Environment (Cisco UCS B200 M4 Blade Server) disconnected from vcenter server.
This is bug where we got such type of error on vmkernel log.
vmhba2
2017-02-17T14:49:04.019Z cpu20:996690)<7>fnic : 1 :: Abort Cmd called FCID 0xffffffff, LUN 0x4 TAG 3c6 flags 3
2017-02-17T14:49:04.019Z cpu20:996690)<7>fnic : 1 :: Returning from abort cmd type 0 FAILED
2017-02-17T14:49:04.019Z cpu20:996690)WARNING: LinScsi: SCSILinuxAbortCommands:1882: Failed, Driver fnic, for vmhba1
Check FNIC firmware if it should be Cisco recommended vHBA driver version 1.6.0.28