linux-kernel - Re: Regression, bisected: sqlite locking failure on nfs

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Message-ID: <20101101181938.GA3875@elliptictech.com>
Date:	Mon, 1 Nov 2010 14:19:38 -0400
From:	Nick Bowler <nbowler@...iptictech.com>
To:	Chuck Lever <chuck.lever@...cle.com>
Cc:	LKML Kernel <linux-kernel@...r.kernel.org>,
	"J. Bruce Fields" <bfields@...hat.com>,
	Linux NFS Mailing List <linux-nfs@...r.kernel.org>
Subject: Re: Regression, bisected: sqlite locking failure on nfs

On 2010-11-01 14:07 -0400, Chuck Lever wrote:
> On Nov 1, 2010, at 1:58 PM, Nick Bowler wrote:
> > After installing 2.6.37-rc1, attempting to use sqlite in any capacity on
> > NFS gives a locking error:
> > 
> >  % echo 'select * from blah;' | sqlite3 blah.sqlite
> >  Error: near line 1: database is locked
> > 
> >  % echo 'create table blargh(INT);' | sqlite3 blargh.sqlite
> >  Error: near line 1: database is locked
> > 
> > The result is that a lot of high-profile applications which make use of
> > sqlite fail mysteriously.  Bisection reveals the following, and
> > reverting the implicated commit solves the issue:
> 
> Nick, thanks for the report.  Is 2.6.37-rc1 running on your clients or
> on your server?

Sorry for not being clear: the client is running 2.6.37-rc1.   The
server is running RHEL 5.5.

> Does anything interesting appear in the kernel log when your test case
> fails?

There are no unusual messages on the client... but I just logged into
the server and I see lots of messages of the following form:

  nfsd: request from insecure port (192.168.8.199:35766)!
  nfsd: request from insecure port (192.168.8.199:35766)!
  nfsd: request from insecure port (192.168.8.199:35766)!
  nfsd: request from insecure port (192.168.8.199:35766)!
  nfsd: request from insecure port (192.168.8.199:35766)!

(192.168.8.199 is the address of the failing client).  I can only assume
that these are a result of my recent issues, since I don't have access
to the system log (with timestamps) on that machine.

-- 
Nick Bowler, Elliptic Technologies (http://www.elliptictech.com/)
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