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CIFS connection problem after an unknown amount of time

seraphon

Hi

I ve got this habit to open an CIFS connection at the morning to open some files in Alfresco's repository, with dev+ to edit them. It works just fine. When I edit such a file with notepad++ I can directly see in Alfresco web UI that the changes have indeed occured in Alfresco's repository.

Now the problem is that at some time of the day, when I want to navigate in my Alfresco's repository using windows explorer and a CIFS connection I get the following error

Z:\is not accessible.

No more connections can be made to this remote computer at this time because there are already as many connections as the computer can accept

Is this a problem coming from tomcat? The message says there are too many connections but I m the only user of Alfresco right now!

I tried deconnecting the CIFS drive and then reconnect it but the problem persist. And Restarting the tomcat server and Alfresco is not really a solution… But The files that I opened in notepad++ are still editable and when I do some changes to those files and saves I can see in the web navigator the the change have been taken in account.

Can someone please help me resolve this problem?

Regards
Seraphon

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gary_spencer

Hi,

This problem has been reported before but I've not been able to reproduce it here so far.

What's the client OS you're using and what OS is Alfresco running under ?. Are you mapping a drive or using UNC paths/browsing to save/load files ?.

Cheers

Gary

fschnell

We had experienced exactly the same. Certain amount of time, same message. Just having a Windows Explorer window open with path into Alfresco. I thought it was a network glitch. Saw it three times when using Community version 2.0 on Suse OpenLinux 10.1 with MySQL. Client WinXP-SP2 using UNC notation. Unable to deliberately reproduce. It either happens, or not.

I am in the process of upgrading to latest version.

Frank

callermd

AR-1343

seraphon

Hi
I m currently on windows XP v2.07 and I m on the machine where Alfresco is installed.
And I am mapping a drive to load/save files

Regards
Seraphon

gary_spencer

Hi,

When the problem occurs can you email me the output from the following commands (from the client) :-

net use \\share\name

nbtstat -S

netstat -n

Thanks

Gary

douglasheld

I'll just note, it would also be helpful to know if there's a firewall between the windows workstation and the Alfresco server.

seraphon

hi

garry could you detail me more what you want me to do?
I m not knowledgeable at all when it comes to connections and stuff.

Sorry but I think I cant email. So I ll detail a bit
I tried the command you told me in the command prompt and I get an error message for the net user part "system error67".

nbtstat -S give me 2 server, one with the name of my computer, the other the Alfresco's server name. Nothing unusual here except maybe the 31 MB /6MB input output.

netstat -n
gives me about 35 lines withn proto being TCP.
one of these 35 lines have a state of Time Wait

And I have no idea if there is a firewall or not….
There shouldnt be, if I can connect once no? My problem is that after a few hours I cant connect anymore. Looks like there is a limit to the number of time I can open a file and edit it with CIFS or something?

Regards
Seraphon

gary_spencer

Hi,

The commands should just run from a command prompt under WinXP.
The netstat command will dump out the list of connected sockets, the nbtstat command should dump the NetBIOS sessions (this might fail if NetBIOS is not enabled), the net use command should dump the connection stats for that share connection.

The net use command line should be :

net use \\<alfresco CIFS sever name>\alfresco

or do a 'net use' to see the active connections and look for the Alfresco server connection, then use those details in the net use command.

It looks like sessions or virtual circuits on a session are being closed, so as you open each file a new virtual circuit may be created. For some reason these aren't being cleared down, maybe due to something the client or server isn't doing.

I've tried a few things here to try and reproduce the problem but the virtual circuits are always cleaned up as expected.

Cheers

Gary

seraphon

Hi

Here is maybe what makes all those unclosed connections.
When I open an CIFS driver I then go into the Alfresco's repository and open several documents inside the Alfresco's repository. About 7,8 file are open from the CIFS drive in my notepad++.
The other that might be bothersome is that I often do changes to those files and thus make a lot of saves. There is also my webscripts that do a call to Alfresco's web service when I test them.

Maybe thats the problem
Hope someone will find the answers because it is very troublesome and not very appealing for Alfresco.

Regards
Seraphon

gary_spencer

Hi,

Could you email me the output from the commands.

Thanks

Gary

seraphon

Hi

I forgot to mention in my email that nobody except myself, was using Alfresco. So the another Id in my mail arent from colleagues. I personnaly have no idea where they come from.

Regards
Seraphon

dsgfh

Just suffered the same issue & found this thread looking for an answer.
I'm running 2.1RC from the windows installer on my laptop (XP SP2). I'm the only one accessing it, while I do some testing to verify it suits our needs.

At the time, I was doing a bulk copy of files using xcopy from the command prompt from an existing directory on our network into the alfresco repository.

