[Xastir] Object deletion issue

[Tom Russo]

The transmission of the delete message is by design and happens according
to the decaying transmission rate algorithm.  Just as with all messages
and object transmission, the point is to repeatedly transmit the information so
that all conforming APRS clients can receive it (even if they only just 
turned on), but to decrease the frequency over time when the information
isn't changing.

The fact that aprs.fi doesn't delete the object when it receives a
delete message is the problem.

On Tue, Nov 15, 2022 at 04:52:38PM +0200, we recorded a bogon-computron collision of the <sv1ljj at raag.org> flavor, containing:
> Hello all,
> 
> During the last Athens Classic Marathon event I noticed an issue that I would
> like your feedback.
> 
> Xastir version is 2.1.8
> 
> If you create an APRS object and after a while you delete it, the object
> disappears from the map but the delete message is being transmitted over and
> over.
> 
> Here is the net.log
> 
> $ grep -B1 -i dokimi net.log 
> # 1668518517  ?????? ?????? 15 15:21:57 EET 2022
> SV1LJJ-4>APX218,TCPIP*:;Dokimi1  *151321z/;9A`TPqH/   
> --
> # 1668518550  ?????? ?????? 15 15:22:30 EET 2022
> SV1LJJ-4>APX218,TCPIP*:;Dokimi1  *151322z/;9A`TPqH/   
> --
> # 1668518584  ?????? ?????? 15 15:23:04 EET 2022
> SV1LJJ-4>APX218,TCPIP*:;Dokimi1  *151323z/;9A`TPqH/   
> # 1668518585  ?????? ?????? 15 15:23:05 EET 2022
> SV1LJJ-4>APX218,TCPIP*:;Dokimi1  _151323z/;9A`TPqH/   
> --
> # 1668518618  ?????? ?????? 15 15:23:38 EET 2022
> SV1LJJ-4>APX218,TCPIP*:;Dokimi1  _151323z/;9A`TPqH/   
> --
> # 1668518669  ?????? ?????? 15 15:24:29 EET 2022
> SV1LJJ-4>APX218,TCPIP*:;Dokimi1  _151324z/;9A`TPqH/   
> --
> # 1668518737  ?????? ?????? 15 15:25:37 EET 2022
> SV1LJJ-4>APX218,TCPIP*:;Dokimi1  _151325z/;9A`TPqH/   
> --
> # 1668518873  ?????? ?????? 15 15:27:53 EET 2022
> SV1LJJ-4>APX218,TCPIP*:;Dokimi1  _151327z/;9A`TPqH/   
> --
> # 1668519145  ?????? ?????? 15 15:32:25 EET 2022
> SV1LJJ-4>APX218,TCPIP*:;Dokimi1  _151332z/;9A`TPqH/   
> --
> # 1668519638  ?????? ?????? 15 15:40:38 EET 2022
> SV1LJJ-4>APX218,TCPIP*:;Dokimi1  _151340z/;9A`TPqH/   
> --
> # 1668520454  ?????? ?????? 15 15:54:14 EET 2022
> SV1LJJ-4>APX218,TCPIP*:;Dokimi1  _151354z/;9A`TPqH/   
> --
> # 1668521576  ?????? ?????? 15 16:12:56 EET 2022
> SV1LJJ-4>APX218,TCPIP*:;Dokimi1  _151412z/;9A`TPqH/   
> --
> # 1668522324  ?????? ?????? 15 16:25:24 EET 2022
> SV1LJJ-4>APX218,TCPIP*:;Dokimi1  _151425z/;9A`TPqH/   
> 
> This behavior along with aprs.fi inability to distinguish the creation from the
> deletion of an object created a little confusion on our last event!!!
> 
> 73
> Apostolos, SV1LJJ
> 
> _______________________________________________
> Xastir mailing list
> Xastir at lists.xastir.org
> http://xastir.org/mailman/listinfo/xastir

-- 
Tom Russo    KM5VY
Tijeras, NM  

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