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UnobservedTaskExceptionが原因で、SnapCenterでSCSQLデータベースのバックアップが削除されません

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環境

  • SnapCenter Server
  • SnapCenter Plug-in for Microsoft SQL Database(SCSQL)

問題

  • SCSQLバックアップジョブの実行中に保持ポリシーを適用しても、不要なバックアップは削除されません
  • SnapCenter GUIのジョブ詳細ページに 、バックアップの登録と保持の適用 タスクがエラーなしで完了したことが示されます
  • SnapManagerWeb.log エラーを表示します。

ERROR SnapManagerWeb PID=[XXXX] TID=[X] UnobservedTaskException occurred
ERROR SnapManagerWeb PID=[XXXX] TID=[X] Sequence contains no elements Source: System.Core
Stack Trace:   at System.Linq.Enumerable.First[TSource](IEnumerable`1 source)
  at SnapManager.SMSCore.Policy.SmRetentionHandler.FilterBackupsforCurrentHost(List`1 backups, List`1 latestBackupComponentObjectIds)
  at SnapManager.SMSCore.Policy.SmRetentionHandler.ProcessRetention(SmRetentionSettings settings, List`1 backups, SmBackup backup, 
     List`1 latestBackupComponentObjectIds, String pgName, Int64 jobId)
  at SnapManager.SMSCore.Policy.SmRetentionHandler.Execute()
  at SnapManager.SMSCore.Backup.SmRetentionManager.StartRetention(SmBackup currentBackup, SmUserOperationContext userContext, 
  SmJob backupJob, SmPluginCode pluginCode, String pluginName)
  at SnapManager.SMSCore.Backup.SmRetentionManager.StartQueuedRetention(Int64 backupId, SmPluginCode pluginCode)
  at SnapManager.SMSCore.Backup.SmRetentionManager.ProcessQueuedRetentions()
  at System.Threading.Tasks.Task.Execute()

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