On Mon, Aug 1, 2011 at 11:01 AM, Rudy Gevaert <[email protected]> wrote:
> I'm using Debian squeeze 64bit with snmpd 5.4.3~dfsg-2. > > On this system I'm running several Cyrus IMAP server instances. Every > cyrus instances is started to connect to a snmp agentx: > > snmp 7292 0.0 0.0 51596 4096 ? S Jul15 10:38 > /usr/sbin/snmpd -Lsd -Lf /dev/null -u snmp -I -smux -p > /var/run/snmpd-mail20.pid -x /var/agentx/mail20 --agentxperms=775 755 > root mail tcp:mail20.ugent.be > > The cyrus imap daemon's master process is (well was) configured to > connect to /var/agentx/mail[number] > > From time to time my cyrus master process vanishes! This leaves the > service unavailable. > > I have looked at this with a cyrus developper and looking at the > backtrace we see that the problem lies in the integration with snmp. > > (gdb) bt > #0 0x00007f4a56cd6013 in sendto () from /lib/libc.so.6 > #1 0x00007f4a5868b1ae in ?? () from /usr/lib/libnetsnmp.so.15 > #2 0x00007f4a5865ae6a in snmp_sess_async_send () from > /usr/lib/libnetsnmp.so.15 > #3 0x00007f4a58634c97 in snmp_synch_response_cb () from > /usr/lib/libnetsnmp.so.15 > #4 0x00007f4a58e8add7 in agentx_send_ping () from > /usr/lib/libnetsnmpagent.so.15 > #5 0x00007f4a58e7a889 in agentx_check_session () from > /usr/lib/libnetsnmpagent.so.15 > #6 0x00007f4a5867c4a4 in run_alarms () from /usr/lib/libnetsnmp.so.15 > #7 0x0000000000408999 in main (argc=<value optimized out>, argv=<value > optimized out>) at master.c:2221 > > You can find the source on > > http://git.cyrusimap.org/cyrus-imapd/tree/master/master.c?id=cyrus-imapd-2.4.10 > > The only thing else I can tell is that the crash happens very randomly. > I can't see any pattern. > > I would appreciate any help to further debug this. As we don't have any > snmp statistics for the time being. > Has this issue already been analyzed with Valgrind ? Bart.
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