Re: Still getting NFS client locking up

[Tim Middleton]

On November 11, 2003 11:36 pm, Janet Sullivan wrote:
> So far I only have problems in a mixed -STABLE/-CURRENT environment.
> When the client & server are both -CURRENT I haven't had any problems.

I just installed another -STABLE box to see if keeping them both -STABLE 
helps. I haven't really tested the NFS yet as I didn't want to risk locking 
the box up in the middle of a buildworld. 

So i just mounted the NFS drive on the new test box and left it 
Within an hour the NFS server box doing the build world was locked up solid. I 
can't say if it was NFS mount related or not; nfsd wasn't really doing 
anything. Doesn't seem like it would have been. Beginning to wonder if it is 
some strange hardware problem on this box; which coincidentally only shows up 
when there's an nfs mount! But that doesn't explain why my normally rock 
solid desktop system tanked when being tested as an NFS client to that STABLE 
box. Hmmm... 

Back to testing.  I'm doing heavy disk I/O tests without any NFS mounts now. 
If they go okay, back to the NFS mounting and testing...

It seems to me there is something desperately wrong with NFS is mixing 
-CURRENT and -STABLE NFS server/clients causes either side (in my case both 
sides) to lock up solid. I mean, problems are problems... but solid lockups 
with no crash messages or anything is ... nasty.

> Are the folks seeing hangs getting any kind of console error messages?

I see nothing. My server is completely locks up. Nothing responds. The drive 
light (the times i've noticed) is frozen "on". On my desktop box the mouse is 
dead as well. 

> I don't see anything - performance just tanks to the point of being
> unusable.

When testing with my desktop box as client, i noticed just before or just when 
the NFS locked up the mouse and keyboard response would be very erratic ... 
slow and jerky. 

-- 
Tim Middleton | Cain Gang Ltd | "Who is Ungit?" said he, still holding
[EMAIL PROTECTED] | www.Vex.Net   | my hands. --C.S.Lewis (TWHF)


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Re: Still getting NFS client locking up

[Tim Middleton]

On November 10, 2003 12:44 pm, Soren Schmidt wrote:
> For me its just the server end that fails, I've not seen the client hang.

I'm having a bad NFS day... not sure if it is the same lockups described in 
this thread. In fact perhaps I'm posting to the wrong group since the server 
in questoin is 4.9-STABLE. The client I am testing with is 5.1-CURRENT 
(though a few months old) however. 

I'm trying to make sure this server is stable, as it took a long time to get 
my company to let me switch one of the servers to FreeBSD... things were 
going great until i started testing NFS... now they are going very badly.

I can lock the NFS server up every time simply by mounting the nfs partition 
(i'm using -t for tcp nfs and exporting with -maproot=0:0), and then running 
"iozone -a" on the nfs client box. It takes a while, but the 4.9-RELEASE box 
will always lock up solid eventually. Not good. )-:

I've done tests as root and non-root. Sometimes i can rescue the nfs client 
box with a "mount -f", but sometimes the client box has locked up solid as 
well when I've tried that. 

The server is a P3-1ghz Intel STL2 box, with 1 gig of ram. Using the onboard 
fxp ethernet at 100baseTX. It is not using dhcp. Nothing much else is running 
on this server box as I'm just testing it. When the server locks the box can 
not even be pinged.

Since the box locks up solid its hard to see what may be going on. I have left 
top running to see what it says when it freezes, but it may not be accurate 
depending on when it last refreshed. But for the record it has nfsd in 
"biorw" state.

I tried dumping ps -lax to a file every few seconds while testing... that 
didn't work very well as again the refresh is too slow, and the drive loses 
the last few files when it goes down. Perhaps I can turn off caching or soft 
updates or something to help with this (as you may tell, i'm not a file 
systme expert --- any suggestions, welcome). 

Maybe I should set up another box and test 4.9-RELEASE to 4.9-RELEASE... 
and/or update my 5.1-CURRENT box for further testing... 

-- 
Tim Middleton | Cain Gang Ltd | One afternoon, disgusted, bravo, you fall 
[EMAIL PROTECTED] | www.Vex.Net   | asleep. --T.Lilburn (MS)


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