?
Solved

RHEL 5 locks up on CIFS error while shutting down

Posted on 2011-03-24
9
Medium Priority
?
540 Views
Last Modified: 2012-05-11
Hello All

While shutting down / restarting the RHEL 5 server, there is an error/message that comes up:

Unmounting CIFS filesystems: CIFS VFS: No response from cmd 50 mid 22517.

The system locks up for about 15 mins. Any reason and resolution for this problem?

Thanks
Ashish Dugar
0
Comment
Question by:sphaerapharma
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 6
  • 3
9 Comments
 
LVL 35

Expert Comment

by:Ernie Beek
ID: 35206130
0
 

Author Comment

by:sphaerapharma
ID: 35230398
Any reason why this problem occurs
0
 
LVL 35

Expert Comment

by:Ernie Beek
ID: 35230420
Simply put: the network is shut down before the unmount is finished. And no network: cannot unmount.
0
Put Machine Learning to Work--Protect Your Clients

Machine learning means Smarter Cybersecurity™ Solutions.
As technology continues to advance, managing and analyzing massive data sets just can’t be accomplished by humans alone. It requires huge amounts of memory and storage, as well as high-speed processing of the cloud.

 

Author Comment

by:sphaerapharma
ID: 35230501
Hi Erliebeee, thanks for reasoning out

In any manner can processed be reversed - the network shutdown happening after unmount is finished.

Problem is, I have about 19 mount points defined and it is a pain unmouting those points manually by using umount -l or umount -f command parameters before initiating system shutdown/reboot.

Thanks
Ashish
0
 
LVL 35

Expert Comment

by:Ernie Beek
ID: 35253822
Looks like this is an issue with the earlier kernel versions (cifs). So if you are able to, a kernel update might solve the issue.
0
 

Author Comment

by:sphaerapharma
ID: 35321482
Hello Erniebeek

The kernel version that is currently installed is 2.6.18-238.5.1.el5xen.

This looks like the current version.

Ashish
0
 

Author Comment

by:sphaerapharma
ID: 35351039
Hi all

Can anyone please help me out on this.

Thanks
Ashish
0
 

Accepted Solution

by:
sphaerapharma earned 0 total points
ID: 35734939
Please check whether the NetworkManager and network service been enabled at startup.

chkconfig | grep -i network

NetworkManager
0:off      1:off      2:off      3:on      4:on      5:on      6:off

network        
0:off      1:off      2:on      3:on      4:on      5:on      6:off


Please disable NetworkManager service at startup using following command

$chkconfig NetworkManager off

Verify using

$chkconfig --list | grep -i network

It should show as given below:

chkconfig --list | grep -i network

NetworkManager
0:off      1:off      2:off      3:off      4:off      5:off       6:off

network
0:off      1:off      2:on      3:on      4:on      5:on      6:off

For testing follow the steps given below

1. service NetworkManager stop

2. service network restart

3."ifconfig" should show NIC is up

4. mount the cifs share

5. shutdown the system and see whether you get the same message.

This should address the issue of CIFS locking up while reboot or shutdown.

Thanks
Ashish
0
 

Author Closing Comment

by:sphaerapharma
ID: 35763273
The exact problem has been pinpointed and resolved.

I unable to find any solution to this problem in any of the previously posted questions in the forum.
0

Featured Post

Bringing Advanced Authentication to the SMB Market

WatchGuard announces the acquisition of advanced authentication provider, Datablink, with one mission – to bring secure authentication to SMB, mid-market, and distributed enterprises with a cloud-based solution, ideal for resale via their established channel & MSSP community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction Many times we come across a slowness or instability between two hosts, and almost always we blame the poor networking guys, just because they're an easy target.  Sometimes we forget that other factors including disk bottlenecks, CPU …
Load balancing is the method of dividing the total amount of work performed by one computer between two or more computers. Its aim is to get more work done in the same amount of time, ensuring that all the users get served faster.
In this video we outline the Physical Segments view of NetCrunch network monitor. By following this brief how-to video, you will be able to learn how NetCrunch visualizes your network, how granular is the information collected, as well as where to f…
Michael from AdRem Software outlines event notifications and Automatic Corrective Actions in network monitoring. Automatic Corrective Actions are scripts, which can automatically run upon discovery of a certain undesirable condition in your network.…
Suggested Courses

765 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question