Function typeid(object) leaks memory.

Run the following code and watch the memory usage grows:
#include <typeinfo.h>
class CC
public:
CC() { }
int main(int argc, char* argv[])
CC obj;
for(;;)
const char* pp = typeid(obj).name();
return 0;
$ CC -V
CC: Sun WorkShop 6 update 2 C++ 5.3 Patch 111685-05 2002/02/03
$ uname -a
SunOS udevaf047 5.8 Generic_108528-09 sun4u sparc SUNW,Ultra-80

The newest libC patch (released two days ago) is supposed to addres this:
http://access1.sun.com/patch.public/cgi-bin/readme2html.cgi?patch=108434&type=pub

Similar Messages

Distributed objects leak memory

When passing this C struct
NSString* nickname;
unsigned age;
} ConnectInfo;
to this method of distributed object
- (oneway void)connect:(in ConnectInfo*)ci
nickname = \[ci->nickname retain]; // or copy - doesn't matter
the NSString is reported leaked by `leaks` tool. There are as many strings leaked as many calls I did. Memory dump shows exactly this string object's contents. Allocation stack trace points inside NSInvocation/_NSWalkData, not into my code.
Distributed object is running in separate Cocoa thread in same process. Both threads has auto-release pool established, and there's no warnings in log regarding autoreleasing. SDK is 10.4u, OS is 10.5.4, my platform is PowerPC.
I tried all combinations of oneway, two-way, in, inout, bycopy, byref, retaining, copying, passing pointer, or reference (ConnectInfo&) to string - every time the string is leaked. If there are more strings in struct, they are also leaked. The only working method is to cast pointer to integer value, but this is a kind of hack.
DO runtime is obviously doing a deep copy of plain C struct, and somehow forgets to release Obj-C objects it copied. Is this a DO bug, or am I doing something wrong?

kasym wrote:
DO runtime is obviously doing a deep copy of plain C struct, and somehow forgets to release Obj-C objects it copied.
No, it isn't. It is doing a bitwise copy. It doesn't "forget" to release the Objective C object. That object is inside a C struct. Nothing happens automatically in C.
Is this a DO bug, or am I doing something wrong?
You are doing something wrong. When working in Cocoa, especially things like Distributed Objects, stick to Cocoa. Use an NSDictionary instead.

How to avoid the case of leaks memory in Object Oriented Programming

Hi, Everyone, I am writing a simple web-baed application for JSP and Servlet, I pass all data from JSP to Servlet, It is due to the number of row of record are variable, so I should write a Java Instance class to stored to specific data in a Java Object, and then stored those object in a arraylist In the Servlet class, and then pass the arraylist in to a session, to pass the session from the servlet to another JSP......
But some thing I am worried about is that if the no of row of record user input is large, then the number of object stored in the arraylist will also large. I am worried it will serious leaks memoary in my server. Because my server always occurs "Out Of Memoary Exception" in Tomcat, So If I use the above method. I affarid the memory will be further leaking in my server. So What can I do? Is it having any better method to prevent memory leaking when using Object Oriented Programming(Except using Hibernate)?
Can Anyone be help me?
Thank you very much for All, THX

Because many people say that the large amount of
using Object will lead to "memory leak", I am worried
about the size of object I use is too large and then
it will construct "memory leak". No it will not! You get a 'memory leak' by holding references to objects you no longer require.
>
The detail of my case is that:
In my web application, there is a session variable
pass through from one servlet to another jsp/servlet.You should only place small amounts of data in the session. If you need forward from a Servlet to a JSP (or JSP to Servlet) then you should place the data object in the request (using the setAttribute() method), not in the session. In this way, when the session is re-claimed so will be the data object.
And this session variable is stored a Instance Object
(which is a class write by me) with the following
issue:
1) This instance object having "has-a relationship"
with another four instance object (all are the
classes write by me)
2) This instance object having "has relationship"
with a arraylist, this arraylist is stored about 4-5
instance object(all are the classes write by me) .
If this object having the above issue, Will this
object construct a "leaks memory" when this object
stored in the session and pass through servlet to
another jsp/servlet?
Message was edited by:
sabre150

