Snapshots not being deleted, accumulating on SnapMirror destination volume

Applies to

Issue

• Snapshots are accumulating on a SnapMirror destination volume running ONTAP 9.11.1PX & 9.12.1.
• Typically the Snapshots accumulating are SnapMirror Snapshots, but others may accumulate as well.
• SnapMirror job(s) may fail as the destination volume has reached the snapshot limit.
• The SnapMirror policy is not being followed and Snapshots are not being deleted as configured.
• The following logs may be seen on the destination, reporting the failure to delete Snapshots:

SKTRACE.GZ:

[15:0] SM_HIGH_8:  [sm_rpm.c:9526]: sm_rpm_snaplist_delete([22675]): DELETE Failed snap:<snap_id>:<snapshot_name> Error:16

SNAPMIRROR-ERROR-LOG-TXT.GZ

ScheduledUpdate[Oct 31 01:15:00]:<relationship_uuid> Operation-Uuid=<operation_uuid> Group=none Operation-Cookie=0 sm_rpm_snaplist_delete:9171 Workflow ID [166466] Snapshot "<snapshot_name>" delete failed

EMS-LOG-FILE.GZ

Sat Mar 04 18:50:07  0400 [CCADNASCLU100-01: worker_thread_674: sm.xfer.fail.maxlim.snap:alert]: The number of Snapshot copies on destination volume 'Vol' of the relationship with relationship UUID '5311b3d9-2b5e-11ec-94b5-d039ea1a7ce3' and policy 'MirrorLatest' has reached the maximum supported

OR

SNAPMIRROR.XML

Transfer did not start because the number of Snapshot copies on destination volume <volume name> will exceed the
maximum supported count of 1019. Execute "snapmirror show -destination-vserver <Vserver Name> -fields
last-transfer-error,unhealthy-reason -expand" to check if the constituent volumes have encountered errors.