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CIFS limitation?

greglenain

When I try to copy a set of files (49 docs, 15 Mo) through CIFS, Alfresco closes the port and raises the following exception:

Winsock rx2 len=49
10:24:32,210 ERROR [alfresco.smb.protocol] Closing session due to exception
org.alfresco.filesys.netbios.win32.WinsockNetBIOSException: null - Message too long
at org.alfresco.filesys.smb.server.win32.WinsockNetBIOSPacketHandler.readPacket(WinsockNetBIOSPacketHandler.java:138)
at org.alfresco.filesys.smb.server.SMBSrvSession.runSMBSrvSession.java:1511)
at java.lang.Thread.run(Thread.java:595)

Only 20% of the files are processed before the problem occurs.

I operate that copy from a Window OS to an Alfresco 1.4 repository.

Are there some limitations in the CIFS usage ?

Thanks.

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gary_spencer

Hi,

Could you give us some more details on your OS version/service pack and network setup.

Cheers

Gary

greglenain

Client side:

OS: Windows XP, SP2IP conf: DHCPRepo side:

Alfresco 1.4 CEOS: Windows 2000, SP4HTTP Srv: Apache Tomcat 5.5.12Java: Sun 1.5.0 05IP conf: DHCPNetwork:

LAN: 100MbDomain server: Linux Red Hat 4Furthermore, the copy process succeeds when using FTP instead of CIFS.

greglenain

No news is good news ?

rdanner

When I try to copy a set of files (49 docs, 15 Mo) through CIFS, Alfresco closes the port and raises the following exception:

Winsock rx2 len=49
10:24:32,210 ERROR [alfresco.smb.protocol] Closing session due to exception
org.alfresco.filesys.netbios.win32.WinsockNetBIOSException: null - Message too long
at org.alfresco.filesys.smb.server.win32.WinsockNetBIOSPacketHandler.readPacket(WinsockNetBIOSPacketHandler.java:138)
at org.alfresco.filesys.smb.server.SMBSrvSession.runSMBSrvSession.java:1511)
at java.lang.Thread.run(Thread.java:595)

Only 20% of the files are processed before the problem occurs.

I operate that copy from a Window OS to an Alfresco 1.4 repository.

Are there some limitations in the CIFS usage ?

Thanks.

you are picking up 19 docs and dropping them in a cifs projection? can you identify that its the number of docs or one of the docs in particular?

greglenain

In that example, I've picked up 49 docs from a local filesystem and dropped them in a CIFS directory bound to my client files explorer.
And "only 20% of the files were processed".

Neither 49 nor 20% are magic numbers.

Sometimes, Alfresco may copy up to 30%, maybe 40% of the files.
But other times, the repo can't climb further than 15%.
And I can see no huge (or corrupted or evil) file hidden among the others.

Let's sum up: opposite to FTP, CIFS seems not to be able to stand the load.

Can users rely on CIFS ?

rdanner

In that example, I've picked up 49 docs from a local filesystem and dropped them in a CIFS directory bound to my client files explorer.
And "only 20% of the files were processed".

Neither 49 nor 20% are magic numbers.

Sometimes, Alfresco may copy up to 30%, maybe 40% of the files.
But other times, the repo can't climb further than 15%.
And I can see no huge (or corrupted or evil) file hidden among the others.

Let's sum up: opposite to FTP, CIFS seems not to be able to stand the load.

Can users rely on CIFS ?

The reliability of this interface is hugely important to me. Is there a response on this?

btorfs

Hi;
We have the same message in our alfresco logfiles when cifs crashes.
Is there any progress on this?

esanamr

We have the same problem.

If you solve it, please tell us.

Thanks in advance

gary_spencer

Hi,

We're trying to get hold of a packet trace from a site that has this problem as we're not able to reproduce the problem.

If you want to send an Ethereal packet trace to me it might help speed up sorting out a fix.

Cheers

Gary

gary_spencer

Hi,

After looking through the packet trace it seems the problem may be caused by an asynchronous notification that the CIFS server sends out when the new file is created.

The asynchronous notifications can be disabled on a per share basis by adding the following into the file-servers.xml, or custom file :-

    <filesystem name="…">
       <disableChangeNotification/>
       ..
       ..
    </filesystem>

Let us know if that fixes the problem, I'll then need to figure out why that notification packet is causing a problem.

Cheers

Gary

nkeide

Did anyone get this tweak to the file-servers.xml, or custom file to work with the community version of 1.4? It does not seem to make a difference for us.

steve

Hi,

Can you check your VM memory allocation - we have seen this issue where the default allocation of only 64MB is used.
You should see Alfresco print out some info at server startup about this.

If you are only running with a small amount, we recommend that you increase it to at least 512MB.

Hope this helps,

Steve

nkeide

Thanks. We tried it launching Alfresco with the following setting in the Alfresco.bat file:
set JAVA_OPTS=-Xms512m -Xmx768m -Xss1024k -server

It made no difference.

(The original setting was: set JAVA_OPTS=-Xms128m -Xmx512m -Xss64k -server)

We have the Win32NetBIOS.dll in the System32 folder (windows server 2000)

What was the fix that was made in 1.4E. Does it really work? (http://issues.alfresco.com/browse/AR-1181?decorator=printable)

gary_spencer

Hi,

How repeatable is the problem ?, is there a particular type of file that triggers the problem ?, have you tried using the <disableChangeNotification/> setting within the <filesystem> config block ?.

If I could get some network packet traces of this I might be able to pinpoint the problem.

Cheers

Gary

nkeide

Thanks.

1) Repeatable. Just pick a source directory with a bunch of files adding up to a few megs and try to copy it into a directory using the CIFS interface.
2) No file type seems worse than others.
3) <disableChangeNotification/> is set in file-servers-custom.xml as suggested above.

I am going to be out of the office until Monday. I'll send you a packet trace on Monday.

Thanks for your help!

nkeide

Gary,

I sent you packet traces by direct email.

Any help is greatly appreciated!

Thanks.
Norman.