Maximize server uptime - memory leak?

Since we stabilized the newly introduced WLI 8.1 application we are now fine tuning the JVM. We are facing some kind of memory leak which forces us to reboot the WLS instances daily.
I'm now asked to identify some strategies how we could let the WLI instances run for longer than 1 day. My goal is 7 days, so that the machines must only be touched once a week. The relevant JVM settings are like this:
-Xms2048m -Xmx2048m -Xmanagement -Djrockit.managementserver.port=30011 -XgcPrio:throughput
I've choosen the "throughput" strategy as we have here a systems which acts asynchronously most of the time (WLI). I have attached two JRA records. The first ("1day") shows a system which has an uptime of now 16 hours. The heap utilization is almost all the time between 90%-100%. Things get worse after a while. In the consequence we are rebooting the server when we see more and more timeout-exceptions in our WLI layer and heavy GC activity ("average time spent in GC")
The other record ("leakdetector") shows a system which is now running for almost 3 hours. Here I connected the memory leak detector. The graph looks a bit better / more balanced. Means, that after 3 hours the avg heap util remains between the margins of 40-50 %. The trend of the bottom margin however clearly indicates an increasing memory footprint.
To understand this in more detail I started using the memory leak analyzer. So far I got no benefit from using the tool, though it looks very impressive. However, when I connect the memory leak analyzer I can observe some strange heap graph changes. I suppose the memory leak detector has some impact onto the GC strategies, doesn't it? My heap graph looks totally different with no leak detector attached. What can be the reason on this?
Also I'm quite a bit confused why the "Growth" indicator always stays at 0 bytes/sec, even when I can see that objects are getting bigger and bigger. What is the secret here?
i appreciate every comment you have on my case,
thanks a lot

You might also look at approaching the problem for a different perspective. Which transactions, requests, components are creating the most amount of memory? What concurrent requests where active when the memory jumped or an OOME was thrown. I have found this approach effective in getting a good idea on where to focus memory diagnostics after ruling of course a resource capacity issue.
The following article discusses the difference between a leak and a capacity problem.
http://www.jinspired.com/products/jxinsight/outofmemoryexceptions.html
Also you should try high level monitoring to see whether there are global patterns in metric data that provides clues. This blog entry shows what is possible with professional performance management tools with visualizations going beyond pie charts and table views.
Beautiful Evidence: Metric Monitoring
http://blog.jinspired.com/?p=33
There are also many low level memory inspection tools on the market that might help quickly navigate the heap and identify the problem though I think the JRA tool has probably most of the same features.
Regards,
William Louth
JXInsight Product Architect
CTO, JInspired
"Java EE tuning, testing, tracing, and monitoring with JXInsight"
http://www.jinspired.com

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SQL Server 2012- Memory Leak Issue

Team,
We are running a Mission Critical Application on SQL Server 2012 SP2(11.0.5058) which is configured on Always ON Synchronous mode. Offlate due to heavy development work, Application team have come up with stating memory issues. I have analysed all the areas
and everything looks normal. Please suggest if we have to patch the latest CU4 for SQL Server 2012 SP2.
The checks were performed on the below areas:
- Errorlog, System Logs - No errors reported.
- There are close to 8 Databases hosted on the instances which are all configured for AlwaysON. SQL Server is running on VM Infrastructure and the total physical memory allocated is 96GB out of which SQL is capped for 92GB.
-The Page Life Expectancy is healthy and is showing a greater number. There are no Signal waits either or pending memory grants.
- The writes are more than reads for one of the databases which is flagged with application team. There are no blockings & Deadlocks.
Please suggest me the future course of action and your inputs are much appreciated.
Best Regards,
Sharath

