"stonith-ng[xxx]: notice: [cib_diff_notify] Patch aborted: Application of an update diff failed (-206)" messages in pacemaker cluster.

Issue

• "stonith-ng[xxx]: notice: [cib_diff_notify] Patch aborted: Application of an update diff failed (-206)" messages in pacemaker cluster.
• After adding stonith agent`fence_ilo4_ssh' one of the node is rebooted with the below messages. In the below example, node2 was rebooted.

Nov 25 11:20:01 node2 systemd: Started Session 891 of user root.
Nov 25 11:22:39 node2 stonith-ng[3951]:   notice: [cib_diff_notify] Patch aborted: Application of an update diff failed (-206)
Nov 25 11:22:39 node2 stonith-ng[3951]:   notice: On loss of CCM Quorum: Ignore
Nov 25 11:22:40 node2 stonith-ng[3951]:   notice: Added 'fence_node2_ilo' to the device list (2 active devices)
Nov 25 11:22:40 node2 stonith-ng[3951]:  notice: On loss of CCM Quorum: Ignore
Nov 25 11:22:40 node2 stonith-ng[3951]:   notice: Added 'fence_node1_ilo' to the device list (3 active devices) 
Nov 25 11:22:49 node2 stonith-ng[3951]:   notice: scsi can fence (on) node2hb: static-list
Nov 25 11:22:49 node2 stonith-ng[3951]:   notice: fence_node2_ilo can not fence (on) node1hb: static-list
Nov 25 11:22:49 node2 stonith-ng[3951]:  notice: scsi can fence (on) node2hb: static-list
Nov 25 11:22:49 node2 stonith-ng[3951]:   notice: fence_node1_ilo can fence (on) node1hb: static-list
Nov 25 11:22:49 node2 stonith-ng[3951]:  notice: fence_node2_ilo can not fence (on) node1hb: static-list
Nov 25 11:22:49 node2 stonith-ng[3951]:  notice: fence_node1_ilo can fence (on) node1hb: static-list
Nov 25 11:22:49 node2 stonith-ng[3951]:   notice: fence_node2_ilo can not fence (on) node1hb: static-list
Nov 25 11:22:49 node2 stonith-ng[3951]:   notice: fence_node1_ilo can fence (on) node1hb: static-list
Nov 25 11:22:49 node2 stonith-ng[3951]:  notice: fence_node2_ilo can not fence (on) node1hb: static-list
Nov 25 11:22:49 node2 stonith-ng[3951]:  notice: fence_node1_ilo can fence (on) node1hb: static-list
Nov 25 11:23:01 node2 systemd-logind[1807]: Power key pressed.      
Nov 25 11:23:01 node2 systemd-logind[1807]: Powering Off...
Nov 25 11:23:01 node2 systemd-logind: Power key pressed.
Nov 25 11:23:01 node2 systemd-logind[1807]: System is powering down.
Nov 25 11:23:01 node2 systemd-logind: Powering Off...
Nov 25 11:23:01 node2 systemd-logind: System is powering down.
Nov 25 11:23:01 node2 systemd[1]: Stopping Session 887 of user root.


Nov 25 11:22:30 node1 crmd[2890]:  notice: State transition S_TRANSITION_ENGINE -> S_IDLE [ input=I_TE_SUCCESS cause=C_FSA_INTERNAL origin=notify_crmd ]
Nov 25 11:22:39 node1 crmd[2890]:   notice: State transition S_IDLE -> S_POLICY_ENGINE [ input=I_PE_CALC cause=C_FSA_INTERNAL origin=abort_transition_graph ]
Nov 25 11:22:39 node1 crmd[2890]:  notice: State transition S_IDLE -> S_POLICY_ENGINE [ input=I_PE_CALC cause=C_FSA_INTERNAL origin=abort_transition_graph ]
Nov 25 11:22:39 node1 stonith-ng[2886]:   notice: [cib_diff_notify] Patch aborted: Application of an update diff failed (-206)
Nov 25 11:22:39 node1 pengine[2889]:   notice: On loss of CCM Quorum: Ignore
Nov 25 11:22:39 node1 stonith-ng[2886]:  notice: On loss of CCM Quorum: Ignore
Nov 25 11:22:39 node1 stonith-ng[2886]:  notice: Added 'fence_node2_ilo' to the device list (2 active devices)
Nov 25 11:22:39 node1 pengine[2889]:   notice: Unfencing node1hb: node discovery
Nov 25 11:22:39 node1 pengine[2889]:   notice: Unfencing node2hb: node discovery
Nov 25 11:22:39 node1 pengine[2889]:   notice: Restart vg02-database#011(Started node1hb)
Nov 25 11:22:39 node1 pengine[2889]:   notice: Restart vg03-redo#011(Started node1hb)
Nov 25 11:22:39 node1 pengine[2889]:   notice: Restart vg04-export#011(Started node1hb)