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ONTAP S3 TLS handshake limit causes PUT failures

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Category:
ontap-9
Specialty:
nas
Last Updated:

Applies to

  • NetApp ONTAP 9.x
  • Ontap S3 protocol

Issue

  • S3 PUT operations fail and uploads to buckets are failing intermittently.
  • Below error is seen on application end when upload to bucket is failing.

"error_details": [
 "{\"type\":\"snapshot_exception\",\"reason\":\"[found-snapshots:cloud-snapshot-2026.09.11-6ixxxxx-jxxxxx] failed to create snapshot successfully, 1 out of 169 total shards failed\"}"

  • ONTAP is reaching the maximum limit of 170 concurrent TLS connection handshakes.
  • Subsequent TLS connections fail, causing S3 client connection failures.

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