Actual issue is- Application team have reported a memory leak and their builds have significantly slowed down. They suspect that its Database memory leak. However I have verified from database end and gave the above inputs.
The AOAGs are good. I was looking for any pointers whether there are any bugs which is related to memory leaks in SQL Server 2012. I know all of them are addressed with SQL Server 2012 SP2.
Application team has NO idea about SQL Server do they ? And to say SQL Server has memory leak you have to actually prove it did they showed any proof. Its common for application team to say SQL Server is leaking memory because they are unaware about fact
by default SQL Server would take as much memory as possible and would release when SQLOS asks it to do so. This might give sign that it is leaking memory BUT IT IS NOT.
As you already said AOAG is working fine so I am presuming there is nothing much to worry. To monitor memory usage in SQL Server 2012 you can use below counters
SQL Server: Memory Manager-- Target Server Memory (KB)
SQL Server: Memory Manager--Total Server Memory (KB)
SQL Server: Memory Manager- Free Memory (KB)
SQL Server: Memory Manager--Database Cache Memory (KB)
Please mark this reply as answer if it solved your issue or vote as helpful if it helped so that other forum members can benefit from it
My Technet Wiki Article
MVP

Java jvm server mode memory leak out of memory crash

Hi,
I am using java version "1.6.0_13" on a windows 2003 server.
I am running apache-tomcat-6.0.18 PermSize:256M HEAP:1G
If tomcat is started with java with client mode vm, the site works very well!
Requests are processed without problems and memory heap will stabilize on 500M.
I like to use the server mode. If I start the tomcat with server mode, then
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increase more than the 500M about the 1G and then the tomcat process crash.
Questions:
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this problem may arise if u r using a windows 95 series of OS. after starting the dos window, go to that windows properties and increase the memory allocations to maximum, dont let it be at auto. I think this should help u

CS 5.5 Dynamic Link Server Massive Memory Leak - 16 GB of unusable RAM on a 32 GB Machine

Hi,
I do work in AE then save the Project and drag n drop the comp I want to render into Adobe Media Encoder.
After doing that with a couple of project things start to behave weirdly...
Juddery Playback & In-responsiveness.
I use "MenuMeters" to always track my memory....
Normally when I boot up I will see a miniature green slice of a full wheel(See Pic Below) being used meaning that I have about 31GB of my RAM to play around with.
That changes after running above scenario and adobe apps in general...
What happens is that after Purging ALL in After Effects it will purge the RAM that it currently uses BUT it will set that used-to-be-allocated RAM as Inactive and NOTHING that I do can take care of that. Logout wont help. Restart is the only remedy.
So this below screenshot depicts what happens right after I choose PURGE ALL in AE
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If you dont have - MenuMeters, you can follow along with Activity monitor - which will yield the exact same result !

I figured it out. It was the event log files in `%SystemRoot%\System32\Winevt\Logs`. This particular server did not have the standard "overwrite events as needed" as all of the other servers did. The log files, however, were not
being pruned so they kept stacking up.
This explains exactly why over a weekend period there would be hardly any change in the free space file size.
The `WinDirStat` software showed this space as "Unknown" space despite "running as Administrator" and I did start to notice the trend of "Unknown" space increasing as I started to track the `WinDirState` screenshots twice a day.
What eventually led me to the log files was using [Disk Space Fan][1] and comparing the reported sizes. As you can see, the Windows folder on `WinDirStat` shows 24.6 GB while `Disk Space Fan` shows 116 GB. Drilling down further into Windows\System32
and looking at the "Top List" shown in Disk Space Fan I noticed that WinDirStat did not have the `winevt` folder and that it showed 89.7 GB of space usage.
The local administrator group, which has the Domain Admins added to it, had full control over the folder so understanding why WinDirStat did not pick up these folders is beyond me.

How to configure license file for Memory Leak tool and WL Server 9.2?

