Hello Omid, were you able to find a solution? I have the same issue.

Can you tell me what you did before findind the issue? I updated VCSA to latest version (a few weeks ago).

I have two ESX hosts two NFS datastores and two iSCSI one

VCSA: 6.7.0, build 15976728

host1: VMware ESXi, 6.7.0, 14320388

host2: VMware ESXi, 6.7.0, 8169922

2020-04-29T13:26:30.588Z info vpxa[2099449] [Originator@6876 sub=Libs opID=lro-1850522-7ab0cf65] NfcNet_OptimizeSocketBuffer: Setting buffer size using RTT=0 ms BANDWIDTH=134000 bytes/ms BUFFER_SIZE=40KB

2020-04-29T13:26:30.588Z info vpxa[2099449] [Originator@6876 sub=vpxNfcServer opID=lro-1850522-7ab0cf65] Successfully initialized nfc callback for a write to the socket to be invoked on a separate thread

2020-04-29T13:26:30.588Z info vpxa[2099449] [Originator@6876 sub=vpxNfcServer opID=lro-1850522-7ab0cf65] Plugin started

2020-04-29T13:26:30.588Z info vpxa[2099449] [Originator@6876 sub=vpxLro opID=lro-1850522-7ab0cf65] [VpxLRO] -- FINISH lro-1850522

2020-04-29T13:26:30.810Z warning vpxa[2099391] [Originator@6876 sub=Libs] [NFC ERROR] NfcFileRawPread: Failed to read 2940 bytes at offset 0 from file '/vmfs/volumes/521e576f-82a8f646-d3cd-40f2e9078432/vmWinMdza': Success (@&!*@*@(msg.fileio.success)Success)

2020-04-29T13:26:30.811Z warning vpxa[2099161] [Originator@6876 sub=Libs] [NFC ERROR] NfcFssrvrSendResponse: Found an error in the nfc session: A file error was encountered (NFC_FILE_ERROR)

2020-04-29T13:26:30.811Z warning vpxa[2099161] [Originator@6876 sub=Libs] [NFC ERROR] Sending fileIO error 2: A file error was encountered -- NfcFssrvrRead: failed to read 2940 bytes @ 0 : Error