[Mono-list] Problem with 1.2.6

Ben Clewett ben at roadrunner.uk.com
Fri Dec 28 10:10:00 EST 2007



Madars,

I am on 2.2.4.  Well the least I can do is try 2.2.6 and see if the 
problem does go away.  Thanks for the advise.

Ben

Madars Vitolins wrote:
> 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 
> <mailto: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
>     <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>
>      > <mailto: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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