CIFS access outage due to excessive vscan workload
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