Thread gathering and subject matching

Thread gathering and subject matching

[Greg Stark]

How come Gnus is clever enough to put most of the posts into a single thread,
but not clever enough to avoid repeating the same subject in my summary buffer
a dozen times? And there doesn't seem to be any pattern, some orphans have the
subject some don't, some non-orphans do, some don't.

Also, how come it managed to reparent enough of them but about a page lower
there are three more, that it missed?

Obviously I haven't enough information to actually fix the bug from this
report, but I'm wondering if this is just a known problem that everyone sees
or is this quirk actually peculiar to me?

I'm using pGnus 0.99 and this group is an nnml mail folder filtered by
procmail. I have the relevant variables (*-make-false-root et al) set to their
defaults I believe.


   [  24: Henrique M Holschuh ] Re: Bug#81397: [authorization] fails silently for normal users, cannot start server
     <  51: Eray Ozkural (exa)  > 
     <  44: Eray Ozkural (exa)  > 
       [  18: Hamish Moffatt      ] 
         [  39: Eray Ozkural (exa)  ] Re: Bug#81397: [authorization] fails silently for normal users, cannot  start server
           [  43: Hamish Moffatt      ] Re: Bug#81397: [authorization] fails silently for normal users, cannot start server
     <  62: Oliver M . Bolzer   > 
       [  28: Bud Rogers          ] 
       [  48: Eray Ozkural (exa)  ] Re: Bug#81397: [authorization] fails silently for normal users, cannot  start server
     <  20: Manoj Srivastava    > Re: Bug#81397: [authorization] fails silently for normal users, cannot start server
     <  22: Hamish Moffatt      > 
       [  21: Eray Ozkural (exa)  ] Re: Bug#81397: [authorization] fails silently for normal users, cannot  start server
         [  23: Hamish Moffatt      ] Re: Bug#81397: [authorization] fails silently for normal users, cannot start server
         [  31: Steve Langasek      ] Re: Bug#81397: [authorization] fails silently for normal users, cannot  start server
       [  30: Steve Langasek      ] Re: Bug#81397: [authorization] fails silently for normal users, cannot start server

...

   [  31: Eray Ozkural (exa)  ] Re: Bug#81397: [authorization] fails silently for normal users, cannot  start server
     [  17: Hamish Moffatt      ] Re: Bug#81397: [authorization] fails silently for normal users, cannot start server
       [  27: Eray Ozkural (exa)  ] Re: Bug#81397: [authorization] fails silently for normal users, cannot  start server

-- 
greg

Re: Thread gathering and subject matching

[Toby Speight]

0> In article <87ofxj26wl.fsf@stark.yi.org>,
0> Greg Stark <URL:mailto:gsstark@mit.edu> ("Greg") wrote:

Greg> How come Gnus is clever enough to put most of the posts into a
Greg> single thread, but not clever enough to avoid repeating the same
Greg> subject in my summary buffer a dozen times?

Because, in your example, the subjects were *not* the same - some
respondents have added spaces before the word "start":

Greg>    [  24: Henrique M Holschuh ] Re: Bug#81397: [authorization] fails silently for normal users, cannot start server
Greg>      <  51: Eray Ozkural (exa)  >
Greg>      <  44: Eray Ozkural (exa)  >
Greg>        [  18: Hamish Moffatt      ]
Greg>          [  39: Eray Ozkural (exa)  ] Re: Bug#81397: [authorization] fails silently for normal users, cannot  start server
Greg>            [  43: Hamish Moffatt      ] Re: Bug#81397: [authorization] fails silently for normal users, cannot start server
Greg>
Greg>
Greg>
Greg> Also, how come it managed to reparent enough of them but about a
Greg> page lower there are three more, that it missed?

These ones not only have a different subject, but also lack threading
information (In-Reply-To, References).  One thing that I think *is*
Gnus's fault is that thread gathering is done only against thread
roots - WIBNI orphans were also gathered against subthreads when the
subject changes?