expect, a feature of the significant LiveConnect changes that were part of 1.6.0_10?
Do we need to rewrite our code to call new Java methods from JavaScript explicitly freeing the memory, in this example calling the freeMem method?
Has anybody else experienced this problem since 1.6.0_10?
Thanks
Rob
Example code ...
TestRLApplet.java
import java.applet.Applet;
import java.util.HashMap;
public class TestRLApplet extends Applet
private HashMap hash1;
public TestRLApplet()
public void init()
public HashMap test1()
hash1 = new HashMap();
for (int i = 0; i <10; i++) {
hash1.put(Integer.toString(i),Integer.toString(i));
return (hash1);
public void freeMem() {
hash1.clear();
hash1 = null;
TestClient.htm
<HEAD>
<TITLE></TITLE>
<SCRIPT LANGUAGE="javascript">
function window_onload()
var hash1;
testAppplet = document.TestRLApplet;
for (cnt=0; cnt < 1000; cnt++)
hash1= testAppplet.test1();
</SCRIPT>
</HEAD>
<object
classid = "clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
WIDTH = 1 HEIGHT = 1 NAME = "TestRLApplet" >
<PARAM NAME = CODE VALUE = "TestRLApplet.class" >
<PARAM NAME = ARCHIVE VALUE = "../applets/TestRLApplet.jar" >
<PARAM NAME = NAME VALUE = "TestRLApplet" >
<PARAM NAME = MAYSCRIPT VALUE = true >
<param name = "type" value = "application/x-java-applet;version=1.6">
<param name = "scriptable" value = "false">
</object>
<BODY LANGUAGE=javascript onload="return window_onload()" leftMargin=40 id=body >
</BODY>
</HTML>
Java Console
Java Plug-in 1.6.0_10
Using JRE version 1.6.0_10 Java HotSpot(TM) Client VM
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
Memory: 5,056K Free: 2,551K (50%) ... completed.
Memory: 7,996K Free: 3,499K (43%) ... completed.
Memory: 7,996K Free: 1,038K (12%) ... completed.
Memory: 13,180K Free: 3,745K (28%) ... completed.
Memory: 22,844K Free: 5,614K (24%) ... completed.
Memory: 37,984K Free: 15,009K (39%) ... completed.
Memory: 37,984K Free: 13,069K (34%) ... completed.
Memory: 37,984K Free: 6,125K (16%) ... completed.
Memory: 65,088K Free: 25,107K (38%) ... completed.
Memory: 65,088K Free: 21,201K (32%) ... completed.
Memory: 65,088K Free: 13,381K (20%) ... completed.
Memory: 65,088K Free: 7,967K (12%) ... completed.
Memory: 65,088K Free: 5,013K (7%) ... completed.
Memory: 65,088K Free: 414K (0%) ... completed.

What are you missing?
I inherited this app and signing the third party jars is how it was setup, I was wondering the same thing too, why was it necessary to sign the third party jars?
The applet runs in either JRE 1.6.0_13 or JRE 1.6.0_27 depending on the other Java apps the user uses. JRE 1.6.0_13 does not have the mixed code security (so it is like is disable), but JRE 1.6.0_27 does have the mixed code security and the applet will not launch with mixed code security enable, so we have to disable it. With all the hacking going on in the last two years, is important to improve security; so this is a must.
Yes, I always clear up the cache.
Any idea on how to resolve this problem?

Mail.app and huge memory leak

Mail.app have some serious memleaks: http://jabster.nazwa.pl/MailAppMemLeak.mov (recorded from activity monitor). Mail.app can eat all memory and cause system to become unrespondable. Anyone have similar issue?