(I posted to general JRockit forum before realizing existence of this forum which is probably more applicable.)
Here's our problem:
Running latest version of WL 9.2 MP3 and JRockit Mission Control 3.0.1
Able to run Mission Control, and connect to the WL Server and to run View Console with no problems.
I can't get Memory Leak tool to run because it complains about needing a license file.
First I tried with off the shelf WL 9.2 MP3.
Get error:
A license for Memory Leak Detector could not be found on the JRockit at (1.5) weblogic.Server (192).
Error: Can not find component Memory Leak Detector for JRockit * in the license file. Please check http://www.jrockit.com/license for license updates.
So I downloaded license file from JRockit download site - wls92.zip. It contains several files, but no clear instructions on what to do with these files. I copied one of these files "LIC-WLSP92.txt" to my JRockit home as C:\bea\JROCKI~1\jre\license.bea
Tried again. Restarted WL server. Restarted JRockit Mission Control.
Get error: A license for Memory Leak Detector could not be found on the JRockit at (1.5) weblogic.Server (3052).
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Any advise on how to install license or who to contact for help?

Installed Mission Control 3.0.3.
Got following message when I attempted to run Memory Leak:
A license for Memory Leak Detector could not be found on the JRockit at (1.5) weblogic.Server (192).
Error: Can not find component Memory Leak Detector for JRockit * in the license file.
Please check http://www.jrockit.com/license for license updates.
I believe that we're using the latest downloads of WebLogic 9.2.x and JRockit.
WebLogic is running using 9.2.3 and JRockit build R27.4.0-90_CR358515-94243-1.5.0_12-20080118-1154-windows-ia2
Contents of C:\bea\jrockit_150_12\jre\license.bea:
<?xml version="1.0" encoding="ISO-8859-1"?>
<bea-licenses>
<license-group format="1.0" product="JRockit" release="*">
</license-group>
</bea-licenses>
Could WebLogic be misconfigured?
Any diagnostics to help figure out the licensing?
Any other ideas?

Memory Leak in Java Server

Howdy Folks- I wrote a server monitor in java, which I was expecting to run for months at a time without restarting. Apparently there is some slow memory leak which results in an OutOfMemoryError after a few weeks. It's in a production system, so I can't readily add debug statements to the code, and the OutOfMemoryError apparently screwed up the logging, so I didn't get a stack trace in my logs, just an "OutOfMemoryError" went to standard out.
I'm assuming the problem lies in the code, specifically probably some discarded reference that is not being properly garbage collected? I am using a few different ArrayLists to store some historical information, and I call clear() on these frequently. Is there any known issue with ArrayList or HashMap that the "clear()" method doesn't result in garbage collection of the objects that were in it? I am also doing a "remove(int)" sometimes as well. Any chance the objects cleared or removed would not be garbage collected?
thanks
Bleu

Howdy Folks- I wrote a server monitor in java, which I
was expecting to run for months at a time without
restarting. Apparently there is some slow memory leak
which results in an OutOfMemoryError after a few
weeks. It's in a production system, so I can't
readily add debug statements to the code, and the
OutOfMemoryError apparently screwed up the logging, so
I didn't get a stack trace in my logs, just an
"OutOfMemoryError" went to standard out.Are you even attempting to catch Errors? Catching Exceptions will not help with this. It should print the stack trace. When it OOMs it doesn't mess up what's already allocated, it just can't allocate more.
I'm assuming the problem lies in the code,
specifically probably some discarded reference that is
not being properly garbage collected? Most likely, there are references that are never being cleared in your code. Without seeing the code or at least having a better description, I don't think anyone here can help you. Can you set up a test senario and use an Optimizer to see what's going on?
I am using a
few different ArrayLists to store some historical
information, and I call clear() on these frequently.
Is there any known issue with ArrayList or HashMap
that the "clear()" method doesn't result in garbage
collection of the objects that were in it? Not that I know of, no. I doubt that is the problem.

