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Problem - After a reboot, the *first* `mount -a -t nfs ' gets   stuck in `D '

Problem - After a reboot, the *first* `mount -a -t nfs ' gets   stuck in `D '

2006-09-07       - By Keith Lewis

 Back
RE:
> Have you troubleshot the basics?

  Yep.  First things I checked.

> netstat -in
> Verify error count is 0.

client 1
# netstat -in
Kernel Interface table
Iface       MTU Met    RX-OK RX-ERR RX-DRP RX-OVR    TX-OK TX-ERR TX-DRP TX-OVR
Flg
eth0       1500   0  3343820      0      0      0  3078040      0      0      0
BMRU
lo        16436   0     8930      0      0      0     8930      0      0      0
LRU
#

client 2
# netstat -in
Kernel Interface table
Iface       MTU Met    RX-OK RX-ERR RX-DRP RX-OVR    TX-OK TX-ERR TX-DRP TX-OVR
Flg
eth0       1500   0   657413      0      0      0  1067736      0      0      0
BMRU
lo        16436   0    55138      0      0      0    55138      0      0      0
LRU
#

nfs server 1 (been up for months)
# netstat -in
Kernel Interface table
Iface       MTU Met    RX-OK RX-ERR RX-DRP RX-OVR    TX-OK TX-ERR TX-DRP TX-OVR
Flg
eth0       1500   0 3001317645      0      0      0 3616224851      0      0  
  0 BMRU
lo        16436   0 1015411515      0      0      0 1015411515      0      0  
  0 LRU
#

nfs server 2
$ netstat -in
Kernel Interface table
Iface       MTU Met    RX-OK RX-ERR RX-DRP RX-OVR    TX-OK TX-ERR TX-DRP TX-OVR
Flg
eth0       1500   0 600381384      0      0      0 601422342      0      0    
0 BMRU
lo        16436   0 366832146      0      0      0 366832146      0      0    
0 LRU


> ethtool <int>

  all are autonegotiated to 1000 full.  

> Verify speed and duplex on the NIC and switch side are the same.

  Good point.  I checked the node end.  Our NIS people are very good.  They
would tell me if the switches were getting errors - esp since I pestered them.

  I've also done things like `ping -s <various sizes> server' from the
client and leftit running during the failed and working mount attempts.  Didn't
see anything noteworthy.  Turning off iptables didn't help.  Posting to this
list has been good tho!

> /Brian/

  btw, we have been running for years with this setup.  Never any problem
even remotely like this in the past.  Then we had the problem two nights in a
row, then last night we didn't.  (The only changes to software on these boxes
are done with up2date -u).

Keith

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