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Full Discussion: After umount -lf: kernel: nfs: server HOSTNAME not responding, timed out
Operating Systems Linux Red Hat After umount -lf: kernel: nfs: server HOSTNAME not responding, timed out Post 302659395 by Arsene Lupen on Wednesday 20th of June 2012 11:19:58 PM
Old 06-21-2012
After umount -lf: kernel: nfs: server HOSTNAME not responding, timed out
Greetings!

I'm testing a failover solution for NFSv4 on RHEL6 with latest updates.
My script umounts (umount -lf /share) the faulty NFS share if it sees that's hanging on the client (the NFS daemon is down on the NFS server) and it mounts the share from another healthy NFS server.

Sometimes I can see that a process/thread is still in the memory and producing the messages in the $SUBJ - 'kernel: nfs: server SERVER not responding, timed out'
I already have the new healthy NFS share from another server and 'nfsstat -m' shows that this is the only share on the NFS client system.

I've tested the following commands to find the stacked process/thread:
  • lsof -i | egrep 'SERVER|SERVER_IP'
  • lsof +d /share
  • fuser -fvm /share
  • netstat -anop | egrep 'SERVER|SERVER_IP
  • ... and a couples of others with lsof.. but no PID.
Thread? ..the ps command thread related options don't show IP addresses/host names.. But the kernel is continuously logging the error.

Any suggestion is welcome to detect it.

Thank you Arsene
 

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LEARN ABOUT DEBIAN

actdiag

ACTDIAG(1)						      General Commands Manual							ACTDIAG(1)

NAME

       actdiag - generate activity-diagram image file from spec-text file.

SYNOPSIS

       actdiag [options] files

DESCRIPTION

       This manual page documents briefly the actdiag commands.

       actdiag is a program that generate activity-diagram image file from spec-text file.

OPTIONS

       These  programs	follow	the  usual  GNU  command  line	syntax, with long options starting with two dashes (`-').  A summary of options is
       included below.	For a complete description, see the Info files.

       -h, --help
	      show this help message and exit

       -a, --antialias
	      Pass diagram image to anti-alias filter

       -c FILE, --config=FILE
	      read configurations from FILE

       -o FILE
	      write diagram to FILE

       -f FONT, --font=FONT
	      use FONT to draw diagram

       -s, ----separate
	      Separate diagram images for each group (SVG only)

       -T TYPE
	      Output diagram as TYPE format

SEE ALSO

       The programs are documented fully by
       http://tk0miya.bitbucket.org/actdiag/build/html/index.html

AUTHOR

       actdiag was written by Takeshi Komiya <i.tkomiya@gmail.com>

       This manual page was written by Kouhei Maeda <mkouhei@palmtb.net>, for the Debian project (and may be used by others).

								   June  5, 2011							ACTDIAG(1)
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