Memory leak in NFS server

Hi all,
I have a problem with 2 SunFire 240 (4Gb of Ram) with solaris 10 in a Veritas Cluster.
These nodes are 2 NFS server and they have 10 nfs client.
We have a memory leak on these servers. The memory utilization increase day by day.
The memory seems to be allocated by the kernel and not from some process.
So I would like to know if this is a common issue (NFS?) or this is a single case.
Thanks in advance for you help
Regards
Daniele
Edited by: Danx on Jan 2, 2008 5:23 PM

That message relates to how the application deals with its threads, which for a the most part isn't actually an issue. However, since it does have the potential to cause a leak under certain circumstances we did make a change in 10.3 to address that issue, so I suggest you upgrade to that release.

Memory leak issue with link server between SQL Server 2012 and Oracle

Hi,
We are trying to use the linked server feature with SQL Server 2012 to connect SQL server and Oracle database. We are concerned about the existing memory leak issue. For more context please refer to the link.
http://blogs.msdn.com/b/psssql/archive/2009/09/22/if-you-use-linked-server-queries-you-need-to-read-this.aspx
The above link talks about the issues with SQL Server versions 2005 and 2008, not sure if this is still the case in 2012. I could not find any article that talks about if this issue was fixed by Microsoft in later version.
We know that SQL Server process crashes because of the third-party linked server provider which is loaded inside SQL Server process. If the third-party linked server provider is enabled together with the
Allow inprocess option, the SQL Server process crashes when this third-party linked server experiences internal problems.
We wanted to know if this fixed in SQL Server 2012 ?

So your question is more of a information type or are you really facing OOM issue.
There can be two things for OOM
1. There is bug in SQL Server which is causing the issue which might be fixed in 2012
2. The Linked server provider used to connect to Oracle is not upto date and some patch is missing or more recent version is to be used. Did you made sure that you are using latest version.
What is Oracle version you are trying to connect(9i,10g, R2...)
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What is the best way to deal with memory leak issue in sql server 2008 R2

What is the best way to deal with memory leak issue in sql server 2008 R2.

What is the best way to deal with memory leak issue in sql server 2008 R2.
I have heard of memory leak in OS that too because of some external application or rouge drivers SQL server 2008 R2 if patched to latest SP and CU ( may be if required) does not leaks memory.
Are you in opinion that since SQL is taking lot of memory and then not releasing it is a memory leak.If so this is not a memory leak but default behavior .You need to set proper value for max server memory in sp_configure to limit buffer pool usage.However
sql can take more memory from outside buffer pool if linked server ,CLR,extended stored procs XML are heavily utilized
Any specific issue you are facing
Please mark this reply as the answer or vote as helpful, as appropriate, to make it useful for other readers

