Synchronization hangs intermittently

Hi,
The synchronization of a couple of Analysis Services databases hangs intermittently. They generally hang on Thursday which is when there is a relatively heavy load on the servers. However the servers are high spec so there is not a high load percentage usage
of resources on CPU / memory and disk IO. The databases being synced which hang are around 15Gb in size.
I am also not able to receive any error messages.
Any help would be greatly appreciated.
Kind Regards,
Kieran.
Kieran Patrick Wood http://www.innovativebusinessintelligence.com http://uk.linkedin.com/in/kieranpatrickwood http://kieranwood.wordpress.com/

Sorry that your New Year is getting off to such a bad start. Freezing can have many causes, and unfortunately the logic board can be one of them. Other possibilities may be a dying hard drive and software corruption.
Unfortunately, when I had logic board problems, it was definitely heat related. It would freeze after 15-20 minutes. If I set up a fan, it would go about twice that long.
Do you still have the original hard drive? If so, it may be getting long in the tooth. Here is a utility that you can download and run several times for free:
http://www.versiontracker.com/dyn/moreinfo/macosx/32454
This utility will give you more insight into the S.M.A.R.T. status of your hard drive than Disk Utility will.
What does the iBook do when booted from a disc? If it still slows and freezes, that would point to the logic board, as you are essentially bypassing the hard drive and the OS.
If you want to exert pressure on the logic board, here is an article that might help to apply it at the right point:
http://www.coreyarnold.org/ibook/
Finally, to eliminate all possibility of a software cause, you might want to try reinstalling the OS.
It would probably be prudent to back up all your data if you haven't already and keep it backed up. Until your iBook is diagnosed and fixed, there is always the danger that it could die at any time.
Sorry to not be able to be more encouraging.
Good luck!

Similar Messages

OSX hanging intermittently

I recently bought a new 13" MacBook Pro 2.53GHz, I haven't even had it a month yet. I'm having a problem where the OS will hang intermittently. Let me explain.
I first noticed the problem when playing videos back with quicktime. All of a sudden playback would seem to stop even though I hadn't pressed pause. If I tried to click anywhere the computer would become unresponsive and I would get the spinning beachball (though I could still move the mouse). After up to a minute playback would resume but skipped forward, as if it had remained playing during the hang.
This doesn't just happen with quicktime is running. I've noticed I seem to be "allowed" one more click before the system hangs. I've tried to use this to my advantage by bringing up Activity Monitor, but I can't see any unresponsive or out of control processes. I've also noticed that if something is playing in iTunes, it continues playing throughout the hang.
Finally, when the hang is over, the system seems to play catch up, carrying out all the commands and mouse clicks I made during the hang.
This happens a few times a day. Hangs last up to about a minute. It's incredibly frustrating and I'm not sure how to go about fixing the problem. I've run a hardware test from the OSX disc and everything seems to be fine. Any suggestions would be greatly appreciated.
Cheers

HI and Welcome to Apple Discussions...
Might be a good idea to boot from your install disk and check the hard drive just in case.
Insert the installer disk and Restart, holding down the "C" key until grey Apple appears.
Go to Installer menu (Panther and earlier) or Utilities menu (Tiger and later) and launch Disk Utility.
Select your HDD (manufacturer ID) in the left panel.
Select First Aid in the Main panel.
(Check S.M.A.R.T Status of HDD at the bottom of right panel. It should say: Verified)
Click Repair Disk on the bottom right.
If DU reports disk does not need repairs quit DU and restart.
If DU reports errors Repair again and again until DU reports disk is repaired.
When you are finished with DU, from the Menu Bar, select Utilities/Startup Manager.
Select your start up disk and click Restart
While you have the Disk Utility window open look at the bottom of the window. You will see Capacity and Available. Make sure you always have a minimum of 10% free disk space.
If you cannot boot from your install disk, try booting in Safe Mode
Carolyn

After most recent update, Firefox keep hanging intermittently with "Not Responding".

