[racket] host not found error

On Sunday, May 6, 2012, prad wrote:

> 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:


Hi prad,

Are you doing the open-input-url in a loop, out of curiosity?  If so, do
you close the opened ports between each loop  iteration?

336 is a very specific observation.  Is it repeatable?



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?
>

This particular error seems to be blaming host name lookup.  As far as I
understand, the error's occuring even before you program can contact the
remote server, if I understand the error message.  Odd.  If it were some
kind of deliberate rate limiting, I'd expect a different class of error
message.
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