Memory Leak Problem at Adobe LiveCycle Server 9.0

Hi All,
We want to upgrade our system to 9.0. During the performance test we have found memory Leak problem at ALS 9.0. I explain the detailed problematic issue below. Is there any body who has any suggest?
We have Adobe Livecycle ES2 9.0 SP2 installed on WAS 6.1. But also WAS on Windows Server 2008 R2. We call java web services from .Net Web service for generating PDFs.
On Java side “com/adobe/internal/pdftoolkit/services/javascript/GibsonMemoryTracking” class is causing Memory Leak problem at server.
Our .Net Codes. I copied below. First we generate PDF then we convert this pdf to static pdf.
First We call the GeneratePDF function.
public static bool GeneratePdf(Document document, byte[] pdfTemplate)
        try
            //Create a FormDataIntegrationService object and set authentication values
            FormDataIntegrationService formDataIntegrationClient = new FormDataIntegrationService();
            formDataIntegrationClient.Credentials = new System.Net.NetworkCredential(Settings.ALCUserName, Settings.ALCPassword);
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            ALCFormDataIntegrationService.BLOB inXMLData = new ALCFormDataIntegrationService.BLOB();
            //Populate the BLOB object
            inXMLData.binaryData = System.Text.Encoding.UTF8.GetBytes(document.XmlData);
            //Create a BLOB that represents the input PDF form
            ALCFormDataIntegrationService.BLOB inPDFForm = new ALCFormDataIntegrationService.BLOB();
            inPDFForm.binaryData = pdfTemplate;
            //Import data into the PDF form
            ALCFormDataIntegrationService.BLOB results = formDataIntegrationClient.importData(inPDFForm, inXMLData);
            document.PdfData = results.binaryData;
            Utility.Log("GeneratePdf", "Pdf generated successfully.", LogLevel.Info);
            return true;
        catch (Exception ex)
            document.ReturnCode = "22";
            document.ReturnMsg = "Exception on generating the pdf";
            Utility.Log("GeneratePdf", "Exception: " + ex.Message, LogLevel.Error);
            return false;
Then We call the ConvertPDF function.
public static bool ConvertPdf(Document document)
        try
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            inData.binaryData = document.PdfData;
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            RenderOptionsSpec renderOptions = new RenderOptionsSpec();
            renderOptions.cacheEnabled = true;
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        catch (Exception ex)
            document.ReturnCode = "22";
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Our System Configuration:
Expiry date: Never Version: 9.0.0.0,
GM Patch Version: SP2
Service Pack Version: unknown
ADOBE® LIVECYCLE® PDF Generator ES2
9.0.0.0
SP2
ADOBE® LIVECYCLE® Reader Extensions ES2
9.0.0.0
SP2
ADOBE® LIVECYCLE® Output ES2
9.0.0.0
SP2
We changed some configuration which is suggested by Adobe. But this change does not solve our problem.
Changed Configurations via ADMINUI
Memory Leak Problem which is viewed via wily tool:

Hi Mahir,
Can you attach the results of this performance test where we can see how GibsonMemoryTracking class is causing the memory leak issue.
Also do you see any stackTrace in the LiveCycle server logs related to memory / heap when you run this performance test ?
Thanks,
Simer

Memory leak on SunOne Web Server 6.1 on application reload

Hi!
I am pretty sure that i have found a memory management problem in
SunOne Web Server 6.1 .
It started with an OutOfMemory error we got under heavy load . After
some profiling with Jprofiler i didn't find any memory leaks in the
application.Even under heavy load (generated by myself) i can't find
anything ,more, i can't reproduce the error! The memory usage is
about 20Mb and does not go up .
However it is pretty simple to see the following behavior:
[1] Restart the server (to have a clear picture) and wait a little for
memory usage to stabilize.
[2] In the application dir. touch .reload or one of the classes:
The memory usage goes up by another 50Mb (huge amount of mem. taking
into account the fact that it used only 20Mb under any load befor).
Do this another time and another 20Mb gone etc..
The JProfiler marks the memory used by classes . And it can be
clearly seen the GC can't release most of it.
I AM sure this is not the application that takes all the memory.
Another hint : after making the server to reload application i can see
that the number of threads ON EVERY RELOAD is going up by ~10-20
threads .The # of threads goes lower over time but not the mem usage.
My system:
Sparc Solaris 9 ,Java 1.4.2_04-b05, Sun ONE Web Server 6.1SP5
Evgeny

my guess is that - because of '.reload' , web container tries to
recompile all the classes that you use within your web application and
hence the memory growth is spiking up.What do you mean by "tries to recompile"?The classes in
Web-inf are already compiled! And i have only ~5 jsp's .
(the most part of the applic. is a complicated business logic)
If you are talking about reloading them ,yes,that's the purpose of .reload,
isn't it? :).But it seems that container uses the memory for it's own
classes: the usage of memory for my classes don't really grow
that much (if at all) after reload (according to profiler)
Also the real problem is that the memory usage grows to much for
too long (neither seen it going down) and thus ends with OutOfMemory.
if you are seeing the memory growth to be flat in stress environment,
then I am not sure that why do you think that there is a memory leak ?There is no memory leak in stress environment.
There is memory leak while reloading the application.
It is a memory hog for sure (~20-30Mb for every reload).
Memory leak?It seems that way because i can't see memory usage go
down and after a lot of reloads OutOfMemory is thrown.
also, what is jvm heap that you use ? did you try jvm tune options like -
XX:+AggressiveHeap ?256Mb.I can set it bigger ,but how do i know that it will not just delay
the problem ?
Thanks for response.
Evgeny