After the most recent update, my Firefox browser begins to hang intermittently with "Not Responding". I have checked the extensions and plug-in like Java, all of them are the latest updated ones. Everytime I open a new site or click on links to load another page, it happens. Every single time.

'''is there a solution ''(temporary OR permanent)'' for this problem yet?'''
i tried '''EVERY possible alternative'''; even when opened in ''''''safe mode'''''' or when installed for the first time w| '''NO addons or ANYthing else''' but the '''original default settings''', still does the same thing.
mozilla people?? really?? no answer|feedback|suggestions, anything at all from u guys??
if it isnt a version (browser, OS, addons, etc) issue, what is it that separates us from the users not having the problem?
this is is very frustrating; h|e it's even more frustrating when there is no response from tech support. is it because there havent been enough people who have reported this same issue so there can be some interest & find a fix; OR is it that u dont know; OR that there is not & will not be any fix?
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Citrix the screens hang intermittently

We have an Oracle 9205 database running on Windows 2003 server.
We are web deploying our application using Oracle9IAS 10222; we are using the forms listener servlet including Developer6i Patch 16. The version of Jinitiator is 1.3.1.17.
When deploying this via Citrix the screens hang intermittently and users are forced to log out of citrix and log back in. Interestingly Oracle Financial's is running fine on the same box.
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The use of Citrix or any terminal emulation software with Forms is not supported. In most cases, it is determined that the cause of these types of problems are the result of the emulation software (Citrix in your case) and not Oracle Forms. It is recommended that you retest in a non-Citrix environment. If the problem is no longer reproducible you should then contact the Citrix vendor.
To be a valid, supported Forms user (client) the client machine must have a browser and Jintiator (JRE) install on their local machine. It is also required that the browser cache and JRE cache are stored locally.
Ref. Metalink Doc ID# 68047.1

LR 2.0 Synchronization hangs

Is anybody else seeing this, hopefully with a solution or workaround?
When I try to synchronize some folders with more than around 120 files, LR shows the progress up to 25% or so in its titlebar, and then - nothing. The percent complete vanishes from the titlebar, and LR never finishes the sync. I left it running Synchronize Folder on a folder with just over 800 images (by its count in the folder panel) for over 8 hours today while I was out of the office, and it never finished even the "Import new photos(counting)" portion. Synchronizing individual sub-folders of that folder with 90-120 files works fine, completing each one in under a minute, but one with 128 files hangs.
Any tips, fixes, or workarounds greatly appreciated!
Jack

> When I try to synchronize some folders with more than around 120 files, LR
> shows the progress up to 25% or so in its titlebar, and then - nothing.
> The percent complete vanishes from the titlebar, and LR never finishes the
> sync. I left it running Synchronize Folder on a folder with just over 800
> images (by its count in the folder panel) for over 8 hours today while I
> was out of the office, and it never finished even the "Import new
> photos(counting)" portion. Synchronizing individual sub-folders of that
> folder with 90-120 files works fine, completing each one in under a
> minute, but one with 128 files hangs.
I discovered similar non-linear performance problems when generating
previews. The time to generate each preview increased as the number of
previews increased. With a small number of previews, LR 2 could generate
one preview per second. As the number of previews increased, the time to
generate a single preview increased to ten seconds per preview, and at
40,000 images, LR 2 could not generate even one preview in several hours.
After a week of trying to get it to work, I finally had to remove LR 2. I'm
waiting for the release that fixes these performance problems.
Best,
Christopher

