The output is a dbf file called "clipResults.dbf". There are also two associated lock files for each of our AGS servers in that cluster: "clipResults.dbf.ARETE.6352.9956.sr.lock" and "clipResults.dbf.COL.15756.21172.sr.lock".
If I try to run the gp service task and those locks are there, I get the following AGS error. The only way to not get the error is to stop and restart the service, which clearly isn't anything but a very short term solution:
Error executing tool.: ERROR 000258: Output \\lcgfs02\gisserverdata\gp\output\landcover\clipResults.dbf already exists Failed to execute (Table to Table). Failed to execute (Model).