Issue with "connectTo" function in "network" package

aditya siram

3 Jun 2010 3 Jun '10

11:30 p.m.

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)

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Roman Cheplyaka

4 Jun 4 Jun

2:39 p.m.

New subject: Issue with "connectTo" function in "network" package

* aditya siram [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

Jeremy Shaw

5:57 p.m.

New subject: Issue with "connectTo" function in "network" package

Perhaps it was only listening on IPv6 ? ::1 ? - jeremy On Thu, Jun 3, 2010 at 10:30 PM, aditya siram wrote:

...

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) _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

aditya siram

5:59 p.m.

New subject: Issue with "connectTo" function in "network" package

Yeah, that seems to be the issue. When I commented out the "::1.." line it worked. -deech On 6/4/10, Jeremy Shaw wrote:

...

Perhaps it was only listening on IPv6 ? ::1 ?

- jeremy

On Thu, Jun 3, 2010 at 10:30 PM, aditya siram wrote:

...
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) _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Roman Cheplyaka

7 Jun 7 Jun

3:56 p.m.

New subject: Issue with "connectTo" function in "network" package

Another way round -- "it" (the server) was only listening on IPv4 and the (Haskell) client only tried to connect via IPv6. The bug is described here (with a patch): http://trac.haskell.org/network/ticket/30 * Jeremy Shaw [2010-06-04 16:57:38-0500]

...

Perhaps it was only listening on IPv6 ? ::1 ?

- jeremy

On Thu, Jun 3, 2010 at 10:30 PM, aditya siram wrote:

...
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) _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

...

_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@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

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aditya siram
Jeremy Shaw
Roman Cheplyaka