DS 5.1sp2 SLAPI plugins leak memory

I am running DS 5.1sp2, on Solaris 9/SPARC, and have been encountering problems with the ns-slapd process leaking memory when using SLAPI plugins.
We have written our own bind pre-operation plugin function which, when enabled, causes ns-slapd to leak memory at a pretty rapid rate. I have a simple test where I perform a simple ldapsearch in an endless loop. The ns-slapd process starts off with a VSS of ~617MB (we have a fair amount of cache enabled) ; after a few minutes of my test, the VSS grows by several MB. With the plugin disabled, I can run the same test for hours with no growth in the VSS of ns-slapd.
I have also performed this test with my plugin disabled, and the "testbind" plugin function (the one provided in <server root></server>/plugins/slapd/slapi/examples/testbind.c) enabled. I see even more rapid memory leakage than with my plugin.
Are there known issues with SLAPI memory management? Is there anything I can do other than restarting ns-slapd on a regular basis (in production, this memory leak causes VSS growth of several hundred MB in the course of a few days).

I think if you want to modify the result before it is returned, your plugin needs to be invoked post-op as well. Your plugin can be both at the same time, just make sure your init function knows what to do when called a second time.
Moreover, without looking at the stack trace, it is hard to make any progress. Do you still have the core file? Can you paste the pstack and pflags output ?
# Run "file" on the core to see if its a 32 or 64 bit core
# cd /path/to/ns-slapd
# pstack <corefile>
# pflags corefile
Alternatively, see if you can reproduce the problem with a small plugin. Smaller the better. I'll give it a go.

GetOracleDecimal seems to leak memory?

Hello, I am using the C# statement below to retrieve a decimal value from an OracleDataReader, adjust the precision, then assign it to a .NET decimal type:
decimal volume = (decimal)OracleDecimal.SetPrecision(reader.GetOracleDecimal(5), 28);
Over time, the service that hosts this method leaks memory. After some investigation, I found that "Oracle.DataAccess.Types.OpoDecCtx" types were collecting in the finalize queue. Any ideas on how to resolve this? I can't explicitly Dispose() an OracleDecimal...
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.

How to redefine GOS toolbar function "SEND OBJECT WITH NOTE" for deliveries

Hello Abapers,
for inbound and outbound deliveries (tcodes VL01N, VL02N, VL03N, VL31N, VL32N, VL33N) I have to replace the GOS toolbar function SEND OBJECT WITH NOTE with a redefined function matching the following specifications:
- Title field needs a different content
- Text (note content) should be filled by default, maybe with standard text, but can be overwritten
- All attachments in the attachment list of the object should be included by default or be selectable thru an additional button
Also possible could be an addiitonal toolbar function SEND ATTACHMENTS WITH NOTE as a copy of SEND OBJECT WITH NOTE.
Although I checked the SDN forums for a matching solution, I couldn't find one in tons of GOS threads.
Perhaps someone had solved a similar problem to send obejct with notes from GOS toolbar with several of the object's attachments.
Maybe some GOS classes have to be redefined for that, but this should only be available for deliveries, not for the other BOR types.
I'm waiting for your ideas.
Best regards,
Klaus
Edited by: Klaus Babl on Feb 16, 2012 10:13 AM

No the list of steps done to solve the issue:
1. Copy of class CL_GOS_SRV_SEND_OBJECT to new class /SIE/IS_BSD_GOS_SRV_SEND_ATT.
2. SM30 for table SGOSATTR: New entry for new service ZSO_SENDATT for the new class.
3. Copy of methods ON_SERVICE_SUCCEEDED, CHECK_STATUS, CREATE_ROOT_ITEM and ON_LINK_CREATED from class CL_GOS_SRV_ATTACHMENT_LIST to the new class.
4. New code added to the top of method CHECK_STATUS to show the service for deliveries only:
IF is_lporb-typeid NE 'BUS2015'
AND is_lporb-typeid NE 'LIKP'.
    ep_status = mp_status_invisible.
    EXIT.
ENDIF.
5. Copy of function group SAPLSGOS_OUTBOX and function module SGOS_SEND_OBJECT_WITH_NOTE to own copies.
6. Before calling cl_bcs=>short_message there are several steps to do:
- CALL METHOD cl_binary_relation=>read_links
- CALL FUNCTION 'SO_DOCUMENT_READ_API1' for all links
- cl_document_bcs=>create_document for all those documents (we are using types ATTA, NOTE and URL)
- APPEND those created documents to the attachment table and pass it to i_attachments of cl_bcs=>short_message
Solved issue!
COMMENT: This SDN wiki document is outdated and doesn't work any more:
http://wiki.sdn.sap.com/wiki/display/Snippets/ABAP-SendingGOSattachmentstoanemailaddress
Best regards,
Klaus

