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CIFS access outage due to excessive vscan workload

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131
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Category:
ontap-9
Specialty:
nas
Last Updated:

Applies to

  • ONTAP 9
  • CIFS
  • VSCAN

Issue

  • Recurrent outages during peak working hours
  • Signature may include the following entries in sktrace:
NBLADE_Chk:  n0xc0a384: src/Protocols/Cifs/Support/CifsCmdContext.cpp:172 rt=1019
NBLADE_Chk:  n0xb1c007: src/Protocols/Cifs/Support/SpinNpMgr.cpp:1472 rt=1019
NBLADE_Chk:  n0xb19aab: src/Protocols/Cifs/Support/SpinNpMgr.cpp:264 rt=1019
NBLADE_Chk:  n0xb19b51: src/Protocols/Cifs/Support/SpinNpMgr.cpp:283 rt=1019
NBLADE_Chk:  n0xa5fdfe: src/Protocols/Cifs/Support/PathResolver.cpp:987 rt=1019
NBLADE_Chk:  n0xa5d055: src/Protocols/Cifs/Support/PathResolver.cpp:424 rt=1019
NBLADE_Chk:  n0xaa04f0: src/Protocols/Cifs/SmbRequests/Smb2CreateCmd.cpp:2255 rt=1019
NBLADE_Chk:  n0xa9c331: src/Protocols/Cifs/SmbRequests/Smb2CreateCmd.cpp:394 rt=1019
NBLADE_Chk:  n0xa95864: src/Protocols/Cifs/Support/Smb2CompoundProcessor.cpp:2204 rt=1019
NBLADE_Chk:  n0xa934b8: src/Protocols/Cifs/Support/Smb2CompoundProcessor.cpp:477 rt=1019
NBLADE_Chk:  n0x9cdd81: src/Protocols/Cifs/FrameWork/Connection.cpp:2135 rt=1019
 
  • A packet trace may show one or more clients massively repeating the following behavior:
    • opening an existing file o creating a new file
    • appending a small amount of data at the end of the filer itself
    • closing the file
 

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