[Mono-list] Problem with 1.2.6

Fri Dec 28 08:43:49 EST 2007

Hi Ben,

What apache version you use?
Actually I had some kind of this error too in the past (but not sure was it
the same), I upgraded to apache 2.2(.6) and that problem went away. (that
was before I found that URL I mentioned.).
Previous apache version was 2.0.x
BTW
upgrade to apache 2.2 is more or less painful, if you are using lot of
modules (I am using gentoo linux)

Madars

On Dec 28, 2007 3:26 PM, Ben Clewett <ben at roadrunner.uk.com> wrote:

>
>
> Hi Madars, Marek and others,
>
> URL:
> http://lists.ximian.com/pipermail/mono-list/2007-September/036430.html
>
> Error:
> [crit] (17)File exists: Failed to create shared memory segment for
> backend 'XXGLOBAL'
>
> I have been playing with this problem some more.  I think the diagnostic
> in the URL you passed me may be wrong.
>
> There are memory segments owned by root which come and go with Apache.
> I start Apache as root, but it then spawns by the uid.conf:
>        User wwwrun
>        Group www
> This is unambiguous, should be owned by 'wwwrun' or 'root'?  Also, any
> which were not there before start of Apache seem to go after termination?
>
> However the other suggestion to re-boot the server makes no difference.
>  I get the reported error from a brand new boot.  This is therefore
> directly contradictory to the reported error:
>
> # uptime
>   1:22pm  up   0:02,  4 users,  load average: 0.65, 0.40, 0.16
>
> # ipcs -m
> ------ Shared Memory Segments --------
> key        shmid      owner      perms      bytes      nattch     status
>
> # /etc/rc.d/apache2 start
> Starting httpd2 (prefork)
> [Fri Dec 28 13:23:27 2007] [crit] (17)File exists: Failed to create
> shared memory segment for backend 'XXGLOBAL'
>
> Therefore I think this is still outstanding.
>
> This has been a problem for a long time.  It forces me to completely
> take a server off-line in order to start it.  This is a real pain.  (All
> our users loose their sessions and complain like a regiment of old
> ladies, and it takes me an hour to do a job which should take a few
> seconds.)  If there is anything I can do to assist the correction of
> this problem, please let me know!
>
> Ben
>
>
> Madars Vitolins wrote:
> > Hi,
> >
> > Check this
> > "http://lists.ximian.com/pipermail/mono-list/2007-September/036430.html"
> > Sound like releated with IPC.
> > "....
> >
> > You have two options at this point:
> >
> > - reboot the server
> > - use the ipcs -m command to list the shared memory segments and then
> ipcrm -m
> > shmid for each of the former apache segments (you can tell which
> belonged to
> >
> > apache by the owner - it will be the user apache runs as). Before
> removing the
> > segments, though, make sure that you stop apache. "
> >
> >
> > May be helps!
> >
> > Thanks,
> > Madars
> >
> > On Dec 21, 2007 11:22 AM, Ben Clewett <ben at roadrunner.uk.com
> > <mailto:ben at roadrunner.uk.com>> wrote:
> >
> >
> >
> >     Dear Mono,
> >
> >     I have just upgraded from 1.2.5 to 1.2.6.
> >
> >     The startup problem I was getting on 1.2.5 has now gone:
> >
> >     [Tue Sep 25 14:24:20 2007] [crit] Failed to remove dashboard file
> >     '/tmp/mod_mono_dashboard_XXGLOBAL_1', further actions impossible.
> >     Operation not permitted
> >
> >     Many thanks!  It was driving me mad as I had to take an entire
> server
> >     offline to upgrade Mono code.
> >
> >     However I now have a new startup problem:
> >
> >     [Fri Dec 21 09:18:28 2007] [crit] (17)File exists: Failed to create
> >     shared memory segment for backend 'XXGLOBAL'
> >
> >     This does not cause as many problems, but the mod_mono Control Panel
> >     does not work all the time.
> >
> >     Any ideas???
> >
> >     Thanks again,
> >
> >     Ben Clewett.
> >
> >
> >
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