Solved it!
I have several email accounts configured in Mail. While Mail was eating up the memory, I've noticed the rotating circle at one of the accounts indicating Mail is doing something with it. This particular account was Google mail via IMAP. What I did to resolve problem is I deleted Google mail from my accounts and I've restarted Mail. Things turned back to normal! Then I've added GMail account again, and it is working like a charm since, Mail is using only 238Mb of memory.
Therefore, I can conclude there is a bug in Mail handling email accounts (in my case Google mail via IMAP) and it is doing something with that account that increasingly takes ridiculous amounts of memory. Removing the account in questions, restarting Mail and adding the account again has solved the problem in my case :))
Danny

Memory leaks with Njawin and COm Object

I'm using njawin 1.1 to use a DRM Microsoft object form java and all works
very well .... very good bridge !!
But I found a problem that seems like a "memory leak" in calling a method,
in this lines code :
myLicense = myLicenseObj.GetLicenseToDeliver();
System.out.println(myLicense);
myResponseObj.AddLicense("2.0.0.0", myLicense);
myResponseObj.setReplaceQuotesWith("\\\"");
myLicResponse = myResponseObj.GetLicenseResponse();
The only particularity in this code the length of myLicense string : 7 KB
If I run the program 1000 times the server use 100 Mb of ram and not release
them.
I try to use ASP to replicate the problem but nothing happens ... the
program works and not memory leak appears and than I think taht the probelm
may be in marshalling / unmarshalling string routine from/to the DRM object
Thanks a lot for all help

Me funciono colocando el progID de la interfaz que genero jawin en el constructor de la clase que se genero, despues utilice los metodos y fue transparente:
Interfaz que genero jawin:::
public interface CodeIMG {
public static final GUID clsID = new GUID("{23435XCVDF2-6D62-6749- 8E00-00AS45GH87JU}");
public static final String progID = new String("ActivexPDF.CodeIMG");
la clase que genero jawin:::::::
public class _CodeWER extends DispatchPtr {
public int getTypeInfoToken() {
return 0;
static public final GUID proxyIID = new GUID("{632PHK77-6F0B-11D4-8PLD-00A024A31CC6}");
static public final int iidToken;
static {
iidToken = IdentityManager.registerProxy(proxyIID, _CodeWER.class);
public int getGuidToken() {
return iidToken;
* Creates empty _CodeWER Object
public _CodeWER() throws COMException {
super();
* Creates _CodeWER() Object with progID
public _CodeWER()(String progid) throws COMException {
super(progid);
* Queries interface of _CodeWER Object
public _CodeWER()(IUnknown other) throws COMException {
super(other);
* Creates _CodeWER() Object with CLSID
public _CodeWER(GUID ClsID) throws COMException {
super(ClsID);
public boolean createImg(ObjectRef strChain, ObjectRef strFile) throws COMException {
return ((java.lang.Boolean) invokeN("createImg", new Object[]{strChain, strFile}, 2)).booleanValue();
Test de Prueba:::::::
public class TestDLL implements CodeIMG {
     public static void main(String[] args) {
          try {
               CodeWER pdf = new CodeWER ( clsID );
               boolean ok = pdf.createImg(new ObjectRef("9999999"), new ObjectRef("C:\\image.bmp") );
               System.out.println("Lo generoi bien:: " + ok );
          } catch (COMException e) {
               e.printStackTrace();
Espero te sirva este ejemplito sencillo de jawin
Saludos!!!!!!!!!!!!
att juo

Memory leak in string class

We have developed our application in Solaris 10 environment. While running Purify on that it shows leak in the string class. This leak is incremental and so process size keeps in increasing. If we replace string with char array, the leaks disappears and process size also becomes stable.
Following is the snapshot of the memory leak stack reported by Purify:
MLK: 4505 bytes leaked in 85 blocks
* This memory was allocated from:
malloc [rtlib.o]
operator new(unsigned) [libCrun.so.1]
void*operator new(unsigned) [rtlib.o]
__rwstd::__string_ref<char,std::char_traits<char>,std::allocator<char> >*std::basic_string<char,std::char_traits<char>,std::allocator<char> >::__getRep(unsigned,unsigned) [libCstd.so.1]
char*std::basic_string<char,std::char_traits<char>,std::allocator<char> >::replace(unsigned,unsigned,const char*,unsigned,unsigned,unsigned) [libCstd.so.1]
std::basic_string<char,std::char_traits<char>,std::allocator<char> >&std::basic_string<char,std::char_traits<char>,std::allocator<char> >::operator=(const char*) [libCstd.so.1]
Has anyone faced this problem earlier or is there any patch available for this?

