getting "Software caused connection abort" in cache.log

[Anuj Shrestha <anujstha@xxxxxxxxxxxx>]

hii,
 i m getting a lot of these error in cache.log. Is this normal or i 
have to make some change. thanks in advance.

2008/11/04 16:56:09| comm_old_accept: FD 14: (53) Software caused 
connection abort
2008/11/04 16:56:09| httpAccept: FD 14: accept failure: (53) Software 
caused connection abort

regards,
anuj shrestha