FDB hangs intermittently and needs to be killed

Hey,
Do you guys have any idea what may cause this issue?
Sometimes when you publish a project, the debugger says it is ready, and Flash Player 10 is running, but its window never appears. When trying to compile again, the OS reports that the SWF file is locked.
The problem does not occur with Flash Player 9, but I have been able to repeat this issue with every version of Flash Player 10, using the external debug player on Windows. It happens intermittently so it is very hard to track down.
For what I know, Java (running mxmlc/fcsh/fdb) gets hung up. It sometimes starts working again if you kill every instance of FlashPlayer.exe ... ending the current debug session. It also starts to work if you kill every instance of Java.exe and try again.
I have not seen this issue when debugging by hand. The issue appears to be with the combination of Java and the Flash 10 player, and I have the feeling that it occurs because of something happening too quickly. Yes, I am using FlashDevelop, but it should not matter. FlashDevelop compiles the SWF, copies the result to the target directory, starts the debugger, then launches the external player when the debugger is ready. It offers the same commands I give the debugger by hand, so maybe Flash Player 10 has some kind of "warm up" period which sometimes gets the best of the debugger. Either way, FlashDevelop launches FDB, waits for the prompt, and offers commands.
Does Flex Builder use the same apps as the Flex SDK? Perhaps it does not occur because FlashDevelop runs faster. The problem is more likely to occur with bigger, more complicated files. Perhaps Flash Player 10 loads up, reports itself as ready, but still has to load up code. If for some reason this initialization stage takes a frame too long, FDB tries to talk to it as if it were ready, but its come through just too soon.
You can see more details about this here:
http://www.flashdevelop.org/community/viewtopic.php?f=6&t=4707
It's been over two years since I started having this issue. I stuck with Flash Player 9 for a long time because of it. Now that I use Flash Player 10 for all my projects, it feels like its time to try and figure out what's going on here. It's easy to pass the buck and say its a FlashDevelop problem, but that really is not what I am seeing ... and if FlashDevelop had to do something different, like add an artificial pause to wait for Flash Player to initialize, it would at least be helpful to know what needs to be done to negotiate the debugger without hanging it.
I appreciate your help and I don't mean to come across as confrontational if I sound that way. I'm just hoping to get down to a real answer and not assume that this is "just the way things are"
Thank you!

I have a few thoughts. For one thing, reading through the thread over on flashdevelop.org, some (and perhaps all) of the problems people encountered were due to a bug in the Flash player, which was fixed this past summer. (The Flash Builder record of the bug is here: http://bugs.adobe.com/jira/browse/FB-16153 -- but the bug was actually in the player.)
So please make sure you have the latest debugger version of the Flash player. You can get the latest version here: http://www.adobe.com/support/flashplayer/downloads.html
That is almost certainly the cause of the "WARNING: The Player that you are using does not support all fdb commands" message that member "elyon" described in his post on June 4, 2009. Hopefully it will help with whatever problems you are running into.
In another post that same day, elyon saw this output from FDB:
Adobe fdb (Flash Player Debugger) [build 4852]
Copyright (c) 2004-2007 Adobe, Inc. All rights reserved.
Waiting for Player to connect
Player connected; session starting.
Unexpected error while processing command.
For diagnostic purposes stack trace follows:
But apparently there was no stack after that message. If you can reproduce that error message, the way to get stack dumps to appear is to pass "-Dtrace.error=true" to Java when it launches FDB. This is a Java property, so it must be passed as an argument to Java, not to FDB. For example, if launching FDB from the command line, you can launch it like this:
java -Dtrace.error=true fdb.jar
> Does Flex Builder use the same apps as the Flex SDK?
Yes, but not in quite the same way FlashDevelop does. FDB has a public Java API that can be called by any Java app to control debugging, and that's what Flex Builder does, unlike FlashDevelop's approach. So, FlashDevelop and Flex Builder are using the exact same underlying debugger code; it's possible that there is some sort of problem with FlashDevelop's communication over the pipe, I just don't know.
You say you haven't seen this issue when "debugging by hand" -- you mean when using FDB directly? If so, then I suppose the Flash player version isn't the problem. I'd be interested to see a repro case that involved just FDB (perhaps reading commands from a file or a pipe if that's the easiest way to reproduce it).
There is nothing unusual about FDB's communication with stdin and stdout, it's pretty standard stuff. Also, it's all open source, http://opensource.adobe.com, so you can debug it if you want.
- Mike Morearty
Flash Builder team

