Cluster doesn't fence when quorum is lost

Solution Verified - Updated -

Issue

  • We have configured the quorum disk as per best practices in tech brief How to Optimally Configure a Quorum Disk, but while disconnecting the fiber channel cables from one of the servers, the cluster detects the quorum is lost, but no fence occurs.

  • After following messages, cluster node gets hung but qdisk on another node does not evict the affected node which had lost connection with fiber channel devices:

    Jul 14 12:00:51 node1 kernel: sd 2:0:0:0: SCSI error: return code = 0x00010000
Jul 14 12:00:51 node1 multipathd: sdw: directio checker reports path is down 
Jul 14 12:00:51 node1 multipathd: sdx: directio checker reports path is down 
Jul 14 12:00:51 node1 kernel: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK,SUGGEST_OK
[...]

Environment

  • Red Hat Enterprise Linux 5, 6 with High Availability Add-Ons
  • Quorum disk.
  • DM-Multipath configured with queue_if_no_path option.

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