Re: [Boost-users] boost::asio::ip::tcp::resolver::query does not work in Ubuntu!!!

Subject: Re: [Boost-users] boost::asio::ip::tcp::resolver::query does not work in Ubuntu!!!
From: Andreas Wehrmann (a.wehrmann_at_[hidden])
Date: 2012-05-12 16:53:56

Zitat von mozdemir <mozdemir76_at_[hidden]>:

> HI Andreas,
>
> you are right. this is not crash. It is an exception.
>
> I did the following small code to explain the issue better
>
> ============================================
>
> #include <iostream>
> #include <boost/asio/ip/tcp.hpp>
> #include <boost/lexical_cast.hpp>
>
>
> using namespace boost::asio;
>
> int main(int argc, char* argv[])
> {
>         io_service ios;
>         try {
>             int i;
>             for (i=0;i<1000;i++) {
>                 int m_port = 80;
>                 std::string m_host = "www.yahoo.com";
>                 boost::system::error_code ec;
>                 boost::asio::ip::tcp::resolver resolver( ios );
>                 boost::asio::ip::tcp::resolver::query query( m_host,
> boost::lexical_cast< std::string >( m_port ));
>
>                 boost::asio::ip::tcp::resolver::iterator endpointIterator =
> resolver.resolve( query );
>                 for(;endpointIterator != ip::tcp::resolver_iterator();
> ++endpointIterator) {
>                     std::cout << "i: " << i << " ip: " <<
> endpointIterator->endpoint().address().to_string() << std::endl;
>                 }
>             }
>
>         } catch(std::exception const& ex) {
>                 std::cerr << "Error: " << ex.what() << '\n';
>         }
> }
> =============================================
>
> the output goes fine but around 300, it throws the exception.
>
> i: 327 ip: 98.139.183.24
> i: 328 ip: 98.139.183.24
> i: 329 ip: 98.139.183.24
>
> Error: Host not found (authoritative)
>
> ============================================
>
> you are suggesting to handle the exception which I will do. But i wonder why
> this is not happening in windows but ubuntu?
>
> I wonder if my ubuntu is missing some configuration. I did install Miredo
> for Ipv6 but it did not help.
> i feel like this is something to do with network settings issue, NAT issue
> or something....
>
> Thank you for the suggestion.
> mustafa
>

I'm not sure right now whether it is against the policy of this mailing list,
but take a look at this:

http://stackoverflow.com/questions/4956915/how-can-i-adapt-this-c-testcase-so-it-continues-to-work-with-a-new-network-dev

This looks similar to your example.
Let us know if it helped.

Regards,
Andreas