pdns instance crashes

[anon]

OS = Red Hat Enterprise Linux Server release 5.1 (Tikanga) PowerDNS version = pdns-2.9.22rc4-1

PowerDNS instance crashes randomly.

Attaching the Trace Reports.

Oct 26 16:58:36 lotr pdns[20444]: 50039 questions waiting for database attention. Limit is 50000, respawning
Oct 26 16:58:36 lotr pdns[20444]: Got a signal 11, attempting to print trace: 
Oct 26 16:58:36 lotr pdns[20444]: /usr/local/sbin/pdns_server-instance [0x48e666]
Oct 26 16:58:36 lotr pdns[20444]: /lib64/libc.so.6 [0x3b45a301b0]
Oct 26 16:58:36 lotr pdns[20444]: /usr/local/sbin/pdns_server-instance(_ZN11PacketCache7cleanupEv+0x144) [0x469bc4]
Oct 26 16:58:36 lotr pdns[20444]: /usr/local/sbin/pdns_server-instance(_ZN11PacketCache3getEP9DNSPacketS1_+0x195) [0x46acf5]
Oct 26 16:58:36 lotr pdns[20444]: /usr/local/sbin/pdns_server-instance(_Z7qthreadPv+0x8d7) [0x4cc067]
Oct 26 16:58:36 lotr pdns[20444]: /lib64/libpthread.so.0 [0x35094062f7]
Oct 26 16:58:36 lotr pdns[20444]: /lib64/libc.so.6(clone+0x6d) [0x3b45ad1b6d]
Oct 26 16:58:37 lotr pdns[4387]: Our pdns instance (20444) exited after signal 6
Oct 26 16:58:37 lotr pdns[4387]: Respawning

Oct 25 16:45:39 lotr pdns[4401]: Got a signal 11, attempting to print trace: 
Oct 25 16:45:39 lotr pdns[4401]: /usr/local/sbin/pdns_server-instance [0x48e666]
Oct 25 16:45:39 lotr pdns[4401]: /lib64/libc.so.6 [0x3b45a301b0]
Oct 25 16:45:39 lotr pdns[4401]: /usr/local/sbin/pdns_server-instance(_ZN11PacketCache7cleanupEv+0x1f6) [0x469c76]
Oct 25 16:45:39 lotr pdns[4401]: /usr/local/sbin/pdns_server-instance(_ZN11PacketCache3getEP9DNSPacketS1_+0x195) [0x46acf5]
Oct 25 16:45:39 lotr pdns[4401]: /usr/local/sbin/pdns_server-instance(_ZN13TCPNameserver12doConnectionEPv+0x352) [0x463d92]
Oct 25 16:45:39 lotr pdns[4401]: /lib64/libpthread.so.0 [0x35094062f7]
Oct 25 16:45:39 lotr pdns[4401]: /lib64/libc.so.6(clone+0x6d) [0x3b45ad1b6d]
Oct 25 16:45:40 lotr pdns[4387]: Our pdns instance (4401) exited after signal 6
Oct 25 16:45:40 lotr pdns[4387]: Respawning
==================================================================================================================================================

Oct 26 06:09:19 navi pdns[20425]: 50050 questions waiting for database attention. Limit is 50000, respawning
Oct 26 06:09:20 navi pdns[20425]: Got a signal 11, attempting to print trace: 
Oct 26 06:09:20 navi pdns[20425]: /usr/local/sbin/pdns_server-instance [0x48e666]
Oct 26 06:09:20 navi pdns[20425]: /lib64/libc.so.6 [0x35132300b0]
Oct 26 06:09:20 navi pdns[20425]: /usr/local/sbin/pdns_server-instance(_ZN11PacketCache7cleanupEv+0x144) [0x469bc4]
Oct 26 06:09:20 navi pdns[20425]: /usr/local/sbin/pdns_server-instance(_ZN11PacketCache3getEP9DNSPacketS1_+0x195) [0x46acf5]
Oct 26 06:09:20 navi pdns[20425]: /usr/local/sbin/pdns_server-instance(_Z7qthreadPv+0x8d7) [0x4cc067]
Oct 26 06:09:20 navi pdns[20425]: /lib64/libpthread.so.0 [0x3513e062f7]
Oct 26 06:09:20 navi pdns[20425]: /lib64/libc.so.6(clone+0x6d) [0x35132ce85d]
Oct 26 06:09:20 navi pdns[4178]: Our pdns instance (20425) exited after signal 6
Oct 26 06:09:20 navi pdns[4178]: Respawning

