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SnapCenter Oracle ASM PITR Clone Fails with duplicate key

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Applies to

  • NetApp SnapCenter Server (SCS) 6.2.2
  • SnapCenter Plug-in for Oracle (SCO)
  • Oracle databases on ASM storage
  • Environments using Point-in-Time Recovery (PITR) cloning

Issue

  1. PITR Clone Fails with Duplicate Key Error

    • SnapCenter Oracle ASM PITR clone jobs intermittently fail with the error:
      An item with the same key has already been added. Key: ndbaora70-cluster_UATCDB_Oracle_Database_log_Full_Scheduled_<timestamp>_1
    • Job logs show:
      • EligibleLogBackupIDs contains duplicate values
      • isMissingSCNs=True
      • Number of ALM log backups to be cloned is greater than expected
      • The deduplication step (GetOptimalLogBackupsForRecovery) does not run, leading to duplicate backup IDs being processed
    • Example from SnapManagerWeb log:
      Activity 'Cloning log backup ...' failed with error: An item with the same key has already been added. Key: ...

  2. Clone Deletion after REST Timeout

    • Long-running clone or restore jobs are deleted by SnapCenter after a fixed REST timeout (default 3 hours, configurable).
    • The ApplicationClone REST call remains open even after all sub-steps complete successfully; after the timeout window (e.g., 9 hours), SnapCenter assumes failure and tears down the clone.
    • This results in abrupt deletion of a successfully created clone, sometimes without a graceful Oracle shutdown.

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