After installing Adobe Flash Player Plugin to view videos on youtube, mozilla gets hangs intermittently. Please help

I installed Firefox 23.0.1 and after that It asked me to install Flash Player Plugin to view videos on Youtbe. I installed Flash Player 11 Plugin and since then Mozilla started hanging/freezing intermittently. It hangs on those websites also where videos are not running.
I uninstalled Flash Player 11 Plugin and it works smoothly without it.
Please help

This is some standard guidance that addresses the most common reasons for Flash problems in Firefox:
(1) Make sure all recorders/downloaders that interact with Flash media are as up-to-date as possible, or disable them.
(2) Disable hardware graphics acceleration in Firefox and in Flash
(A) In Firefox, un-check the box here and restart:
orange Firefox button (or Tools menu) > Options > Advanced > General > "Use hardware acceleration when available"
(B) In Flash, see this support article from Adobe: http://helpx.adobe.com/flash-player/kb/video-playback-issues.html#main_Solve_video_playback_issues
(3) Disable protected mode (Windows Vista/7/8)
See this support article from Adobe under the heading "Last Resort": [http://forums.adobe.com/message/4468493#TemporaryWorkaround Adobe Forums: How do I troubleshoot Flash Player's protected mode for Firefox?]

C application hangs intermittently on invoking Closehandle() function in Win 7 64bit OS

Hi,
I have a application which basically deals with network operations like begin session, send/receive etc. The application also has mutex create, request and close. Before terminating the transaction between the client and server, there is a call to Closehandle()
while clears that mutex that was created during initialization. (Mutex is released prior to close). During closing the mutex, in Windows 7 64 bit OS, the application goes to hung state intermittently. The same application used work without any issues in Win
XP.
PS: The C application is written in Visual Studio 6.0
Hence requesting for any thoughts to resolve this problem!!
Thanks in Advance!

Hi,
When application hangs, it needs to be restarted. Yes, this problems happens sometimes.
With respect to the anti-virus and firewalls, I had tried turned off firewalls and anti-virus but did not help!
This application basically acts as a network layer which is the bridge between client and server.
Below is the code snippet from the app which shows about mutex creation, request and close. I had configured ADPlus to the application to check on which line of the code the hang occurs and from that dump file could notice that the cause for the hang is
Closehandle() function.
Code snippet -
typedef unsigned long OSLMUTEXSEM;
extern OSLMUTEXSEM gsemCrypt;
void PASInitialize() {
char * pMutexSemName;
DWORD NTRC;
pMutexSemName = gsemCrypt;
oslRc = MutexSemCreate((char*)NULL,&gsemCrypt)); //Mutex creation by calling CreateMutex() function
oslRc = MutexSemRequest( gsemCrypt, SEM_WAIT_FOREEVER); //Request the semaphore by calling WaitForSingleObject() function -infinite //timeout
// some operation
oslRC = MutexSemRelease( gsemCrypt )); // release the mutex by calling ReleaseMutex function
void PASTerminate(){
oslRC = MutexSemClose(gsemCrypt); //calling Closehandle()function to close the mutex
WSACleanup();
From the dump files, it was noticed that the hang happens at the call MutexSemClose(..) function which in turn calls windows function Closehandle().

Hangs intermittently

Happy New Year, everyone, from frosty Scotland. Mine's off to a lousy start. My four-year-old iBook G4 (OSX 10.3.9) has started freezing up on me, intermittently. Sometimes a reboot works (although it soon ends in tears); other times I end up at a blue screen. There's plenty of free disk space. I've reset the PRAM and run the disk first-aid. I've booted from the system disks. I've also had a good look on here for similar problems - have I fallen victim to the infamous logic board fault? Applying a c-clamp doesn't make much difference - the iBook hangs with or without clamping (although I'm not entirely sure I'm clamping where I should be).
The machine seems to work best when it's cold; I put in a good two-hour stint tonight before it started to act up. Anything?

