[Haskell-cafe] Issue with "connectTo" function in "network" package

[aditya siram]

Doing (1) solves my problem. What did I do and why did it work? Thanks
a lot for your help!
-deech

On 6/4/10, Roman Cheplyaka <roma at ro-che.info> wrote:
> Confirm if any of the following solves the problem:
>
> 1. commenting out (by prepending putting hash sign '#' in the beginning
>    of the line) the following line in /etc/hosts:
>
> ::1     localhost ip6-localhost ip6-loopback
>
> 2. executing as root the following command:
>
> rmmod ipv6
>
> * aditya siram <aditya.siram at gmail.com> [2010-06-04 13:51:29-0500]
>> Here's my GHCI session (with my network card off):
>> Prelude Network Network.Socket> connectTo "localhost" (PortNumber 3000)
>> *** Exception: connect: does not exist (Connection refused)
>> Prelude Network Network.Socket> connectTo "127.0.0.1" (PortNumber 3000)
>> {handle: <socket: 7>}
>>
>> The OS is Ubuntu (Lucid) Linux. The contents of "/etc/hosts" and
>> "/etc/nsswitch.conf" are:
>>
>> > cat /etc/nsswitch.conf
>> # /etc/nsswitch.conf
>> #
>> # Example configuration of GNU Name Service Switch functionality.
>> # If you have the `glibc-doc-reference' and `info' packages installed,
>> try:
>> # `info libc "Name Service Switch"' for information about this file.
>>
>> passwd:         compat
>> group:          compat
>> shadow:         compat
>>
>> hosts:          files mdns4_minimal [NOTFOUND=return] dns mdns4
>> networks:       files
>>
>> protocols:      db files
>> services:       db files
>> ethers:         db files
>> rpc:            db files
>>
>> netgroup:       nis
>>
>> > cat /etc/hosts
>> 127.0.0.1       localhost
>> 127.0.1.1       deech-mac-ubuntu
>>
>> # The following lines are desirable for IPv6 capable hosts
>> ::1     localhost ip6-localhost ip6-loopback
>> fe00::0 ip6-localnet
>> ff00::0 ip6-mcastprefix
>> ff02::1 ip6-allnodes
>> ff02::2 ip6-allrouters
>> ff02::3 ip6-allhosts
>>
>>
>> -deech
>>
>> On 6/4/10, Roman Cheplyaka <roma at ro-che.info> wrote:
>> > * aditya siram <aditya.siram at gmail.com> [2010-06-03 22:30:33-0500]
>> >> Hi all,
>> >> I had an issue where using the connectTo [1] function would fail to
>> >> connect to "localhost" if my wireless card was turned off. The moment
>> >> I turned on my wireless connection it worked. But if I use connectTo
>> >> with "127.0.0.1" [2] with my network off it works.
>> >>
>> >> I confirmed that "localhost' resolves to "127.0.0.1" by pinging
>> >> "localhost" from command line with the Internet off.
>> >>
>> >> Is this a bug in "connectTo"?
>> >>
>> >> -deech
>> >>
>> >> [1] connectTo "localhost" (PortNumber some_number)
>> >> [2] connectTo "127.0.0.1" (PortNumber some_number)
>> >
>> > How exactly did it fail? Did it throw an exception? If so, what was the
>> > exception?
>> >
>> > Which operating system did you observe that under?
>> >
>> > If that was Linux, can you show the contents of the following files on
>> > that system:
>> >
>> > /etc/nsswitch.conf
>> > /etc/hosts
>> >
>> > --
>> > Roman I. Cheplyaka :: http://ro-che.info/
>> > "Don't let school get in the way of your education." - Mark Twain
>> > _______________________________________________
>> > Haskell-Cafe mailing list
>> > Haskell-Cafe at haskell.org
>> > http://www.haskell.org/mailman/listinfo/haskell-cafe
>> >
>
> --
> Roman I. Cheplyaka :: http://ro-che.info/
> "Don't let school get in the way of your education." - Mark Twain
>