this doesn't seem to be a segfault, but the server that received a kill signal... could you be getting out of memory errors ?
-- thomas On Tue, Mar 7, 2017 at 8:18 AM Pieter Callewaert < [email protected]> wrote: > Thanks Andreas, you brought me on a lead, indeed the ulimit for core size > was on 0. Also it seems ubuntu running apport does not generate coredumps, > had to change the core pattern. > > I've a core dump now, checked with GDB, but not sure what I'm searching > at... > http://pastebin.com/fAXdEg15 > > Kind regards, > Pieter C > > -----Original Message----- > From: Eichner, Andreas - SID [mailto:[email protected]] > Sent: Monday, 6 March, 2017 15:40 > To: Pieter Callewaert <[email protected]>; > [email protected] > Subject: AW: [mapserver-users] Mapcache segmentation faults under high load > > Hi Pieter, > > have you checked the ulimit for the user the Apache runs under? See man > core(5) for possible reasons why no core is dumped. > > HTH > > > -----Ursprüngliche Nachricht----- > > Von: mapserver-users [mailto:[email protected]] > > Im Auftrag von Pieter Callewaert > > Gesendet: Montag, 6. März 2017 11:01 > > An: [email protected] > > Betreff: Re: [mapserver-users] Mapcache segmentation faults under high > > load > > > > Hi Thomas, > > > > > > > > The documentation for debug compiling is not complete > > (http://mapserver.org/mapcache/install.html > > <http://mapserver.org/mapcache/install.html> ). > > > > If I add -DCMAKE_BUILD_TYPE="Debug" to the cmake, it this enough? > > > > Also added CoreDumpDirectory /tmp/apache2-gdb-dump to apache2.conf, > > and now I see this in the error log: > > > > > > > > [Thu Mar 02 08:46:42.588518 2017] [core:notice] [pid 13:tid > > 140052444931968] AH00051: child pid 14 exit signal Segmentation fault > > (11), possible coredump in /tmp/apache2-gdb-dump > > > > [Thu Mar 02 08:46:55.606507 2017] [core:notice] [pid 13:tid > > 140052444931968] AH00051: child pid 2097 exit signal Segmentation > > fault (11), possible coredump in /tmp/apache2-gdb-dump > > > > > > > > Unfortunately, no dumps yet, so I’m afraid I did something wrong with > > the debug compiling. > > > > > > > > Kind regards, > > > > Pieter C > > > > > > > > From: thomas bonfort [mailto:[email protected]] > > Sent: Wednesday, 1 March, 2017 09:33 > > To: Pieter Callewaert <[email protected]>; mapserver- > > [email protected] > > Subject: Re: [mapserver-users] Mapcache segmentation faults under high > > load > > > > > > > > Try to get a backtrace from the crashes by compiling mapcache in debug > > mode, and configuring apache to allow coredumps. The "stale lock" > > messages you are seeing are side effects of the crashes so that's not > > where I'd investigate at first. > > > > > > > > regards, > > > > thomas > > > > > > > > > > _______________________________________________ > mapserver-users mailing list > [email protected] > https://lists.osgeo.org/mailman/listinfo/mapserver-users
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