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From "Thushara Wijeratna" <thu...@gmail.com>
Subject Re: [users@httpd] interaction btn apache and cronolog
Date Wed, 11 Oct 2006 15:46:37 GMT
Thanks Georgi, in my case there is only one virtual host, but of
course there are around 500 httpd child processes running and writing
into one cronolog.

That is the part that I couldn't quite grasp. When I do a ps auxww, I
see a cronolog process (just 1) all the time, so it sure looks like
all the httpd children are writing to this one cronolog process.

Tp avoid corruption, should we have one cronolog process for each
httpd child, instead?

Thushara

On 10/11/06, Georgi Chorbadzhiyski <gf@unixsol.org> wrote:
> Thushara Wijeratna wrote:
> > Can you recommend where I can read about the interaction btn apache
> > and cronolog? I have a problem in an apache server setup where the
> > output (created through cronolog) is corrupt. It sure looks like 2
> > processes were writing to the same file and one process overwrote the
> > other one.
> >
> > So I have lines in the output logs like this:
> >
> > CSID=L0CSID=C05504
> >
> > Here, it looks like a line starting CSID=L08956 got overwritten right
> > after the "0" character and the other process started writing
> > "CSID=C05504" to where the file ptr was.
> >
> > Not knowing the interaction btn cronolog and apache, it is hard for me
> > to debug this.
> >
> > I'm on apache 2.0.54, cronolog 1.6.2
>
> This may happen if two virtual hosts are piping logs trough cronolog
> and cronolog logs into the same file.
>
> Basically apache just opens the log program and writes requests to it
> no synchronization takes place. Make sure every cronolog instance writes
> to it's own file.
>
> --
> Georgi Chorbadzhiyski
> http://georgi.unixsol.org/
>
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