We're performing a mass migration of content into a new instance of SDL TD. Our import process instantiates single API objects (for example, a DocumentObj25 object), authenticates, and then makes a number of API calls using that object; for example, SetMetadata(). So authentication should happen only once for the object. However in the InfoShareWS.log file we see a number of repeated lines like the following, which seem to suggest that authentication is happening repeatedly. Does anyone know if this is the case, or what these messages mean?

19:00:51.2074   Info 30   11711 na:UC:myuser2     API25/DocumentObj/SetMetadata     Trisoft.InfoShare.Core.UserContext.Authentication Mapped IIdentity[CORP\ myuser2] to TrisoftUser[myuser2] []  

19:00:51.2074   Info 49   11713 na:UC: myuser2     API25/DocumentObj/SetMetadata     Trisoft.InfoShare.Core.UserContext.Authentication Mapped IIdentity[CORP\ myuser2] to TrisoftUser[myuser2] []