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Hi Bastian,
One of our customers is experiencing frequent crashes using our application (I am with a software development firm).
Using "procmon", I found that the application crashes when the process is looking for a DLL that is located on a Win2K8 network share, and cannot find it. But the DLL is there. I mean, it is in a read-only folder so it cannot really disappear and reappear...
This is quite similar to the symptoms you are describing. Or is there a question of synchronisation between the copy operations for ClientA and ClientB?
Also, how did you disable SMB2?
Any helps or insights are appreciated.
> On Wednesday, March 03, 2010 3:54 AM Bastian wrote:
> Hello,
>
> I am facing a very curious behaviour these days. I have the following
> test-environment (all Win2008 Servers!):
>
> - 'SRV' is hosting a network-share '\\srv\share\SRC'
> - 'ClientA' checking for files in \\srv\share\SRC. If a file has found then
> he will do a convert with an 3rd-Party-Tool to \\srv\share\ClientA.
> Converting means that he writes a new file to the ClientA-Folder
> - 'ClientB' checking for files in \\srv\share\ClientA. If a file has found
> the he will do the same (convert) to \\srv\share\ClientB.
>
> So what happens now, is that ClientA is workling properly without any
> problems. All files found in SRC-Folder will be converted to ClientA-Folder.
> In the next step (Convert by ClientB) ClientB has problems with finding all
> files in Client-A folder. Around 20-30% of the files will be found by ClientB
> and successfully converted to \\srv\share\ClientB (Note: The Client will be
> informed by the Server which file must be converted).
>
> Now the curious thing: If I will open \\srv\share\ClientA-Folder on ClientB in
> explorer while ClientB is converting the files within this folder he will
> find ALL files (100%). I have tested this on two different installations and
> the behaviour is everywhere the same. All files will be written correctly by
> ClientA so the files must be found by ClientB. This happens also with shared
> folders located on local and SAN-Disks. The conversion-tool should not be the
> source of this behaviour, too.
>
> So, is there any sort of file caching on Win2008-Servers? On Win2003-Server
> all is running correctly. Offline-Files are deactivated on both - Server and
> Clients.
>
> Perhaps somebody can help me with this.
>
> Best Regards,
>
> Bastian
>> On Thursday, March 04, 2010 3:01 AM Meinolf Weber [MVP-DS] wrote:
>> Hello Bastian,
>>
>> If you have problems accessing shared folders on Windows server 2008 check
>> the following article about known network problems:
>> http://msmvps.com/blogs/acefekay/arc...-problems.aspx
>>
>> Additional make sure to use only the domain internal DNS servers on the NIC
>> of all machines. Sometimes it is also helpful to disable IPv6 on the Windows
>> server 2008 machine:
>> http://blogs.dirteam.com/blogs/paulb...dows-2008.aspx
>>
>> Best regards
>>
>> Meinolf Weber
>> Disclaimer: This posting is provided "AS IS" with no warranties, and confers
>> no rights.
>> ** Please do NOT email, only reply to Newsgroups
>> ** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm
>>> On Thursday, March 04, 2010 5:49 AM Bastian wrote:
>>> Hello Meinolf,
>>>
>>> at first thank you for the fast reply. I have checked all participating server
>>> for ipv6 and disabled rss and autotuninglevel, but the problem
>>> still exists.
>>>
>>> I am stumped...
>>>
>>> Best Regards
>>>
>>> Bastian
>>>
>>>
>>>
>>> "Meinolf Weber [MVP-DS]" wrote:
>>>> On Thursday, March 04, 2010 1:16 PM Ace Fekay [MVP-DS, MCT] wrote:
>>>> server=20
>>>>
>>>> From what you are stating, at this point, I do not think it is network =
>>>> connectivity, and no, caching would not be an issue, unless you are using =
>>>> Redirection. I would suggest to check the application if you can enable =
>>>> logging or check with Process Explorer to see exactly where it is =
>>>> failing. It could be something simple as AV causing it. If not, I am not =
>>>> sure how your app is checking the folder. If it is using the =
>>>> NtChangeDirectoryNotification event, and the files are being populated =
>>>> quickly, it could also be a timing problem.
