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WORM-appendable file write operation occasionally returns  NFS3ERR_ROFS error

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Category:
ontap-9
Specialty:
dp
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Applies to

  • ONTAP 9
  • SnapLock
  • WORM-appendable file

Issue

  • An application is running on the NFS client, which is specifically designed to collect log files and transfer them to a Snaplock volume using the NFSv3 protocol in WORM-appendable mode.
  • The customer has found that the content of some WORM-appendable files have been truncated.
  • The investigation result from the packet trace shows that the write responses occasionally report NFS3ERR_ROFS error.
Example:
297209   2024-05-27 11:37:41.196906      0.000002        client_ip    676  storage_ip    2049       NFS        65226     V3 WRITE Call (Reply In 298140), FH: 0x7300cdb0 Offset: 269320192 Len: 65536 UNSTABLE
297232   2024-05-27 10:37:41.197169      0.000004        client_ip    676  storage_ip    2049       NFS        62202     V3 WRITE Call (Reply In 298145), FH: 0x7300cdb0 Offset: 269385728 Len: 65536 UNSTABLE
297255   2024-05-27 10:37:41.197369      0.000002        client_ip    676  storage_ip    2049       NFS        65226     V3 WRITE Call (Reply In 298143), FH: 0x7300cdb0 Offset: 269451264 Len: 65536 UNSTABLE
297278   2024-05-27 11:37:41.197675      0.000002        client_ip    676  storage_ip    2049       NFS        62202     V3 WRITE Call (Reply In 298142), FH: 0x7300cdb0 Offset: 269516800 Len: 65536 UNSTABLE
298140   2024-05-27 11:37:41.210737      0.000026        storage_ip    2049       client_ip    676  NFS        230  V3 WRITE Reply (Call In 297209) Len: 65536 FILE_SYNC
298142   2024-05-27 11:37:41.210768      0.000024        storage_ip    2049       client_ip    676  NFS        230  V3 WRITE Reply (Call In 297278) Len: 65536 FILE_SYNC
298143   2024-05-27 11:37:41.210837      0.000069        storage_ip    2049       client_ip    676  NFS        214  V3 WRITE Reply (Call In 297255) Error: NFS3ERR_ROFS
298145   2024-05-27 11:37:41.210883      0.000040        storage_ip    2049       client_ip    676  NFS        214  V3 WRITE Reply (Call In 297232) Error: NFS3ERR_ROFS
298146   2024-05-27 11:37:41.210929      0.000046        storage_ip    2049       client_ip    676  NFS        230  V3 WRITE Reply (Call In 297301) Len: 65536 FILE_SYNC

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