Sorry that your New Year is getting off to such a bad start. Freezing can have many causes, and unfortunately the logic board can be one of them. Other possibilities may be a dying hard drive and software corruption.
Unfortunately, when I had logic board problems, it was definitely heat related. It would freeze after 15-20 minutes. If I set up a fan, it would go about twice that long.
Do you still have the original hard drive? If so, it may be getting long in the tooth. Here is a utility that you can download and run several times for free:
http://www.versiontracker.com/dyn/moreinfo/macosx/32454
This utility will give you more insight into the S.M.A.R.T. status of your hard drive than Disk Utility will.
What does the iBook do when booted from a disc? If it still slows and freezes, that would point to the logic board, as you are essentially bypassing the hard drive and the OS.
If you want to exert pressure on the logic board, here is an article that might help to apply it at the right point:
http://www.coreyarnold.org/ibook/
Finally, to eliminate all possibility of a software cause, you might want to try reinstalling the OS.
It would probably be prudent to back up all your data if you haven't already and keep it backed up. Until your iBook is diagnosed and fixed, there is always the danger that it could die at any time.
Sorry to not be able to be more encouraging.
Good luck!

Essbase Server Hangs Intermittently - Urgent pls Help

Essbase Version - 9.3.3
Shared Services - 9.3.3
Enviroment - Windows Server 2003
We are in the process of migrating the users from Domain A to Domain B
There are around 15000 users across the board, out of which I assume there are around 250 users accessing the Hyperion Application.
Since the Domain Migration was started, We encountered Essbase Server freezes Intermittently.
Essbase Server goes down for about 10-15 Minutes and automatically comes back. No Error Msg in the Essbase Log.
Active Directory Migration was put on Hold because business had to complete their Month end Activities.
While we were working to find the RCA and identified that few users who were migrated from Domain A to Domain B appeared to be on Both the Domain and we figured out that it might be one of the reason for Essbase Server Hangs.
We had a Plan to Run the Update native Directory Utility to clear the Stale Data
Post Performing the Action our system was stable and didn't had system Hangs.
we also changed the shared services Cache refresh Interval to 24 Hrs in CSS.xml File ( Just to Make sure the Refresh happens Overnight)
Since the Active Directory Team had resumed their Migration Activies, we started Experiencing the System Hangs Issues again. server goes down for 5-10 min and comes back up
Please Input your Valuable Thoughts, Would Really Appreciate your Help.
Thanks in Advance.

Hi,
Thanks for your prompt response.
As mentioned, AD team have the filters on place, There is no issues with the User Access and there was no change in password after migrating the Domain.
I have checked the Display Session through Maxl and there is No heavy sessions.
As Stated earlier, we are unable to identify the cause regarding the System Freeze. All users access the application all of sudden essbase server hangs and it doesn't allow user to retrieve the data, nor allow him to access any application within Essbase and Planning.
After 5-10 Min, server automatically comes back.
Can you tell me if there is a way to track the system Hangs through Essbase Log without getting the any inputs from the users.
Assuming if the users sessions are heavy what makes the server hang and automatically resumes without intervention.
Shared Services Security Log display the following Error, Can you tell me if you had come across any such errors before.
com.hyperion.css.spi.impl.msad.MSADCacheUpdater.updateUserCache(Ljavax.naming.directory.DirContext;Lcom.hyperion.css.common.CSSNodeImpl;Ljava.lang.String;Ljava.lang.String;Lcom.hyperion.css.datastructures.ProviderCacheMap;Ljava.util.Map;)V(Unknown Source) - Ignoring User. Error getting User for User Cache:[LDAP: error code 32 - 0000208D: NameErr: DSID-031522C9, problem 2001 (NO_OBJECT), data 0, best match of:
'OU=USMigrate,OU=Add_Audit,OU=Users,OU=Accounts,OU=RAC-IOC,DC=us,DC=ricoh,DC=ds'
Error Code: -1
com.hyperion.css.common.configuration.CSSConfigurationException: Unable to load certificate from keystore or unable to locate keystore: SAP.keystore Error Code: 9
NestedException:
com.hyperion.css.common.configuration.CSSConfigurationException: No certificates present for SAP Authentication to take place Error Code: 9
at com.hyperion.css.SAPSecurity.loadKeyStoreWithSAPCertificate(Ljava.util.ResourceBundle;Ljava.security.KeyStore;Ljava.lang.ClassLoader;)Ljava.security.KeyStore;(Unknown Source)
Please advise.
Thanks in Advance.