Over time, we have found and fixed memory leaks in the C++ runtime libraries.
Get the latest patches for the compiler you are using. (You didn't say which one.) You can find all patches here:
[http://developers.sun.com/sunstudio/downloads/patches/index.jsp]
Also get the latest Solaris patch for the C++ runtime libraries, listed on the same web page.
If that doesn't fix the problem, please file a bug report at
[http://bugs.sun.com]
with a test case that can be compiled and run to demonstrate the problem.

Memory leak problem while passing Object to stored procedure from C++ code

Hi,
I am facing memory leak problem while passing object to oracle stored procedure from C++ code.Here I am writing brief description of the code :
1) created objects in oracle with the help of "create or replace type as objects"
2) generated C++ classes corresponding to oracle objects with the help of OTT utility.
3) Instantiating classes in C++ code and assigning values.
4) calling oracle stored procedure and setting object in statement with the help of setObject function.
5) deleted objects.
this is all I am doing ,and getting memory leak , if you need the sample code then please write your e-mail id , so that I can attach files in reply.
TIA
Jagendra

just to correct my previous reply , adding delete statement
Hi,
I am using oracle 10.2.0.1 and compiling the code with Sun Studio 11, following is the brief dicription of my code :
1) create oracle object :
create or replace type TEST_OBJECT as object
( field1 number(10),
field2 number(10),
field3 number(10) )
2) create table :
create table TEST_TABLE (
f1 number(10),f2 number (10),f3 number (10))
3) create procedure :
CREATE OR REPLACE PROCEDURE testProc
data IN test_object)
IS
BEGIN
insert into TEST_TABLE( f1,f2,f3) values ( data.field1,data.field2,data.field3);
commit;
end;
4) generate C++ classes along with map file for database object TEST_OBJECT by using Oracle OTT Utility
5) C++ code :
// include OTT generate files here and other required header files
int main()
int x = 0;
int y = 0;
int z =0;
Environment *env = Environment::createEnvironment(Environment::DEFAULT);
Connection* const pConn =
env->createConnection"stmprf","stmprf","spwtrgt3nms");
const string sqlStmt("BEGIN testProc(:1) END;");
Statement * pStmt = pConn->createStatement(sqlStmt);
while(1)
TEST_OBJECT* pObj = new TEST_OBJECT();
pObj->field1 = x++;
pObj->field2 = y++;
pObj->field3 = z++;
pStmt->setObject(1,pObj);
pStmt->executeUpdate();
pConn->commit();
delete pObj;
}

Memory Leak With Spatial queries

We are using 8.1.6 on NT (4.0) for spatial data queries. We are facing memory leak problems. At the starting our job will run very fast and after some time it will start slipping. I'm monitoring PGA size from v$sessionstat/v$sysstat and it is regularly increasing. Same is the case for memory on NT machine when I'm monitoring thru performance monitor. I have already applied the spatial patch available for 8.1.6 but no improvement.
Please let me know If there is any workaround. When I'm submitting my job in parts and shutdown the database in between then It is releasing all the memory and It is working fine. Without shutting the database it is not relasing the memory even though I stop my spatial data batch job.
null

