Re: [Nbd] nbd hanging doing an svnadmin hotcopy
- To: nbd-general@lists.sourceforge.net
- Subject: Re: [Nbd] nbd hanging doing an svnadmin hotcopy
- From: Eric Gerlach <egerlach@...135...>
- Date: Sat, 25 Aug 2007 00:27:23 -0400
- Message-id: <46CFAFAB.9050001@...135...>
- In-reply-to: <46CFAC5E.4090704@...135...>
- References: <46CF518F.6000602@...135...> <46CFAC5E.4090704@...135...>
Okay, I have learned another way to find out what the process is waiting
on, namely getting ps to output the WCHAN field using the -o option.
Now that I've done that, I see kjournald is hung on sync_buffer, and
svnadmin is hung on sync_page.
Is there any known problems with using nbd with journaled filesystems?
Sorry for cluttering up the list like this, but I figure if I post
everything i know, maybe that will help someone else in the future.
Cheers,
Eric
Eric Gerlach wrote:
About an hour and a half after it froze it started going again, but then
froze on the next repository (it's a batch job that backs up all the
repositories), and has been frozen for the last six hours or so. Now
svnadmin is stuck in a different place, though nbd-client seems to be in
roughly the same place....
Again, if there's anyone out there who can offer a pointer (or where
more pertinent data could be found), it would be much appreciated.
>
Eric Gerlach wrote:
Hi,
I'm testing out using nbd to host svn repositories because nfs doesn't
work. However, when tyring to do an svnadmin hotcopy the whole thing
has hung. I can't even kill -9 the processes involved, so I'm assuming
it's in the kernel.
I thought it might be a TCP timeout issue, so I've waited long past the
15 minute TCP timeout (read that somewhere), but not one bit has changed
in the call traces of the processes during that time.
It's a Debian Etch system, running the latest (2.6.18-5) kernel with
nbd-client 2.8.7 userland. I've pulled the call traces of the offending
process if that helps anyone. If I'm asking for help in the wrong
place, let me know so I can try there. However if anyone has any
experience with this, it would be greatly appreciated.
Thanks very much in advance for your help.
Cheers,
Eric
--
Eric Gerlach, Network Administrator
Federation of Students
University of Waterloo
p: (519) 888-4567 x36329
e: egerlach@...135...
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