XOVER failure

Sam Varshavchik mrsam at courier-mta.com
Fri May 7 03:34:45 UTC 2010


I'm seeing something I do not understand. tradindexed overview.

I can reproduce the following response reliably, with a basic telnet 
connection:

Connected to localhost.
Escape character is '^]'.
200 commodore.email-scan.com InterNetNews server INN 2.5.0 ready
MODE READER
200 commodore.email-scan.com InterNetNews NNRP server INN 2.5.0 ready 
(posting ok)

[ I enter a GROUP, then get an XOVER for the last message in the group ]

GROUP news.admin.net-abuse.email
211 2524 581647 584170 news.admin.net-abuse.email
XOVER 584170-584170
224 Overview information for 584170-584170 follows
584170	[ overview for this message snipped ]
.

Ok, now, I add a new message to this newsgroup, then issue a GROUP again:

GROUP news.admin.net-abuse.email
211 2525 581647 584171 news.admin.net-abuse.email

High watermark is up by 1, I issue an XHDR, followed by an XOVER for the new 
message. This is what happens:

XHDR Lines 584171-
221 Header information for Lines follows (from articles)
584171 1
.
XOVER 584171-584171
224 No articles in 584171-584171
.

If I immediately reissue an XOVER again, I now get the overview:

XOVER 584171-584171
224 Overview information for 584171-584171 follows
584171	test message	sam at email-scan.com	Fri, 7 May 2010 03:25:42 
+0000 (UTC)	<hs017m$opu$1 at commodore.email-scan.com>		558	1 
Xref: commodore.email-scan.com news.admin.net-abuse.email:584171
.


WTF?

If I repeat the experiment, and do NOT send an XHDR command, the second time 
around I get the overview on the first try.  Complete log:

Connected to localhost.
Escape character is '^]'.
200 commodore.email-scan.com InterNetNews server INN 2.5.0 ready
MODE READER
200 commodore.email-scan.com InterNetNews NNRP server INN 2.5.0 ready 
(posting ok)
GROUP news.admin.net-abuse.email
211 2525 581647 584171 news.admin.net-abuse.email
XOVER 584171-584171
224 Overview information for 584171-584171 follows
584171	test message	sam at email-scan.com	Fri, 7 May 2010 03:25:42 
+0000 (UTC)	<hs017m$opu$1 at commodore.email-scan.com>		558	1 
Xref: commodore.email-scan.com news.admin.net-abuse.email:584171
.
GROUP news.admin.net-abuse.email
211 2526 581647 584172 news.admin.net-abuse.email
XOVER 584172-584172
224 Overview information for 584172-584172 follows
584172	test message	sam at email-scan.com	Fri, 7 May 2010 03:31:07 
+0000 (UTC)	<hs01hr$ors$1 at commodore.email-scan.com>		558	1 
Xref: commodore.email-scan.com news.admin.net-abuse.email:584172
.

Why do I fail to get an overview if I issue an XHDR beforehand?


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