SQLDeveloper hangs intermittently

I have been using SQL Developer for several years now and I have never experience a version which did not have issues with hanging and many times requiring me to kill the process.
I was very excited to see version 4.0 however I still have issues with intermittent hanging sessions.
Does anyone know if this is a windows issue, java issue, poor connection management....???
cheers,
j-e

Apparently the PL/SQL was padded out to 256 chars per line
This caused the JVM to run out of memory.
Unfortunately, I automatically assumed this was SQL developer hanging up.
What PL/SQL are you talking about? You didn't mention what you were actually doing when it hung up.

Too many dialogs get stuck on CPIC stopped,SAP hangs intermittently on prod

Hi All,
I'm having a problem with a production system in which users started complaining about getting the hourglass cursor intermittently, and this is happening from multiple different locations / networks. Around the time the problem occurs, SM66 shows many dialog processes in status "Stopped CPIC". The processes are from different users and processes.
I've checked the workprocess trace files, made sure there was no memory bottleneck with the gateway profile params, checked System log and oracle alert log, but cannot find any clues.
Could anyone please suggest some other places to look for clues or possible suggestions?
Thanks!
Ian
System info
Netweaver 7.0, ECC 6.0
Oracle 10.2.0.4.0
AIX 5.3

Thanks for all your comments (points given).
The problem and solution was very interesting.
1. We found that an external AS400 system that communicates with SAP was somehow sending the IP address in EBCDIC format, which looks like strange characters. We saw the strange characters in the Gateway NI/Hostname buffer. During each hang situation, we saw these special characters in the Gateway trace file. The Gateway was attempting to resolve the IP address for the strange EBCDIC characters, but the EBCDIC characters were actually the IP address itself when converted from EBCDIC to ASCII.
2. As per SAP, we added the strange character hostname/IP to the /etc/hosts file with the correct IP, and the hangs stopped happening.
3. After these 60 second hangs stopped happening, we were still getting 10 second hangs every 3 hours.
4. SAP found that the Gateway logging option was causing the 10 second hangs.
5. SAP is working on a kernel fix so that the Gateway doesn't hang in these situation. We have the workaround in place for the time being.
Thanks,
Ian

GW API hangs intermittently when shutting down

I would welcome any insight into the following issue.
I have an application that uses the GroupWise Objects API to search users
mailboxes for new messages that fit certain criteria and generate XML that
describes them. This application is run as part of a batch process. On a
customer site, the application occasionally hangs, blocking the rest of the
batch process, leading to no end of grief!
The customer is using GroupWise 7.0.3 build 1068 - I have the same build on
my test system but have been unable to replicate the issue.
I have got the customer to run debug diagnostics to generate hang dumps on
the stalled process at 5 minute intervals. When we examined the dumps, we
found the application had hung at shutdown, sleeping waiting for a function
in gwenv1.dll to complete. Here is the relevant part of the output and
stack trace:
Type Description Recommendation
Warning The following threads in
GroupWiseConnector.exe__PID__3056__Date__09_23_200 9__Time_01_24_05PM__117__Manual
Dump.dmp are calling the Sleep API. The call to this API originated from
gwenv1!WpioTimeDelay+12.
( 0 )
25.00% of threads blocked
The duration of the Sleep call is 500 miliseconds. Short calls to the
Sleep API often occur inside of a tight loop, which will delay the
application and cause high CPU until the loop is exited.
Please follow up with vendor Novell, Inc. for problem resolution
concerning the following file: C:\WINDOWS\system32\gwenv1.DLL.
This thread is calling the Sleep API. The call to this API originated from
gwenv1!WpioTimeDelay+12.
Function Source
ntdll!KiFastSystemCallRet
ntdll!NtDelayExecution+c
kernel32!SleepEx+68
kernel32!Sleep+f
gwenv1!WpioTimeDelay+12
gwenv1!WpcomTCPClientSSL+27a6
gwenv1!SYM_CheckVersion+137
gwenv1!WpcomExit+33
gwenv1!WpeGlobalExit+5d
GWXPLT1!XPDmPrefCache::AreDefaultListsSame+178a9b
gwcma1!DllUnregisterServer+30b
gwcma1!DllUnregisterServer+380
gwcma1!DllUnregisterServer+32b62
gwcma1!DllUnregisterServer+32990
gwcma1+126e
gwcma1+4e3c
oleaut32!CStdDisp::Release+11
oleaut32!VariantClear+b1
Does anyone have any insight into why it is wating? (TCP SSL perhaps?)
What type of object is blocking?
What conditions might cause this to occur?
Is there any way to stop it?
Is this a GroupWise bug?
Dave M

