Re: Sometimes all the applications using sqlite do not work correctly

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On Mon, Apr 11, 2016 at 09:09:39PM +0200, YuGiOhJCJ Mailing-List wrote:
> On Fri, 8 Apr 2016 00:48:39 +0200
> YuGiOhJCJ Mailing-List <yugiohjcj-mailinglist@xxxxxxxxxxx> wrote:
> 
> > > So when the problem happens, restarting the server fixes the problem?
> > 
> > Indeed, that's it.
> > 
> > > It's probably the kernel version that's most important.  So it might be
> > > interesting to know what your kernel version was before and what it is
> > > now.
> > 
> > My Linux kernel was 3.18.20 before and is still 3.18.20 now.
> > I have not changed of kernel since the problem happens.
> > 
> > > Also: what's your NFS server?  Was it upgraded at the same time, or was
> > > only your client upgraded?
> > 
> > I have not upgraded the server and not upgraded the client.
> > They are still the same: nfs-utils-1.2.8.
> 
> It happened again today.
> 
> Output on mumble:
> $ mumble 
> CELT bitstream 8000000b from libcelt0.so.0.7.0
> CELT bitstream 80000010 from libcelt0.so.0.11.0
> Locale is "en_US" (System: "en_US")
> TextToSpeech: Compiled without support for speech-dispatcher
> SQL Query failed "CREATE TABLE IF NOT EXISTS `servers` (`id` INTEGER PRIMARY KEY AUTOINCREMENT, `name` TEXT, `hostname` TEXT, `port` INTEGER DEFAULT 64738, `username` TEXT, `password` TEXT)" 
...
> ALSAAudioInput: Releasing ALSA Mic.
> ALSAAudioOutput: Destroyed
> SQL Query failed "PRAGMA journal_mode = DELETE" 
> -1 "database is locked Unable to execute statement" 
> SQL Query failed "VACUUM" 
> -1 "database is locked Unable to fetch row"
> 
> Output on xmoto:
> $ xmoto 
> fatal exception : xmDb: database is locked
> 
> No Output on firefox but I am unable to show bookmarks which means that there is a problem to access the sqlite database.
> 
> I have just restarted the NFS server like that:
> $ bash /etc/rc.d/rc.nfsd restart
> 
> And the client works now perfectly again with applications using sqlite.
> 
> So I guess that there is a problem with the NFS server (not the client).
> Is there something I could check like processes running on the server when the problem happens?
> What information could be useful to understand what happens when I get the problem?

Are there any warnings in the client or server's logs?

--b.
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