CIFS ops timeout accessing shares
Applies to
- ONTAP 9.5 and earlier
- FCP
- CIFS
Issue
- Node reporting CIFS time out errors: Nblade_CifsOperationTimedOut_1
- Specific to CIFS operations arriving on node-01, but volume is remote on node-02.
- High latency when running vserver cifs share show command:
[kern_mgwd:info:1874] cifs_share.next_imp() returns: success (latency: 120.207196s)
Action taken but failed to resolve the issue:
- Reboot CD
- Restart CIFS SVM
- Takeover of node-01
- Give back of node-01 was attempted, but node-02 panicked.
Other errors noted in the logs:
- Leaked share lock
kernel: ems.engine.suppressed:debug]: Event 'Nblade.cifsLockStateMismatch' suppressed 34 times in last 51 seconds. kernel: Nblade.cifsLockStateMismatch:debug]: params: {'pMessage': 'Leaked share lock?'}
- CSM flow control from scsiblade to dblade on the same node:
CsmMpAgentThread: csm.flowControlled:debug]: params: {'uniquifier': '-666654881', 'filename': 'src/Session/session.cc', 'lineno': '9008', 'interface': '1', 'localBladeUUID': 'node-02:scsiblade', 'remoteBladeUUID': 'node-02:dblade'}