Path: utzoo!vpk3!bob
From: bob@vpk3.UUCP (Bob Kyryliuk)
Newsgroups: tor.news
Subject: Re: duplicate articles (was: drought?)
Summary: Sunspot activity encountered in tor.news.*
Message-ID: <4777@vpk3.UUCP>
Date: 24 Apr 89 20:10:46 GMT
References: <1989Apr19.173049.1553@utzoo.uucp> <429@becker.UUCP> <1989Apr22.142911.1685@ziebmef.uucp>
Reply-To: bob@attcan.UUCP (Bob Kyryliuk)
Organization: AT&T Canada Inc., Toronto
Lines: 61

In article <1989Apr22.142911.1685@ziebmef.uucp> cks@ziebmef.UUCP (Chris Siebenmann) writes:
>In article <429@becker.UUCP> bdb@becker.UUCP (Bruce Becker) writes:
>| 	To add insult to injury, there seems to be a recirculation
>| 	of week-old to 10-day-old news in parts of the local feeds.
>| 	Since some news implementations expire history entries at
>| 	the same time as articles, these won't be seen as duplicates.
>
> I suspect that we're getting close to having loops just over the
>critical time, perhaps due to all the sites that have converted to
>Cnews. I've seen a lot of duplicates in tor.news.stats and various
>other groups; the late-arriving duplicates all have rather long paths.
>Relatively central sites still running Bnews may want to up their
>history retention times for tor.* groups to try and choke this off.

I've noticed a small number of duplicate articles on attcan in tor.news.* that
actually were processed as separate articles ...

It can't be explained by expire times, since we don't expire tor.*
for 7 days, and yet some of the articles arrived on the same day, or
a day apart. The usual check of the Message-ID showed that they
were identical.

I've never heard of this problem before ... and nobody has reported the problem
to me internally on any but the tor.news.* groups.

We're still running B-News 2.11.14 (although we'll move up to C-News when it
becomes available).

Here's a sample duplicate article from mark@sickkids:

	article headers (note identical Message-ID's):

		148:Path: attcan!utgpu!lsuc!sickkids!mark
		148:Message-ID: <259@sickkids.UUCP>

		151:Path: attcan!utzoo!yunexus!maccs!lsuc!sickkids!mark
		151:Message-ID: <259@sickkids.UUCP>

	history.d entries (note that they arrived the same day):

		<259@sickkids.UUCP>	04/22/89 02:23	tor.news/148
		<259@sickkids.UUCP>	04/22/89 13:02	tor.news/151

As we often get numerous duplicate articles because of our multiple feeds
(ie 1000-10000 per day :-) which are handled correctly, it seems odd that 
a few of the tor.news.* articles are slipping in past the B-News software.
 
Anyone have any clues?

Regards,
	Bob
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