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

Applet using JVM 1.5.0_06 causes GDI Object Leaks

Hi,
Since the release of 1.5.0_06 our applet has developed a GDI Object leak. Basically, our applet draws on a panel when ever an update is available. The previous versions of the JVM seem fine and th e GDI Objects are stable, but this new version eats the GDIs up really quickly, and never releases them.
The problem occurs when the applet repaints itself. Calling repaint() or paint() from code works ok with no leaks but as soon as the applet is forced to repaint because of a resize, or because another window has moved over it the GDIs go up by multiples of 10.
Here is some sample code:
import java.awt.*;
import java.applet.*;
import java.util.Date;
* Copyright: Copyright (c) 2005
* Company: 
* @author not attributable
* @version 1.0
public class GDIApplet extends Applet {
 //Construct the applet
 public GDIApplet() {
 //Initialize the applet
 public void init() {
 try {
 jbInit();
 } catch (Exception e) {
 e.printStackTrace();
 //Component initialization
 private void jbInit() throws Exception {
 this.setLayout(new BorderLayout());
 this.add(new GDIPanel(), BorderLayout.CENTER);
 public class GDIPanel extends Panel implements Runnable{
 public GDIPanel() {
 Thread t = new Thread(this,"SPGPaintTimer");
 t.start();
 public void paint(Graphics g){
 if( g == null){
 return;
 System.out.println("Paint on thread: " + Thread.currentThread().getName());
 Date d = new Date();
 Rectangle bounds = getBounds();
 g.setColor(Color.black);
 g.fillRect(0,0, bounds.width, bounds.height);
 FontMetrics fm = g.getFontMetrics();
 String val = d.toString();
 int width = fm.stringWidth(val);
 int height = fm.getHeight();
 int x = (bounds.width - width) /2;
 int y = (bounds.height/2) - height;
 g.setColor(Color.yellow);
 g.drawString(val,x,y);
 public void run(){
 while(true){
 try {
 Thread.sleep(1000);
 } catch (InterruptedException ex) {
 repaint();
}

Hi there.
I've found this page by googling.
I am not a Java developer, but am using a third party java applet on my web page for mapping.
Funnily enough, I've been trying to hunt down a memory leak thats occuring in IE (not any other browser).
It only occurs when the applet is physically visible on the page, and the user is using the Sun JVM (1.5.0_06). The GDI object count increases every time I mouseover a link in a tree.
This does not occur with the MS JVM.
Unfortunately I do not have access to the applet source code, but I'm wondering if its related to your problem.
Have you had any success on this?
Thanks.

SystemUIServer leaks memory, possibly related to spotlight

SystemUIServer leaks memory. Immediately after reboot it occupies about 8 to 9 MB (real) on my system. Climbing to more than 17MB after only 30 minutes. After 3 days, 20 hours of uptime total real memory consumption of the SystemUIServer process was 441MB. Upon researching the process I found this forum devoted to Spotlight and interaction with SystemUIServer. Testing, I found Spotlight was unresponsive, the tool would not pull down and it didn't respond to the keboard shortcut.
Killing SystemUIServer brings the process memory usage back down but it continues to climb as it runs. Spotlight became responsive.
System is fully patched and updated.
I also noticed after rebooting from update that iSync logs messages like the following in console.log:
2007-08-09 05:54:54.180 SyncServer[3857] A Sync Server is already running on this computer, exiting process.

I guess my question would be, does anyone know when Apple is going to fix either Spotlight or SystemUIServer so it doesn't leak/crash as seems to so common here in the discussion groups?
Probably need a bit more troubleshooting...
My uptime is now 3days 20 hours -odd coincidence.
SystemUIServer is using 10.96MB Real Mem.
So, I don't know if I would expect Apple to already believe that there is a problem needing to be fixed. Really, don't think anything in this forum can be considered "common." For a core function of the OS, the Spotlight forum is now one of the quietest of all the Tiger forums- only one that sees less action is UniversalAccess.
Anyway, I'm not sure why you're having a problem with memory leaks in SystemUIServer or with Spotlight, and I'm not enough of a developer to tell you how you could debug it. All I can say is that your situation is not the norm and that there is likely something specific to your situation that is causing it. The unresponsiveness of Spotlight may very well be a side effect of the memory leak which is being caused by something else on the menubar.

