Article ID: 128784, created on Apr 30, 2016, last review on Apr 30, 2016

  • Applies to:
  • Odin Business Automation Standard 4.5

Symptoms

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[14516]: Got a signal 11, attempting to print trace:
hsp pdns[14516]: [0x4732b0]
hsp pdns[14516]: [0x625290]
hsp pdns[22917]: Our pdns instance (14516) exited after signal 6

OBAS is running inside a Virtuozzo container.

Cause

Signal 11 is SIGSEGV - "Invalid memory reference".

  1. Check User Beancounters inside OBAS container:

    [root@OBASct ~]# cat /proc/user_beancounters
    
  2. If failcnt equal to zero for all resources, the issue can be caused by the physical memory troubles.

Resolution

  1. If failcnt for 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
    

    where <ct_id> is the ID of the OBAS container, and <resource_name> is the name of resource that have non-zero failcnt

  2. Check physical memory with some testing tool like Memtest86+

Search Words

Our pdns instance exited after signal 6

Got a signal 11

signall 11

pdns hangs

624ca542e40215e6f1d39170d8e7ec75 caea8340e2d186a540518d08602aa065 400e18f6ede9f8be5575a475d2d6b0a6 70a5401e8b9354cd1d64d0346f2c4a3e

Email subscription for changes to this article
Save as PDF