Microsoft Jdbc driver for SQL Server memory leak

I'm using Microsoft Jdbc driver and see there's some leak after running application for a while. I'm sure that it's from Jdbc driver because I sitch to Jtds and the issue went away. My question is is there anybody knows which web sites talk about memory leak issue in Microsoft Jdbc driver for SQL Server?
Appreciate your help

I'm using Microsoft Jdbc driver and see there's some leak after running application for a while. I'm sure that it's from Jdbc driver because I sitch to Jtds and the issue went away. My question is is there anybody knows which web sites talk about memory leak issue in Microsoft Jdbc driver for SQL Server?
Appreciate your help

Memory leak issue in tuxedo server

Hi,
I am facing memory issues in our tuxedo application.One of the server memory utilization is gradually increasing after reboot. As a temporary solution , we are making restart of that particular server every week.
I have installed Valgrind tool.i am trying to call the service ( Around 800 services are part of application ) which i suspect causing memory leak through ud script. like below.
valgrind ud32 < servicename.ud
but it is not giving memory leak details in actual service instead it is giving details about ud.
Could you guys suggest how can we find memory leak in tuxedo services.
Thanks
Ramana

HI Sir,
Thanks a lot for your response.
I ran the comand as mentioned by you in your post. but i haven't shutdown the server bcoz it is prod environment.
It logged huge output to the log file.
Below is the summary of the logfile.
==00:00:00:05.383 23666== LEAK SUMMARY:
==00:00:00:05.383 23666== definitely lost: 7,105 bytes in 7 blocks
==00:00:00:05.383 23666== indirectly lost: 3,383 bytes in 18 blocks
==00:00:00:05.383 23666== possibly lost: 28,653 bytes in 9 blocks
==00:00:00:05.383 23666== still reachable: 529,286 bytes in 288 blocks
==00:00:00:05.383 23666== suppressed: 0 bytes in 0 blocks
==00:00:00:05.383 23666==
==00:00:00:05.383 23666== For counts of detected and suppressed errors, rerun with: -v
==00:00:00:05.383 23666== Use --track-origins=yes to see where uninitialised values come from
==00:00:00:05.383 23666== ERROR SUMMARY: 107 errors from 72 contexts (suppressed: 10 from 10)
But I am not able to understand the output logfile. Could you please let me know how can we analyze the logfile.
Thanks in advance.

Tuxedo Memory Leak Issue (Tuxedo 8.1 - Windows Server 2003)