>>>>
>>>> --=20
>>>> Ace
>>>>
>>>> This posting is provided "AS-IS" with no warranties or guarantees and =
>>>> confers no rights.
>>>>
>>>> Please reply back to the newsgroup or forum for collaboration benefit =
>>>> among responding engineers, and to help others benefit from your =
>>>> resolution.
>>>>
>>>> Ace Fekay, MVP, MCT, MCITP EA, MCTS Windows 2008 & Exchange 2007, MCSE & =
>>>> MCSA 2003/2000, MCSA Messaging 2003
>>>> Microsoft Certified Trainer
>>>> Microsoft MVP - Directory Services
>>>>
>>>> If you feel this is an urgent issue and require immediate assistance, =
>>>> please contact Microsoft PSS directly. Please check =
>>>> http://support.microsoft.com for regional support phone numbers.
>>>>> On Friday, March 05, 2010 6:14 PM Matija Kapraljevic [Revenger] wrote:
>>>>> I am not sure this is the issue, but, Windows Server 2008 has something
>>>>> called 'Branch caching'.
>>>>> It could be what you are looking for.
>>>>>
>>>>> Check out these links:
>>>>> http://www.microsoft.com/windowsserv...e.aspx?pf=true
>>>>> http://blogs.techrepublic.com.com/networking/?p=1081
>>>>>
>>>>> Post some info if you solve this one...
>>>>>> On Saturday, March 06, 2010 9:16 PM Ace Fekay [MVP-DS, MCT] wrote:
>>>>>> Win2003-Server=20
>>>>>> Server and=20
>>>>>> http://www.microsoft.com/windowsserv...e.aspx?pf=3Dt=
>>>>>> rue
>>>>>>
>>>>>>
>>>>>> I would also be curious what the resolution is.
>>>>>>
>>>>>> Ace.
>>>>>>> On Tuesday, March 09, 2010 11:16 AM Bastian wrote:
>>>>>>> Hello,
>>>>>>>
>>>>>>> BrancheCache is not installed on the servers. I have done some more tests and
>>>>>>> I think I have located the source of my problems.
>>>>>>>
>>>>>>> I moved the shares '\\srv\share\SRC|ClientA|ClientB' to a windowsxp-client
>>>>>>> and all is running fine. So there must be a problem with the w2k8 server
>>>>>>> hosting the file shares... I have checked the following:
>>>>>>>
>>>>>>> - AntiVirus-Software => turned off
>>>>>>> - "Caching" (Offline Settings => Files or programs from the will not be
>>>>>>> available offline
>>>>>>> - Folder Archiving and Indexing => turned off
>>>>>>>
>>>>>>> There must be sth. about sharing where the behaviour of w2k8 is different to
>>>>>>> w2k3/xp/etc...
>>>>>>>
>>>>>>> Best Regards
>>>>>>>
>>>>>>> Bastian
>>>>>>> "Ace Fekay [MVP-DS, MCT]" wrote:
>>>>>>>> On Tuesday, March 09, 2010 12:22 PM Ace Fekay [MVP-DS, MCT] wrote:
>>>>>>>> tests and=20
>>>>>>>> windowsxp-client=20
>>>>>>>> server=20
>>>>>>>> be=20
>>>>>>>> different to=20
>>>>>>>>
>>>>>>>> There could be a number of things causing it. What type of clients are =
>>>>>>>> accessing it? Is this server a DC?
>>>>>>>>
>>>>>>>> If a DC, you may need to disable SMB signing, but that depends on the =
>>>>>>>> type of clients accessing it.
>>>>>>>>
>>>>>>>> Also, you may want to look at disabling RSS TCP Chimney feature, and =
>>>>>>>> IPv6. Read more on it...
