apache mod_perl question

I have a issue with a web server runing apache mod_perl.
the symptoms are data from one http request was used in a later
http request. The value was stored in a my variable.

My question is simply this:
Is one http request served by one apache in-memory perl interpreter
or not?

if the script looks like this:

my v = #whatever user entered;
&foo();

sub foo {
&bar();
}

sub bar {
#use v here.
}

It is possible that during one request foo and bar are actually run by two
different instance of perl interpreter?
If it is, then I find the problems. otherwise I have to look eles where.

Thanks.

 

It's almost certain that is the problem. One should never use a varible like that. If you need to use the varible
in different functions, always pass it around.