Here's the output from those commands:

C:\>net use \\OC-Laptop-48_A\Alfresco
Local name
Remote name       \\OC-Laptop-48_A\alfresco
Resource type     Disk
Status            Disconnected
# Opens           3
# Connections     8
The command completed successfully.

************************************************************

Wireless Network Connection:
Node IpAddress: [10.64.35.115] Scope Id: []

                     NetBIOS Connection Table

    Local Name             State    In/Out Remote Host           Input   Output

    —————————————————————————-

    OC-LAPTOP-48   <00> Connected    Out       10.64.35.2                 23MB
       657KB
    OC-LAPTOP-48   <00> Connected    Out       10.64.35.115                5MB
        90MB
    OC-LAPTOP-48_A       Connected    In        10.64.35.115               90MB
         5MB

***********************************************************
C:\>netstat -n

Active Connections

Proto Local Address          Foreign Address        State
TCP    10.64.35.115:139       10.64.35.115:1177      ESTABLISHED
TCP    10.64.35.115:1090      10.64.35.2:139         ESTABLISHED
TCP    10.64.35.115:1121      72.14.253.125:5222     ESTABLISHED
TCP    10.64.35.115:1177      10.64.35.115:139       ESTABLISHED
TCP    10.64.35.115:1421      10.8.8.23:1025         ESTABLISHED
TCP    10.64.35.115:1528      10.64.35.85:12326      ESTABLISHED
TCP    10.64.35.115:1822      10.8.8.24:139          TIME_WAIT
TCP    10.64.35.115:1825      10.8.8.23:139          TIME_WAIT
TCP    127.0.0.1:1140         127.0.0.1:3306         ESTABLISHED
TCP    127.0.0.1:1141         127.0.0.1:3306         ESTABLISHED
TCP    127.0.0.1:1142         127.0.0.1:3306         ESTABLISHED
TCP    127.0.0.1:1143         127.0.0.1:3306         ESTABLISHED
TCP    127.0.0.1:1144         127.0.0.1:3306         ESTABLISHED
TCP    127.0.0.1:1145         127.0.0.1:3306         ESTABLISHED
TCP    127.0.0.1:1146         127.0.0.1:3306         ESTABLISHED
TCP    127.0.0.1:1147         127.0.0.1:3306         ESTABLISHED
TCP    127.0.0.1:1155         127.0.0.1:8100         ESTABLISHED
TCP    127.0.0.1:1460         127.0.0.1:1461         ESTABLISHED
TCP    127.0.0.1:1461         127.0.0.1:1460         ESTABLISHED
TCP    127.0.0.1:1462         127.0.0.1:1463         ESTABLISHED
TCP    127.0.0.1:1463         127.0.0.1:1462         ESTABLISHED
TCP    127.0.0.1:3306         127.0.0.1:1140         ESTABLISHED
TCP    127.0.0.1:3306         127.0.0.1:1141         ESTABLISHED
TCP    127.0.0.1:3306         127.0.0.1:1142         ESTABLISHED
TCP    127.0.0.1:3306         127.0.0.1:1143         ESTABLISHED
TCP    127.0.0.1:3306         127.0.0.1:1144         ESTABLISHED
TCP    127.0.0.1:3306         127.0.0.1:1145         ESTABLISHED
TCP    127.0.0.1:3306         127.0.0.1:1146         ESTABLISHED
TCP    127.0.0.1:3306         127.0.0.1:1147         ESTABLISHED
TCP    127.0.0.1:8100         127.0.0.1:1155         ESTABLISHED

gary_spencer

Hi,

Thanks for the information, it doesn't look like it's socket connections that the client is complaining about.

How many files are you copying with xcopy ?.

Cheers

Gary

seraphon

Hi

it may be useless but I confirm that the problems start when this message appear in the tomcat console:

### Excluding compile: org.alfresco.repo.search.impl.lucene.index.IndexInfo$Merger::mergeIndexes‍

Seems to me that it happens when I play with my custom webscripts. Maybe a problem from the lucene access?
I ll try to see if the problem occurs even when I m not using webscripts.

Regards
Seraphon

edit:the problem doesnt come from the webscript

dsgfh

Thanks for the information, it doesn't look like it's socket connections that the client is complaining about.

How many files are you copying with xcopy ?.

Sorry, been off on leave. I was attempting to copy around 20,000 files. I'm afraid I can't remember how many I got through before it failed, but I'm happy to try again to quantify it if you'd like.

Cheers,
Michael

callermd

It still bits us hard, especially from the Terminal server…

medalhas

Hi ,
any news from this problem?
we have the same problem in a customer, but we cannot replicate the error in our labs.

It's a really annoying error and it happens in the fifth pdf saved from a website.

jbdev

I have seen the same problem.

Alfresco 2.1
CentOS 4.5
Tomcat with bundle
No Firewall ( internal network )

Client will be using WinXP sp2 and just paths

while using CIFS with paths, all of the sudden we get this error of to many connections.