[racket] host not found error

i'm trying to understand a consistent error i'm getting while using a
racket program to get data from a website.

i'm accessing the site to download certain posts using regexps and store
them in sqlite3.

things go perfectly till i accumulate 336 records and then this error
crashes my script:

tcp-connect: connection to www.30bananasaday.com, port 80 failed; host
not found (at step 1: Host name lookup failure; errno=2)

so if it is a lookup failure that suggests the resolving server doesn't
like me after a certain number of lookups within a specific period of
time? is this reasoning correct?

-- 
in friendship,
prad