Internal server error in 2.3.1 = mmap() problem?

[Alessandro Ren]

    I am also using tmpfs  to put some files, but just nagios files, 
like objects cache and status.log.
    I will try the new CVS and let you know what happens.

    []s.

Eli Stair wrote:
>
>
> After Alessandro's post last week, I confirmed my issue was due to 
> glomming the tmpfile onto a tmpfs space with all my other high-IO 
> RRD's, etc.  To confirm his posts, moving the file back to the same 
> local FS fixed the symptoms.
>
> I'll build the CVS vers. this week and try it with the file back on 
> the old filesystem, and post back.
>
> Thanks for your response Ethan.
>
> /eli
>
> -----Original Message-----
> From: nagios-devel-admin at lists.sourceforge.net on behalf of Ethan Galstad
> Sent: Sat 5/20/2006 12:59 PM
> To: Nagios-Devel
> Subject: Re: [Nagios-devel] Internal server error in 2.3.1 = mmap() 
> problem?
>
> Ethan Galstad wrote:
> > Aha!
> >
> > I was thinking that the recent patches to CVS might solve this problem,
> > but I doubt they will.  A little detective work revealed that a SIGBUS
> > interrupt may occur if the underlying file that is mmap()ed is
> > truncated.  Since the status file is updated regularly, its size may be
> > larger or smaller than it was previously, so this could be causing the
> > SIGBUS.
> >
> > Therefore I assume that I should *not* be mmap()ing the following files:
> > status, comment, and downtime.  Instead, I should be using the standard
> > fgets() calls.  Can anyone else chime in and verify my suspicion?  It
> > seems strange that more people have not reported errors, but the
> > implementation of mmap() across different systems may prevent this error
> > from occuring for others...
> >
>
> I have just committed patches to the 2.x and HEAD branches that remove
> the mmap() functionality for reading the status, comment, and downtime
> files, as I believe this might be the cause of problems.
>
> Alessandro and Eli - Could you test the latest CVS snapshot and see if
> the problem appears to be resolved?  You can grab the latest CVS
> snapshot at the following link:
>
> http://nagios.sourceforge.net/download/cvs/nagios-2-x-cvs.tar.gz
>
>
> Ethan Galstad,
> Nagios Developer
> ---
> Email: nagios at nagios.org
> Website: http://www.nagios.org
>
>
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