Could Not Complete Network Copy For File During VM Cloning

This error may only appears on legacy ESXi hosts. The cloning of virtual machine throws error at 33% of the task.

 Clone virtual machine
Could not complete network copy for file 
/vmfs/volumes/5xxxxxxe-4fb01111-3911-0ccxxxxxac38/TEST/TEST.vmdk
Copying Virtual Machine files

You may see following logs on vpxa.log of source ESXi host.

2017-11-02T02:51:20.238Z [FFF43B70 info 'Libs' opID=812BF517-00000667-f0-34-64] SSL: syscall error 32: Broken pipe
2017-11-02T02:51:20.238Z [FFF43B70 warning 'Libs' opID=812BF517-00000667-f0-34-64] [NFC ERROR] NfcNetTcpWrite: bWritten: -1
2017-11-02T02:51:20.238Z [FFF43B70 warning 'Libs' opID=812BF517-00000667-f0-34-64] [NFC ERROR] NfcFile_SendMessage: data send failed:
2017-11-02T02:51:20.238Z [FFF43B70 warning 'Libs' opID=812BF517-00000667-f0-34-64] [NFC ERROR] NFC_NETWORK_ERROR
2017-11-02T02:51:20.239Z [FFF43B70 error 'NfcManager' opID=812BF517-00000667-f0-34-64] [NfcClient] File transfer [/vmfs/volumes/5xxxxxxe-4fb01111-3911-0ccxxxxxac38/TEST/TEST.vmdk -> /vmfs/volumes/5xxxxxxe-4fb01111-3911-0ccxxxxxac38/TEST1/TEST1.vmdk] failed: The operation experienced a network error
2017-11-02T02:51:20.239Z [FFF43B70 verbose 'NfcManager' opID=812BF517-00000667-f0-34-64] [NfcClient] Closing NFC connection to server
2017-11-02T02:51:20.239Z [FFF43B70 warning 'Libs' opID=812BF517-00000667-f0-34-64] SSL: Unknown SSL Error
2017-11-02T02:51:20.239Z [FFF43B70 info 'Libs' opID=812BF517-00000667-f0-34-64] SSL Error: error:1409E10F:SSL routines:SSL3_WRITE_BYTES:bad length
2017-11-02T02:51:20.239Z [FFF43B70 warning 'Libs' opID=812BF517-00000667-f0-34-64] [NFC ERROR] NfcNetTcpWrite: bWritten: -1
2017-11-02T02:51:20.239Z [FFF43B70 warning 'Libs' opID=812BF517-00000667-f0-34-64] [NFC ERROR] NfcSendMessage: send failed: NFC_NETWORK_ERROR
2017-11-02T02:51:20.239Z [FFF43B70 error 'NfcManager' opID=812BF517-00000667-f0-34-64] [NfcWorker] Error encountered while processing copy spec for file [ds:///vmfs/volumes/5xxxxxxe-4fb01111-3911-0ccxxxxxac38/TEST/TEST.vmdk -> ds:///vmfs/volumes/5xxxxxxe-4fb01111-3911-0ccxxxxxac38/TEST1/TEST1.vmdk]:
--> vim.fault.NetworkCopyFault
2017-11-02T02:51:20.239Z [FFF43B70 error 'NfcManager' opID=812BF517-00000667-f0-34-64] [NfcManagerImpl] Copy operation failed with error: vim.fault.NetworkCopyFault

You may see following logs in vpxa.log of destination ESXi host.

2017-11-02T02:51:18.289Z [304EEB70 warning 'Libs' opID=task-internal-2164-739c5f01] SSL: Unknown SSL Error
2017-11-02T02:51:18.289Z [304EEB70 info 'Libs' opID=task-internal-2164-739c5f01] SSL Error: error:1408F119:SSL routines:SSL3_GET_RECORD:decryption failed or bad record mac
2017-11-02T02:51:18.289Z [304EEB70 warning 'Libs' opID=task-internal-2164-739c5f01] [NFC ERROR] NfcNetTcpRead: bRead: -1
2017-11-02T02:51:18.289Z [304EEB70 warning 'Libs' opID=task-internal-2164-739c5f01] [NFC ERROR] NfcNet_Recv: requested 262144, recevied only 16384 bytes
2017-11-02T02:51:18.289Z [304EEB70 warning 'Libs' opID=task-internal-2164-739c5f01] [NFC ERROR] NfcFile_RecvMessage: data recv failed. retval = 3, expected 262144
2017-11-02T02:51:18.289Z [304EEB70 warning 'Libs' opID=task-internal-2164-739c5f01] [NFC ERROR] NfcFile_ContinueReceive: failed to Recv message
2017-11-02T02:51:18.446Z [304EEB70 warning 'Libs' opID=task-internal-2164-739c5f01] [NFC ERROR] NfcProcessStreamMsg: failed to receive file data
2017-11-02T02:51:18.446Z [304EEB70 warning 'Libs' opID=task-internal-2164-739c5f01] [NFC ERROR] NfcServerLoop: NfcServer_HandleRead returned an error : NFC_NETWORK_ERROR
2017-11-02T02:51:18.446Z [304EEB70 error 'provisioningvpxNfcServer' opID=task-internal-2164-739c5f01] [VPXNFCSERVER] Nfc server failed with return value : NFC_NETWORK_ERROR
2017-11-02T02:51:18.446Z [304EEB70 verbose 'provisioningvpxNfcServer' opID=task-internal-2164-739c5f01] [VPXNFCSERVER] Closing NFC session

It indicates the VM may be created on an older ESXi host or VMware Workstation. Somehow it imported to current ESXi host. Solution is create a new VM on the ESXi host and attach only virtual disks of the problematic VM.

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