Hi
We are running tuxedo 8.1, 32 bit with patch level 258 in our windows server 2003 based production environment. We are currently facing an issue where the memory usage of machine slowly keeps on going higher and higher eventually resulting in “Memory Allocation Failure” to tuxedo servers. We then have to do a complete restart of tuxedo which stabilizes the system for other few days.
We have been analyzing the our source code in development/test environment using different tools like a customized Alzheimer tool and IBM purify but both tools reported no memory leaks. We then developed a test tuxedo server exposing a tuxedo service which simply allocates a memory to a response buffer and then returns the response buffer. I then configured tuxedo queue with same name “MEMTEST3” and configured a TMQForward server to call this “MEMTEST3” service every time a message is en-queued to the MEMTEST3 queue.
unsigned long _LIBENTRY ulTPAlloc(FBFR32 **ppc, long size)
unsigned long ulRes = MSG_SUCCESS_c;
ppc = (FBFR32 ) tpalloc("FML32", (char *) 0, size);
if (*ppc == (FBFR32 *) 0) {
vLogMessage(hGetLogHandle(), MSG_MEM_ALLOC_ERR_c, (char *) 0, (Event_t *) 0,
BM_NOSUPPRESS_c, size);
ulRes = MSG_MEM_ALLOC_ERR_c;
return (ulRes);
/*==============================================================================
Service MEMTEST2
==============================================================================*/
void MEMTEST3(TPSVCINFO *pRequest)
FBFR32 *pFmlResponse = NULL;
FBFR32 *pFml = NULL;
unsigned long ulRes = MSG_SUCCESS_c;
unsigned long ulActionCode = 0;
int iExitValue = 0;
long lTpurcode = 0;
FBFR32 *pFmlNULL = NULL;
userlog("Starting MEMTEST3 service.");
if (pRequest == NULL || pRequest->data == NULL)
vLogMessage(hGetLogHandle(), MSG_API_ARGS_ERR_c, NULL, NULL, BM_NOSUPPRESS_c);
ulRes = MSG_API_ARGS_ERR_c;
else
pFml = (FBFR32 *) pRequest->data;
userlog("MEMTEST3: GET THE MEM");
ulRes = ulTPAlloc(&pFmlResponse, 1024);
userlog("Ending MEMTEST3 service.");
tpreturn( iExitValue, lTpurcode, ( char * ) pFmlResponse , 0L, 0L );
While I was en-queuing the messages to the queue, I kept on monitoring the memory usage of the server hosting the service. What I observed was that I saw an initial hike in the usage of memory of the server followed by small jumps in memory increase. I kept on monitoring the server for a long time and the memory was never returned. What I suspect is that there is memory leak in tuxedo TMQforward process as it never released the memory allocated in the service.
Can anyone help how this situation can be avoided ?
Kind Regards,
Asim

Hi Todd,
Also as well as my previous question, I also found your reply to another user posting something similar at Re: Memory leaks in Tuxedo libraries
You mention that:
In general Tuxedo will free anything it allocates, although there are cases where memory is allocated and not freed because:
+1) it is one time or a fixed number of times allocations that will not continue to grow, and freeing up the memory just before exiting isn't of any benefit.+
+2) the memory is under Tuxedo's memory management functions where we manage our own look aside lists to provide better buffer allocation performance and again freeing these before process termination is of little benefit.+
Our code does only issue TPALLOC once and then a TPRETURN - could point (1) of your comment above also be something of concern to us, where we would observe a continuous growth of memory usage?
I know it may sound like a stupid question but do we need to run our code 20,000 times before memory gets freed?
Kind Regards,
Asim

Memory leak when redirecting to a remote XFree86 server

Hi,
I'm running a Java application, which controlls our network equipment.
The application is written by our development team. It installs a graphical
user frontend in order to allow interoperation with the network administrators.
The application is run using the following environments:
* Windows NT 4.0
* Sun Solaris 8, local Xsun X11 server
* Sun Solaris 8, XFree86 X11 server located on a linux host
* Sun Solaris 8, CygWin/XFree86 X11 server running on a Windows NT host
It turns out, that the application runs fine, if the application and the GUI either
run both on a Windows NT host or the Sun workstation. However, if the application
is launched on a Sun workstation and the X display is redirected to any XFree86
X11 server, each change of the GUI focus - either forced by a mouse-click, or
an canvas being changed by the application itsself - consumes an amount of
3 MB of memory and never releases this again.
So I suppose any memory leak in the Swing/X11 interface ...
I've already searched SunSolve and installed all patches addressing memory leaks
in Solaris 8 and Xsun ...
Also our development team already has profiled the application using tools
like OptimizeIt without being able to locate any memory leak.
Has anyboday seen this before? Is there any bugfix/workaround available?
Thx in advance,
Jens Hamisch

We just noticed the same problem for our Swing Applet using JDK 1.4 on Solaris 8 displayed to any remote X server running on Windows 2000 or Linux. If we let the applet run long enough (the plot in the applet updated every second), we could easily use up 500-600 Mb. Again, on the local console on Solaris or Windows 2000 the memory was stable at around 70 Mb.

Maximize server uptime - memory leak?

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