Why does Master of `SAPHana` failover when hana_sid_roles value `124:P::::` is detected?

Solution Verified - Updated -

Issue

  • An unexpected failover of the SAP Hana resource in a Pacemaker cluster happened suddenly
  • Why the SAPHana resource failed over between the nodes suddenly if there are no problems reported on the server?

  • Why when value forhana_sid_roles attribute changed to 124:P::::, then SAPHana resource shortly after failover to another node?

    attrd:     info: attrd_peer_update:     Setting hana_sid_roles[node2]: 4:P:master1:master:worker:master -> 124:P:::: from node2
attrd:     info: attrd_peer_update:     Setting master-SAPHana_SID_02[node2]: 150 -> 0 from node2

Environment

  • Red Hat Enterprise Linux 7 with High-Availability Add-on
  • running pacemaker cluster with SAPHana and SAPHanaTopology resources
  • SAPHana resource has attribute PREFER_SITE_TAKEOVER=true

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