Imapd service "Leak Memory"

I already have Java Communications Suite 6 Working , but, I have a Leak Memory problems with imapd process.
I have the server with 30 imapd process, 30 mshttpd process, and 30 pop process running to balance the load of the users.
All work fine(the CPU is 100% idle, the RAM is 80% available=6GB) when I access via browser(Chrome,Firefox), too when I access it with the traditional clients IMAP (Outlook, ThunderBird,etc).
The problem is that if one user want to copy(not just view) locally all your emails to your laptops/pc, the imapd process eat more than 3GB(instead of 80MB) of RAM and the system is getting slower.
If the user cancel this process(copy via IMAP all your emails) the process dont freedom doesn't release the memory and the system getting slower.
Actually my solution is:
# kill -9 <PID_imapd>
Some times when I kill the process the problem going to other imapd process, so in this case the solution is:
/opt/sun/comms/messaging/sbin/stop-msg
/opt/sun/comms/messaging/sbin/start-msg
I think that this problem is a bug but I dont know what is the patch.
May you help me? Any idea?
My system is:
A X2100 with one socket AMD Opteron 2600Mhz, 8GB RAM, 2 x disks 750GB in mirror with Solaris Volume Manager, Soalris 10 HW 10/08.
Thanks.
Jaime

Jorth, maybe we are not well explained,
the normal operation of imapd process(one process) need no more that 200MB, when a user is linked to it.
Check my example:
================================================================================================================
PID USERNAME SIZE RSS STATE PRI NICE TIME CPU PROCESS/NLWP
874 root 610M 421M sleep 59 0 0:14:51 0.1% java/160
818 webservd 413M 285M sleep 59 0 0:16:43 0.3% webservd/95
607 root 326M 45M sleep 59 0 0:07:01 0.1% webservd/58
16719 mailsrv 283M 50M sleep 59 0 0:00:06 0.0% imapd/5
798 root 237M 37M sleep 59 0 0:04:04 0.1% ns-slapd/48
*16673 mailsrv 220M 97M sleep 59 0 0:00:06 0.0% imapd/6*
*16677 mailsrv 210M 42M sleep 59 0 0:00:05 0.0% imapd/5*
*16696 mailsrv 205M 36M sleep 59 0 0:00:04 0.0% imapd/5*
*16695 mailsrv 200M 38M sleep 59 0 0:00:04 0.0% imapd/6*
*16685 mailsrv 197M 38M sleep 59 0 0:00:08 0.0% imapd/5*
*16682 mailsrv 195M 40M sleep 59 0 0:00:04 0.0% imapd/5*
*16681 mailsrv 193M 46M sleep 59 0 0:00:04 0.0% imapd/5*
*16690 mailsrv 187M 52M sleep 59 0 0:00:03 0.1% imapd/6*
*16687 mailsrv 187M 40M sleep 59 0 0:00:05 0.0% imapd/5*
*902 icsuser 185M 24M sleep 59 0 0:00:05 0.0% cshttpd/2*
NPROC USERNAME SWAP RSS MEMORY TIME CPU
78 mailsrv 2439M 2329M 28% 0:11:53 0.5%
14 icsuser 1064M 233M 2.8% 0:06:55 0.0%
136 root 965M 727M 8.9% 2:15:20 50%
1 webservd 264M 326M 4.0% 0:16:43 0.3%
1 noaccess 90M 100M 1.2% 0:01:13 0.0%
Total: 237 processes, 1042 lwps, load averages: 1.91, 1.90, 1.89
================================================================================================================
When we run an aplication like OutLook to copy locally to the laptopn all the mail via IMAP, "ONE imapd process" eat more memory that need it and never released.
Example:
================================================================================================================
PID USERNAME SIZE RSS STATE PRI NICE TIME CPU PROCESS/NLWP
*16673 mailsrv 2856M 2534M sleep 59 0 0:00:06 45% imapd/6* <---------------this process eat memory and slow the system(CPU/RAM)
874 root 610M 421M sleep 59 0 0:14:51 0.1% java/160
818 webservd 413M 285M sleep 59 0 0:16:43 0.3% webservd/95
607 root 326M 45M sleep 59 0 0:07:01 0.1% webservd/58
16719 mailsrv 283M 50M sleep 59 0 0:00:06 0.0% imapd/5
798 root 237M 37M sleep 59 0 0:04:04 0.1% ns-slapd/48
*16677 mailsrv 210M 42M sleep 59 0 0:00:05 0.0% imapd/5*
*16696 mailsrv 205M 36M sleep 59 0 0:00:04 0.0% imapd/5*
*16695 mailsrv 200M 38M sleep 59 0 0:00:04 0.0% imapd/6*
*16685 mailsrv 197M 38M sleep 59 0 0:00:08 0.0% imapd/5*
*16682 mailsrv 195M 40M sleep 59 0 0:00:04 0.0% imapd/5*
*16681 mailsrv 193M 46M sleep 59 0 0:00:04 0.0% imapd/5*
*16690 mailsrv 187M 52M sleep 59 0 0:00:03 0.1% imapd/6*
*16687 mailsrv 187M 40M sleep 59 0 0:00:05 0.0% imapd/5*
*902 icsuser 185M 24M sleep 59 0 0:00:05 0.0% cshttpd/2*
NPROC USERNAME SWAP RSS MEMORY TIME CPU
78 mailsrv 2439M 2329M 80% 0:00:5 0.5%
78 mailsrv 2439M 2329M 10% 0:11:53 0.5%
14 icsuser 1064M 233M 2.8% 0:06:55 0.0%
136 root 965M 727M 8.9% 2:15:20 50%
1 webservd 264M 326M 4.0% 0:16:43 0.3%
Total: 237 processes, 1042 lwps, load averages: 1.91, 1.90, 1.89
===================================================================================================
The rest of the imapd process(29) in this moment just load 40-50MB(when those are free).
If we kill the process 16673 the user connect to the next imapd process and the problem persist whit the same patology: eat memory and CPU, and slow the system.
So, we think that is not normal and maybe we need patch the system to solve the problem.
We will to test the 64Bit version in this moment and we will post the results.
Thank
Jaime

