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Groups > comp.os.linux.networking > #2970

Re: Multiple connections to NNTPserver?

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On Sat, 07 Jun 2014 16:21:22 +0000, William Unruh wrote:

> On 2014-06-07, Avoid9Pdf@gmail.com <Avoid9Pdf@gmail.com> wrote:
>> In the old-days Newsgroup-names didn't contain minus-signs. Now they
>> do.
>> So I hacked the good-old NTTP 'handler', [based on rfc..]. But now,
>> sometimes it hangs.  Often after the first fetch.
>>
>> When I asked: list article-header-numbers in comp.sys.raspberry-pi,
>> containing "onta" in <Subject>, it hang, if it's already done a fetch.
>>
>> lsof | grep <pid>
>>   shows the 2 lines:--
>>  22380   root   29u  IPv4  391647 \
>>   TCP 10.208.223.203:41160->78.46.70.116:nntp (ESTABLISHED)
>>  22380   root   30u  IPv4  391655 \
>>  TCP 10.208.223.203:41162->78.46.70.116:nntp (ESTABLISHED)
>>
>> Does this mean that I had 2 connections to 78.46.70.116:nntp, when it
>> hung ?
>>
>> Shouldn't the 1st connection have closed, since I only 'called' the
>> second fetch, after I saw that the 1st had arrived.
> 
> It could also be that it regularly uses more than one connection to
> download the material. You do not even say which reader you are using.
> 
Because you don't know it:ETH.Oberon for linux, which I've modified to
accept <groupNames containing a 'minus sign'>
> 
>> Perhaps the NNTP-server [eternal september] doesn't allow D.O.S.-like
>> multiple connections?
> 
> It allows up to 4 concurrent connections, according to their faq.
>>
>>==TIA.

I've been thinking how to show the marvels of *nix piping to some
non-*nix users, via this exercise:
Why is this LEO [aka Linux-based ETH Oberon] hanging?
Show me the pid/s of all LEO = pgrep beron
Show me the latest one started = pgrep beron | tail -1
Show me which files it has open = lsof | grep `pgrep beron |tail -1`

!!Wow!! 
There a big problem. Right now, by test/pasteing that cmd, it shows:
.. IPv4 391647 TCP 10.208.223.203:41160->78.46.70.116:nntp (ESTABLISHED)
But I've been off-line for 10 hours.

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Multiple connections to NNTPserver? Avoid9Pdf@gmail.com - 2014-06-07 13:15 +0000
  Re: Multiple connections to NNTPserver? William Unruh <unruh@invalid.ca> - 2014-06-07 16:21 +0000
    Re: Multiple connections to NNTPserver? Unknown <dog@gmail.com> - 2014-06-08 08:45 +0000

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