I have implemented a brute force and ignorance work-around to this problem.
When the application is told to shutdown, I keep track of the time, and wait
5 minutes for the process to stop. If it doesn't shut down cleanly in that
time, I unceremoniously kill the process. Hardly elegant, but...
I would still like to understand what is causing the GW api to hang as I may
have an underlying issue, but time to move on.
Thanks
Dave M
"Preston Stephenson" <[email protected]> wrote in message
news:[email protected]...
> I'll pass the details onto another developer to see if he has
> seen anything like this.
>
>>>> On Thursday, September 24, 2009 at 11:35 AM, Dave M<[email protected]>
> wrote:
>> I would welcome any insight into the following issue.
>>
>> I have an application that uses the GroupWise Objects API to search users
>
>> mailboxes for new messages that fit certain criteria and generate XML
>> that
>
>> describes them. This application is run as part of a batch process. On a
>
>> customer site, the application occasionally hangs, blocking the rest of
> the
>> batch process, leading to no end of grief!
>>
>> The customer is using GroupWise 7.0.3 build 1068 - I have the same build
> on
>> my test system but have been unable to replicate the issue.
>>
>> I have got the customer to run debug diagnostics to generate hang dumps
>> on
>
>> the stalled process at 5 minute intervals. When we examined the dumps,
>> we
>
>> found the application had hung at shutdown, sleeping waiting for a
> function
>> in gwenv1.dll to complete. Here is the relevant part of the output and
>> stack trace:
>>
>> Type Description Recommendation
>> Warning The following threads in
>>
> GroupWiseConnector.exe__PID__3056__Date__09_23_200 9__Time_01_24_05PM__117__M
>
>> anual
>> Dump.dmp are calling the Sleep API. The call to this API originated from
>> gwenv1!WpioTimeDelay+12.
>>
>> ( 0 )
>>
>> 25.00% of threads blocked
>>
>> The duration of the Sleep call is 500 miliseconds. Short calls to
>> the
>
>> Sleep API often occur inside of a tight loop, which will delay the
>> application and cause high CPU until the loop is exited.
>>
>> Please follow up with vendor Novell, Inc. for problem resolution
>> concerning the following file: C:\WINDOWS\system32\gwenv1.DLL.
>>
>>
>> This thread is calling the Sleep API. The call to this API originated
>> from
>
>> gwenv1!WpioTimeDelay+12.
>>
>> Function Source
>> ntdll!KiFastSystemCallRet
>> ntdll!NtDelayExecution+c
>> kernel32!SleepEx+68
>> kernel32!Sleep+f
>> gwenv1!WpioTimeDelay+12
>> gwenv1!WpcomTCPClientSSL+27a6
>> gwenv1!SYM_CheckVersion+137
>> gwenv1!WpcomExit+33
>> gwenv1!WpeGlobalExit+5d
>> GWXPLT1!XPDmPrefCache::AreDefaultListsSame+178a9b
>> gwcma1!DllUnregisterServer+30b
>> gwcma1!DllUnregisterServer+380
>> gwcma1!DllUnregisterServer+32b62
>> gwcma1!DllUnregisterServer+32990
>> gwcma1+126e
>> gwcma1+4e3c
>> oleaut32!CStdDisp::Release+11
>> oleaut32!VariantClear+b1
>>
>>
>>
>>
>> Does anyone have any insight into why it is wating? (TCP SSL perhaps?)
>>
>> What type of object is blocking?
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>> What conditions might cause this to occur?
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>> Is there any way to stop it?
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>> Is this a GroupWise bug?
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>>
>> Dave M