Hi,
Thanks for your responses.
This is the query:
SELECT a.geo_id, mdsys.sdo_geom.sdo_length(
mdsys.sdo_cs.transform(
mdsys.sdo_geometry(2002, 8307, null,
mdsys.sdo_elem_info_array(1,2,1),
mdsys.sdo_ordinate_array(' | |
longi | |
', ' | |
lati | |
a.geo_geometry.sdo_point.x,
a.geo_geometry.sdo_point.y )),
mdsys.sdo_dim_array(mdsys.sdo_dim_element(' | |
'''' | |
'X' | |
'''' | |
',-180,180, .00000005),
mdsys.sdo_dim_element(' | |
'''' | |
'Y' | |
'''' | |
',-90,90, .00000005)), 41004),
.00000005) * 6.213712e-04 distance_in_miles
FROM ' | |
t_name | |
' a
WHERE mdsys.sdo_nn(a.geo_geometry,
mdsys.sdo_geometry(1, 8307,
mdsys.sdo_point_type(' | |
longi | |
', ' | |
lati | |
', null),
null, null),' | |
'''' | |
'SDO_NUM_RES=5' | |
'''' | |
') = ' | |
'''' | |
'TRUE' | |
'''' | |
AND a.geo_id ' | |
filter | |
ORDER BY 2;
Here we are passing the tname and filter dynamically based on certain conditions and the memory leak is almost 100K to 200K per query.
First I tried to closing the session only but that didn't work. Database shutdown is only able to release the memory. I'm monitoring v$sysstat/v$sesstat and size of oracle.exe in NT performance monitor. Please let me know If something else need to be monitor.
Thanks.
Sandeep
null

Oracle JDBC Thin Driver Memory leak in scrollable result set

Hi,
I am using oracle 8.1.7 with oracle thin jdbc driver (classes12.zip) with jre 1.2.2. When I try to use the scrollable resultset and fetch records with the default fetch size, I run into memory leaks. When the records fetched are large(10000 records) over a period of access I get "outofmemory" error because of the leak. There is no use increasing the heap size as the leak is anyhow there.
I tried using optimizeit and found there is a huge amout of memory leak for each execution of scrollable resultsets and this memory leak is propotional to the no of records fetched. This memory leak is not released even when i set the resultset,statement objects to null. Also when i use methods like scrollabelresultset.last() this memory leak increases.
So is this a problem with the driver or i am doing some wrong.
If some of you can help me with a solution to solve this it would be of help. If needed i can provide some statistics of these memory leaks using optimize it and share the code.
Thanks
Rajesh

This thread is ancient and the original was about the 8.1.7 drivers. Please start a new thread. Be sure to include driver and database versions, stack traces, sample code and why you think there is a memory leak.
Douglas

FLVPlayback Memory Leak in Flash CS3

Hi There,
I' making a flash file with AS2 in Flash CS3. I put a FlVPlayback in stage and let it load a couple of FLV files from my local HDD and playing continuously. I use "addEventListener" to check the current running flash movie is completed. After complete event occur, I load another flv movie to paly again.Here, I noticed that memory usage is increasing every time a new flv file is loaded and played. I heard "addEventListener" in CS3 is causing the memory leak and not being detected by GC.
Please let me know if there is a solution to solve the memory leak issue. I posted my codes here to know something I'm doing wrong.
Thanks in advance...
================================
onClipEvent (load)
    function _fun_complete(eventObj)
        this.autoRewind = "true";
        var _v1 = _root.v;
        var _v2 = _root.FLVlists.length;
        --__v2;
        if (_v1 < _v2)
            ++_v1;
        else
            _v1 = 0;
        this.contentPath = _root.FLVlists[_v1].path;
        var _v3 = _root.listVids[_v1].width;
        var _v4 = (stage._width - _v3) / 2;
        this._x = _v4;
        _root.v = _v1;
        this.play();
    this.addEventListener("complete", _fun_complete);

Helllo Friend,
Thanks for your feedback. The problem with removeEventListener is that , the player stops and not playing anymore. In my application, I nned to loop and play one FLV files after another. For example, I need to play 3 flv files, File1.flv, File2.flv, File3.flv. I load and play File1.flv first. Once complete event trigger from "addEventlisterner" , then I load File2.flv and then File3.flv and then Flie1.flv. So it needs play continuously and causing memory leak. Please let me know if there is another way of working around.
Regards

Fixing Memory Leaks in AIR App?