Oct 26 08:55:48 navi pdns[30443]: 50023 questions waiting for database attention. Limit is 50000, respawning
Oct 26 08:55:48 navi pdns[30443]: Got a signal 11, attempting to print trace: 
Oct 26 08:55:48 navi pdns[30443]: Got a signal 11, attempting to print trace: 
Oct 26 08:55:48 navi pdns[30443]: /usr/local/sbin/pdns_server-instance [0x48e666]
Oct 26 08:55:48 navi pdns[30443]: /lib64/libc.so.6 [0x35132300b0]
Oct 26 08:55:48 navi pdns[30443]: /lib64/libc.so.6(memcpy+0x37) [0x3513277b37]
Oct 26 08:55:48 navi pdns[30443]: /usr/lib64/libstdc++.so.6(_ZNSs4_Rep8_M_cloneERKSaIcEm+0x50) [0x3515e9c270]
Oct 26 08:55:48 navi pdns[30443]: /usr/lib64/libstdc++.so.6(_ZNSsC1ERKSs+0x4f) [0x3515e9c96f]
Oct 26 08:55:48 navi pdns[30443]: /usr/local/sbin/pdns_server-instance(_ZNK5QType7getNameEv+0x7f) [0x4440ef]
Oct 26 08:55:48 navi pdns[30443]: /usr/local/sbin/pdns_server-instance(_ZN11GSQLBackend6lookupERK5QTypeRKSsP9DNSPacketi+0x363) [0x4ed553]
Oct 26 08:55:48 navi pdns[30443]: /usr/local/sbin/pdns_server-instance(_ZN10DNSBackend6getSOAERKSsR7SOADataP9DNSPacket+0x4f) [0x4752df]
Oct 26 08:55:48 navi pdns[30443]: /usr/local/sbin/pdns_server-instance(_ZN12UeberBackend6getSOAERKSsR7SOADataP9DNSPacket+0xb0) [0x49a910]
Oct 26 08:55:48 navi pdns[30443]: /usr/local/sbin/pdns_server-instance(_ZN13PacketHandler7getAuthEP9DNSPacketP7SOADataRKSsPi+0x38) [0x44f838]
Oct 26 08:55:48 navi pdns[30443]: /usr/local/sbin/pdns_server-instance(_ZN13PacketHandler17questionOrRecurseEP9DNSPacketPb+0x13f6) [0x456b56]
Oct 26 08:55:48 navi pdns[30443]: /usr/local/sbin/pdns_server-instance(_ZN13PacketHandler8questionEP9DNSPacket+0x20) [0x45a290]
Oct 26 08:55:48 navi pdns[30443]: /usr/local/sbin/pdns_server-instance(_ZN11DistributorI9DNSPacketS0_13PacketHandlerE10makeThreadEPv+0x350) [0x4d02c0]
Oct 26 08:55:48 navi pdns[30443]: /lib64/libpthread.so.0 [0x3513e062f7]
Oct 26 08:55:48 navi pdns[30443]: /lib64/libc.so.6(clone+0x6d) [0x35132ce85d]
Oct 26 08:55:49 navi pdns[4178]: Our pdns instance (30443) exited after signal 6
Oct 26 08:55:49 navi pdns[4178]: Respawning

[anon]

Trace Reports

[ahu]

Probably due to database overload.