PowerDNS server hangs frequently and does not update DNS zones until the pdns service is manually restarted.
/var/log/messages contains the following:
hsp pdns: Got a signal 11, attempting to print trace: hsp pdns: [0x4732b0] hsp pdns: [0x625290] hsp pdns: Our pdns instance (14516) exited after signal 6
OBAS is running inside a Virtuozzo container.
Signal 11 is
SIGSEGV - "Invalid memory reference".
Check User Beancounters inside OBAS container:
[root@OBASct ~]# cat /proc/user_beancounters
failcntequal to zero for all resources, the issue can be caused by the physical memory troubles.
failcntfor some resources is not equal to zero, please increase appropriate limits using the following command on the Virtuozzo node:
[root@VZnode ~]# vzctl set <ct_id> --save --<recource_name> NEW_BARRIER:NEW_LIMIT
<ct_id>is the ID of the OBAS container, and
<resource_name>is the name of resource that have non-zero
- Check physical memory with some testing tool like Memtest86+