Reading Lots of Objects into Memory

I need to read thousands of fairly large objects from an object database to the point that the JMV memory runs out.
A solution is to: read, use and discard as opposed to loading all the objects into memory at once -pretty simple but I want to do it right. I have a general idea on how to implement the approach but I need your help in locating some reading materials, code snipplets and/or best practices.
Thanks!

If you're using thousands of objects you might look into the Flyweight Pattern (depending on what these objects are and what state they have). You might also look into increasing the amount of memory available to the JVM via that -Xms switch.
Aside from that, if you reuse the same reference name (variable name)(s) you'll allow the Garbage Collector to recover that memory.
Good Luck
Lee

Compare system state (number and types of objects in memory)

We have 2 exactly identical servers running our application talking to the same database.
When some obejct from server 1 is deleted, a message is passed to server 2 to delete the object from its cache too.
Forget the database, I want to design a testing system which compares the system-state (number and type of live-objects) in memory for server 1 and server 2 after the operation and the message, and reports any discrepancy.
Any ideas ?

Are you trying to debug a distributed cache implementation?
If you want to inspect the state of your application on multiple servers creating a JMX bean might be a solution.
http://java.sun.com/developer/technicalArticles/J2SE/jmx.html

Problem in getting the function template object from the repository.

Hi all,
I have created a par file. I have a JCO connection in that. I am facing problems in getting the function template object from the repository. This thing is running successfully when i try to deploy it in Tomcat. But i am facing problems when i try to deploy it in SAP EP 6.0.
Below is statement which is giving error after being deployed to SAP EP6.
This is executing fine when executed in Tomcat Server.
// getting the object of function template
IFunctionTemplate functionTemplate =
aRepository.getFunctionTemplate("YADDNEWUSER");
Note : YADDNEWUSER is the name of the RFC which I am calling from my JAVA Code.
Thanks in advance,
Divija

This sounds like a bug in the smart upload code. I have used this stuff before, but it's probably an older version, so maybe they broke something. Enumerations aren't usually guaranteed to keep things in any particular order. I would say for now, make a method to take the enumeration and a param name to find the value. And write to the JSPSmart people.

How to remove the Object from memory.

Hello.
Flash file that i made with Flex Builder uses memory too
much.
Look at the next example source code.
var testCan:Canvas = new Canvas();
this.addChild(testCan);
this.removeChild(testCan);
testCan = null;
but just memory usage still goes up, is not freed instantly.
so if i load the large flash files on my web browser,
after 5 munites or something, the web browser is down.
How to remove the object from memory immediately without
delay?

It's all about the Garbage Collector ..
There is a nice write up here :
http://www.gskinner.com/blog/archives/2006/06/as3_resource_ma.html

Function typeid(object) leaks memory.

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