MBP hangs intermittently

I have a mid 2009 macbook pro with a 2.8 GHz Core2Duo and 4GB DDR3 1066MHz RAM. I don't understand why sometimes the laptop will hang and this happens randomly, while surfing the net or even if I'm just opening an application. I can't understand whats causing this because I think the specs are more than enough to handle normal internet browsing and a few other applications open simultaneously.
Any help would be greatly appreciated.
Oh and I'm also using Windows 7 Ultimate 64bit via bootcamp if that makes any difference.

When memory gets low and you start paging out, you can experience that. Next time it happens, try logging into another User account and try running in there for a day. See if it still happens.
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DAQCard6062E hangs intermittently during acq

Code written in VC++ 6.0, NIDAQ 6.9.3, OS: Win2000&98, various laptops from P2-450MHz to P3-1.2GHz.
Using SCAN_Start for continuous mode acquisition to a single buffer (16 channels, 20KHz). After a variable number of samples acquired (usually around 1e6 to 14e6), acquisition hangs. At this point DAQ_Monitor returns error -10845 (overFlowError) once, and then -10608 (noTransferInProgError) thereafter. At this point, the acquisition must be stopped and restarted.
The hangs only occur after many cycles through the acquisition buffer, so I don't think it is a buffer boundary problem. Hangs also occur even if there are no transfers to secondary buffers (via DAQ_Monitor), so I don't think it's a memory access conflict.
Greatly lowering acquisition bandwidth (e.g. 20kHz X 1 channel) eliminates the problem, but the driver hangs at acquisition rates well below maximum bandwidth (e.g. it hangs using 20kHz X 8 channels = 160KHz aggregate).
I have included a simple console app that demonstrates the problem. This app does not actually do anything but monitor the acquisition once it starts. When the acquisition hangs, a beeping message is displayed.
I hope someone can help me solve this problem, or at least tell me what I'm doing wrong. I am at wit's end!
John Burt
Attachments:
daqtest1.zip ‏52 KB

John,
Actually, the error -10845 is a hardware, not software, overflow error. This error occurs when the NI-DAQ driver cannot read data from the DAQ device's FIFO buffer fast enough to keep up with the acquired data. In your case, this is probably because the FIFO buffers on a PCMCIA card are much smaller than those found on a PCI card. Furthermore, the PCMCIA bus does not support Direct Memory Access (DMA) which is used for fast transfer. The DAQCards rely on interrupts to transfer data from their FIFO to PC memory. Unlike DMA transfers, interrupt transfers consume processor time and are thus highly system dependent. Additionally, they are much slower than DMA transfers.
There are two primary solutions to this issue. There are lowering the sampl
e rate or using a much faster computer to process the interrupts at a higher rate. Additionally, the FIFO on this board is limited to 8,192 samples. You should ensure that you are not acquiring more than this many samples at a time.
Please reference the following Knowledge Base article for more information on this subject.
Data Acquisition Errors -10845 and -10846, What Is the Difference?
http://digital.ni.com/public.nsf/websearch/70C74F12DC728114862568EB007F5338?OpenDocument
Regards,
Justin Britten
Applications Engineer
National Instruments

Synchronization hangs intermittently

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