dhis2-devs team mailing list archive

[Orvalho Augusto <orvaquim@xxxxxxxxx>]

Thanks for help.

Postgres I will use if I do not have a solution.

I will try things on the connection pool.

One very important note:
I have used DHIS 2.01 for almost a year and never happened to have these
errors on the same Fedora Server as described before. I have tried some
snapshot versions and again never had this.
I jumped from 2.01 to 2.04 and I start with MySQL troubles.

Caveman


On Mon, Jul 5, 2010 at 10:20 AM, Bob Jolliffe <bobjolliffe@xxxxxxxxx> wrote:

> Hi Orvalho
>
> Whereas I do agree postgres might solve your problems it does seem
> like a drastic solution to this problem.  The fact is mysql does
> actually work and apparently work well so it should be possible to
> solve this.
>
> Trying to think logically here ... you have another similar setup
> where everything seems ok.  I suppose the load could be quite
> different on the two servers, but lets discount that for a bit.  If
> you are reusing old stale and broken connections then the only three
> places i can think to look are:
> (i)  the jdbc driver (version compatibility).  I think you checked that.
> (ii) tcp/ip problems
> (iii) the connection pool
>
> Regarding (ii) can you check the value of bind-address in
> /etc/mysql/my.cnf (or whatever config file you are using).  This
> should be set to 127.0.0.1 unless you are connecting to the db from a
> different host.  At least this interface will always be up so you
> shouldnt get intermittent network errors on it.
>
> Regarding (iii) I suggest (as above) that you look at setting up c3p0
> parameters to periodically test and discard stale connections.  Does
> anybody (maybe Indian team) have a good sample config?
>
> Regards
> Bob
>
> On 4 July 2010 13:09, Orvalho Augusto <orvaquim@xxxxxxxxx> wrote:
> > It will give some job because we developed a tool to convert data from
> one
> > database to MySQL.
> >
> > It is the only thing I can try to do to solve.
> >
> > Caveman
> >
> >
> >
> > On Sun, Jul 4, 2010 at 8:16 AM, Knut Staring <knutst@xxxxxxxxx> wrote:
> >>
> >> Is postgres out of the question?
> >>
> >> On Jul 4, 2010 5:59 AM, "Orvalho Augusto" <orvaquim@xxxxxxxxx> wrote:
> >>
> >> I do not know what to do. I have found this:
> >>
> >>
> http://dev.mysql.com/doc/refman/5.1/en/connector-j-usagenotes-troubleshooting.html
> >>
> >> And what makes me feel really bad is:
> >> "22.3.5.3.4: I have a servlet/application that works fine for a day, and
> >> then stops working overnight MySQL closes connections after 8 hours of
> >> inactivity. You either need to use a connection pool that handles stale
> >> connections or use the "autoReconnect" parameter"
> >>
> >> and
> >> "The autoReconnect facility is deprecated, and may be removed in a
> future
> >> release. "
> >>
> >>
> >> So what we do?
> >>
> >> Caveman
> >>
> >> On Mon, Jun 28, 2010 at 12:59 PM, Bob Jolliffe <bobjolliffe@xxxxxxxxx>
> >> wrote: > > Hi > > It looks...
> >>
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> >
> >
> >
>