We tried to backup a machine many times ,the machine occasionally failed to use HotAdd and fell back to NBD transport method。
The vddk log is following:
VixDiskLib:vixDiskLib ConnectEx:Advanced transport modes not available for opening moref=695. Cannot use advanced transport modes for <ESXi IP>/moref=695/695-snapshot-47:Invalid search specifier: moref:695.)
This happened occasionally.
Does any one have any idea of what could be going wrong here?
Environment: ESXi 6.5 and VDDK 6.7.3