Hi Friends,
I'm been facing this memory leaks issue in our app and this has taken enough of our time and resources and we are not being able to find a solution for it.
I have identified the problem in the module where we primarily need memory related fixes which is - We are setting Repeater's recycleChildren() property to true/false based upon certain conditions which we cant change. Now when this property is set to false Repeater is supposed to be removing its last created objects from memory and creating fresh ones. In our case repeater is unable to delete those. When I managed to get their instances (using createdChildren()) and freed them in code I called System.gc() for releasing the memory back to OS. Now what is happening is that this approach works fine when I run the app from code but when I create its installer (from Installsheild) and formally out in on machines it does not work. I came to know the reason from following blogs:
http://jvalentino.blogspot.com/2009/05/flex-memory-issue-3-garbage-collection.html
http://gskinner.com/blog/archives/2006/06/as3_resource_ma.html
http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/system/System.htm l#gc()
http://stackoverflow.com/questions/192373/force-garbage-collection-in-as3
http://gskinner.com/blog/archives/2006/08/as3_resource_ma_2.html
Guys, can anyone of you suggest what should I do here? This has become a delivery bottleneck and we need to give a fix where the memroy is released periodically and efficiently so that the end user's system does not hang.
Please help.
Shubhra

Are you sure it doesn't ? Maybe flash does release memory but the OS leaves it assigned as described in the below comment from http://www.mikechambers.com/blog/2008/08/06/what-are-your-biggest-issues-with-adobe-air/co mment-page-3/#comment-26330
"I just finished doing more experiments, I looks like the AIR app does free the memory, but the OS leaves it assignned to the app process, until other apps requiere that memory. So, looks like it is a natural behaviour and the memory leak is not as terrible as I thougth."

Crystal Report Basic for VS 2008 Memory Leak

Hi,
I am having a problem with CR Basic for VS 2008. I can display a report, which I have linked to an DataSet in C#, but when I close the window, I seem to have a memory leak, as verified by process explorer.
I am doing the following when the report window is closing:
myReportViewer.ReportSource = null;
myReportViewer.Dispose();
myReportObject.Close();
myReportObject.Dispose();
GC.Collect();
Any ideas? I have a significant report that is generated and the memory leak is quite significant.
Thanks,
Dave

The memory management you are seeing is an artifact of how the framework manages memory allocations of managed dlls. These dlls are left in memory as it is expect that they may be used later on in your app and reloading these dlls would be a resource intensive process. It is difficult, if not impossible to unload managed dlls and there may not be a good solution. However I suspect that once the managed dlls are loaded, you will see the memory moving in the 38,860 to 40,812 range. This memory will not be freed by the framework until the application is terminated.
Couple of ideas:
1) Trying to find resources on the possibility of unloading managed dlls. Apparently there is a way, but it is cumbersome. Couple of years ago, one of my coworkers spent some time on the issue and eventually gave upu2026 Looking around a bit, I have found the following links that may be of some use to you:
http://blogs.msdn.com/jasonz/archive/2004/05/31/145105.aspx
http://social.msdn.microsoft.com/Forums/en-US/csharpgeneral/thread/a2682b53-12ad-4719-b05c-df1476cb39c9
http://msdn.microsoft.com/en-us/library/system.appdomain.aspx ;
http://www.discussweb.com/c-programming/2391-how-unload-both-managed-unmanaged-dll.html ;
2) Try to see how the latest version of Crystal Reports behaves in your environment. Initially, I would suggest a test on a clean system with an eval version of Crystal Reports 2008. In CR 2008 we manage the memory via the crheapalloc.dll. So the behavior may be different. You can even try to see how CR 2008 behaves without the dll by simply renaming the dll.
An eval download of CR 2008 is here:
http://www.sap.com/solutions/sapbusinessobjects/sme/freetrials/index.epx
Ludek