>>>>>>>>
>>>>>>>> TCP Chimney and RSS Features May Cause Slow File Transfers or Cause =
>>>>>>>> Connectivity Problems=20
>>>>>>>> http://msmvps.com/blogs/acefekay/arc...ney-and-rss-f=
>>>>>>>> eatures-may-cause-slow-file-transfers-or-cause-connectivity-problems.aspx=
>>>>>>>>
>>>>>>>>
>>>>>>>> Ace
>>>>>>>>> On Wednesday, March 10, 2010 3:59 AM Bastian wrote:
>>>>>>>>> Hello Ace,
>>>>>>>>>
>>>>>>>>> RSS TCP Chimney and IPv6 is disabled on all servers. The server hosting the
>>>>>>>>> shares is an w2k8 enterprise failovercluster (2 nodes) and is not a domain
>>>>>>>>> controller.
>>>>>>>>>
>>>>>>>>> Best Regards
>>>>>>>>>
>>>>>>>>> Bastian
>>>>>>>>>
>>>>>>>>> "Ace Fekay [MVP-DS, MCT]" wrote:
>>>>>>>>>> On Wednesday, March 10, 2010 10:58 AM Ace Fekay [MVP-DS, MCT] wrote:
>>>>>>>>>> hosting the=20
>>>>>>>>>> domain=20
>>>>>>>>>>
>>>>>>>>>> Ok, then I assume 'SRV' is the cluster name published in DNS and WINS? =
>>>>>>>>>> Otherwise, I am assuming you have correctly configured sharing on the 2008 =
>>>>>>>>>> server, cluster or not, and set the Offline settings as such:
>>>>>>>>>> http://www.techotopia.com/index.php/...er_2008_File_=
>>>>>>>>>> Sharing
>>>>>>>>>>
>>>>>>>>>> Ace
>>>>>>>>>>> On Thursday, March 11, 2010 4:13 AM Bastian wrote:
>>>>>>>>>>> Hello Ace,
>>>>>>>>>>>
>>>>>>>>>>> "SRV" ist the dns-name belonging to the clustergroup which is hosting the
>>>>>>>>>>> fileshares. I have tested with the ip-address, too. The shares are configured
>>>>>>>>>>> as discribed on your link. Setting up a local share (not in a clustergroup)
>>>>>>>>>>> has not any effect.
>>>>>>>>>>>
>>>>>>>>>>> Regards
>>>>>>>>>>>
>>>>>>>>>>> Bastian
>>>>>>>>>>>
>>>>>>>>>>> "Ace Fekay [MVP-DS, MCT]" wrote:
>>>>>>>>>>>> On Thursday, March 11, 2010 11:58 AM Ace Fekay [MVP-DS, MCT] wrote:
>>>>>>>>>>>> the=20
>>>>>>>>>>>> configured=20
>>>>>>>>>>>> clustergroup)=20
>>>>>>>>>>>>
>>>>>>>>>>>> Then I am at a loss to figure out what is going on with your share =
>>>>>>>>>>>> connectivity, unless it is something in the cluster. Maybe someone else =
>>>>>>>>>>>> can help, or if it persists and causes problems, a call into PSS should =
>>>>>>>>>>>> be in order.
>>>>>>>>>>>>
>>>>>>>>>>>> Ace
>>>>>>>>>>>>> On Friday, March 19, 2010 11:20 AM Juergen Kluth wrote:
>>>>>>>>>>>>> May be mapping to drive letters work.
>>>>>>>>>>>>> jk
>>>>>>>>>>>>>> On Wednesday, May 12, 2010 5:59 AM Bastian wrote:
>>>>>>>>>>>>>> Hello,
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> I have figured out the cause of this behaviour. Disabling SMB 2.0 on the
>>>>>>>>>>>>>> Win2008 fileserver looks like to be the solution. So there must be some
>>>>>>>>>>>>>> caching mechanism in SMB 2.0 leading to this behaviour. I will try to get more
>>>>>>>>>>>>>> information about this...
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Best Regards
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Bastian
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> "Bastian" wrote:
>>>>>>>>>>>>>> Submitted via EggHeadCafe
>>>>>>>>>>>>>> SharePoint Tip / Thought of the Day WebPart
>>>>>>>>>>>>>> http://www.eggheadcafe.com/tutorials...y-webpart.aspx
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