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NFS outage in giveback during aggregate relocation

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Category:
ontap-9
Specialty:
nas
Last Updated:

Applies to

  • ONTAP 9.7
  • SAP HANA

Issue

During aggregate relocation in the giveback phase it may happen that
  • nfsv4 locks are lost
  • A client application such as SAP HANA crashes
The following entries will be in sktrace logs
BLADE_Chk:  n0x930b60: src/Protocols/Nfs/Nfs4/Lock/Nfs4LockState.cpp:6560 rt=4064
NBLADE_Chk:  n0x93086e: src/Protocols/Nfs/Nfs4/Lock/Nfs4LockState.cpp:6258 rt=4064
NBLADE_Chk:  n0xfe840d: src/Protocols/Nfs/Nfs4/Ops/Nfs4OpsIo.cpp:736 rt=4064
NBLADE_Chk:  n0xfec2d6: src/Protocols/Nfs/Nfs4/Ops/Nfs4OpsIo.cpp:1643 rt=4064
if lmgr sktraces are enabled as well the following will be seen also in sktrace logs
[2:0] LMGR_20:  cb_reclaim.c:290:cb_reclaim lgi 2 classify cerr=12 nerr=0

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