1つ以上のアグリゲートのギブバック処理がロックマネージャによって拒否されました

環境

• ONTAP 9
• ONTAP Select
• Cloud Volumes ONTAP for Azure の略
• Cloud Volumes ONTAP for AWS
• Cloud Volumes ONTAP for GCPの略

問題

• ノードのリブート後、一方のデータアグリゲートがホームノードに戻りません。

::> storage failover show
                Takeover
Node       Partner     Possible State Description
-------------- -------------- -------- -------------------------------------
node1       node2       true    Connected to node2
node2       node1       true    Connected to node1, Giveback of
                             one or more SFO aggregates failed
2 entries were displayed.

• Lock_managerによってSFO（ストレージフェイルオーバー）が拒否されたため、ノードが部分的なギブバック状態になっています。

::> storage failover show-giveback
        Partner
Node       Aggregate      Giveback Status
-------------- ----------------- ---------------------------------------------
node1
                 No aggregates to give back
node2
        CFO Aggregates   Done
        aggr_node1     Failed: Operation was vetoed by
                 lock_manager. Giveback failed during lock
                 manager veto checks or the pre-commit phase.
                 For veto failures, use the "vserver cifs
                 session file show -hosting-aggregate
                 <aggregate list> -continously-available No"
                 command to view the open files that have
                 CIFS sessions with non-CA locks established.
                 <aggregate list> is the list of aggregates
                 sent home as a result of the giveback
                 operation. If lock state disruption for all
                 existing non-CA locks is acceptable, retry
                 the giveback operation by specifying
                 "-override-vetoes true". Warning: Overriding
                 vetoes to perform a giveback can be
                 disruptive. For pre-commit failure, search
                 for the lmgr.precommit.oplock.recall EMS
                 variant for information on how to proceed
                 using the "event log show -event
                 lmgr.precommit.oplock.recall.*" command. If
                 the error persists, contact technical
                 support for assistance.
2 entries were displayed.

• 次のようなメッセージがEMSに記録されることがあります。

[node2: cf_giveback: gb.sfo.veto.lmgr.nonCA.locks:error]: Could not complete giveback because of non-CA locks on volume vol_node1@vserver:123a-123a-123a-123a-123a-1234567890ab SFO aggregate aggr_node1.

[node2: cf_giveback: sfo.sendhome.subsystemAbort:alert]: The giveback operation of 'aggr_DATA' was aborted by 'lock_manager'.
[node2: cf_giveback: ha.giveback.totalVetoChk:debug]: Total time taken to check whether to veto the giveback of aggregate 'aggr_DATA' was 5 msecs.

• BlueXP Canvasにアラートが表示 "Working Environment is degraded" on the "XXX" systemされます。