Windows Audio Device Graph Isolation [audiodg.exe] MEMORY LEAK - EATS OUT 60-85% of CPU

Hello,
I've updated, 2 days ago, from Win 8 to Win 8.1 Pro and this memory leak problem that has occurred to me previously in other Win versions has arrived again. Didn't upgrade from boot, just from the desktop. Cleaned up the previous Windows installations and all
that jazz that was inherent to Windows updates. Tried to fix this problem with the normal method of disabling the enhancements at the playback device but they are gone.
My drivers are all up to date and have a Conexant SmartAudio HD sound platform.
Thanks in advance for any sort of help.

I maybe got a solution for this... (Worked for me)
I
Right-click the speaker icon in the lower right corner.
Select Playback Devices from the menu. A list of devices should appear on the screen.
Double-click the device that has a green checkmark. The properties windows for that device should open.
Click the Enhancements tab at the top.
From the list of enhancements, uncheck all of them, or click the Disable all enhancements checkbox.
Click the OK button to save your changes and close the window.
Click OK to close the Playback Devices window.
Please reply if that helped you :-)

Memory leak with jsp and beans

The application we have created has one particular page that is designed to stay up in the browser and refresh with new information from database queries once every 60 seconds. Running with Tomcat3.2.1 and IE5.5
The problem is that the memory usage of java.exe continues to grow until the machine crashes from out of memory. It does take more than 24 hours to crash.
Things I have tried to do to track down the problem or eliminate the problem.
- I have explicitly set the scope of the beans to "page"
- I have watched the DatabaseAccess.class (the beans are all extended from this class) and put in code to watch how many instantiations of the class are made and subsequently garbage collected. This appears to be where the memory leak may reside - hundreds of instantiations from some other source than the page I am displaying.
- the top frame makes database queries for security and display of a menu system dependant upon security clearance. It does not set any time for refresh (refresh == 0). Nor does it explicitly set a scope for the beans.
- I have run a different jsp engine to see if this was directly related to Tomcat - same problem with resin2.0.0
The main jsp page that is in the bottom section of the page has the following code:
** only the relevant lines are included here
<%@ include file="../../common.jsp" %>
<%
refresh=60;
%>
<head>
<%@ include file="../../meta_head.jsp" %>
</head>
<body bgcolor="#FFFFFF" text="#003399" link="#660099" vlink="#990099" alink="#006666" leftmargin="0" topmargin="0" marginwidth="0" marginheight="0">
<%@ include file="../../access.jsp" %>
<%@ include file="../../page_title.jsp" %>
<jsp:useBean id="Line" class="jsp.Line" scope="page" />
<jsp:useBean id="Machine" class="jsp.Machine" scope="page"/>
<jsp:useBean id="Alarm_log" class="jsp.Alarm_log" scope="page"/>
contents of meta_head.jsp
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<META HTTP-EQUIV= "expires" content = "0">
<META HTTP-EQUIV="Pragma" CONTENT="no_cache">
<META HTTP-EQUIV="Cache-Control" CONTENT="no-cache" forua="true">
<META NAME="robots" content="NOINDEX,NOFOLLOW">
<%
if (refresh > 0)
%>
<meta http-equiv="Refresh" content="<%= refresh %>">
<%
If anyone has some suggestions on how to trap this memory leak, it would be terrific. Or, some other things to try to stop the instantiation of the DatabaseAccess object (perhaps setting the scope of the beans in the header to "session" or "application"?).
Thanks in advance.
Roberta

jsp:useBean tags scope declaration :
page = Create a new instance on each load.
session = Load instance from the session, if not there, create one
application = Load instance from the ServletContext, if not there, create one.
Not sure how you are populating the data variables, but make sure you are closing all ResultSet, (Prepared)Statement, and Connection objects.

JRC and JSP memory leak...

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