QDisk ping heuristic timing out even though it uses a -w deadline in RHEL 5 or 6 High Availability cluster

Solution In Progress - Updated -

Issue

  • QDisk ping heuristic timing out even though it uses a -w deadline in RHEL 5
Heuristic: 'ping -w4 -c3 -t2 10.96.66.1' DOWN - Exceeded timeout of 10 seconds
  • cluster node gets rebooted by qdiskd after the ping heuristic fails.

Environment

  • Red Hat Enterprise Linux (RHEL) 5 with the High Availability Add On
  • Cluster utilizing a quorum disk (<quorumd> tag in /etc/cluster/cluster.conf)
  • Ping heuristic in /etc/cluster/cluster.conf that uses -w
<quorumd device="/dev/mapper/mpath6p1" interval="5" min_score="1" tko="3" votes="1" log_level="7" log_facility="local4">
        <heuristic interval="2" program="ping -w4 -c3 -t2 10.96.66.1" score="1" tko="4"/>
</quorumd>
  • If the ping heuristic does not already use the -w option, see this solution.

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