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TOPIC: API sending same state vectors in a loop

API sending same state vectors in a loop 2 months 2 weeks ago #1238

Hello,

Since yesterday at approximately 14:00 UTC I'm facing a weird bug when I query the API. It looks like the API returns the same sequence of state vectors for a while, then it updates, and returns a new sequence again for a while, etc. As if at times the same ADS-B data were processed in a loop.

Is an administrator aware of the problem ?

Thanks in advance.
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API sending same state vectors in a loop 2 months 1 week ago #1242

Looks like the problem solved itself...
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API sending same state vectors in a loop 2 months 1 week ago #1243

  • strohmeier
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Apologies, we did have a hiccup on our speed layer. This is always temporary though and our batch layer / historical database is not affected.
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API sending same state vectors in a loop 2 months 1 week ago #1244

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API sending same state vectors in a loop 2 months 1 week ago #1245

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Again data from the past. JAF44D has been landed in Brussels at 14:15. This query is made at 14:55. Also flight EWG1UP is already been arrived at the Belgian coast heading to the UK. Strange!!

opensky-network.org/api/states/all?lamin...6014&lomax=6.0659783

{"time":1598014480,"states":"3c6755","EWG1UP ","Germany",1598014475,1598014475,5.6473,50.916,7109.46,false,188.74,254.18,6.83,null,7391.4,"4105",false,0],["44d1c3","JAF44D ","Belgium",1598014477,1598014479,5.7161,50.7897,10972.8,false,225.7,305.54,0,null,11567.16,"1000",false,0}
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API sending same state vectors in a loop 2 months 1 week ago #1246

I confirm that the problem is present again today.

I haven't found any solution to filter out invalid data on client side when this issue occurs. I tried to filter the data based on the timestamp of the last position/last contact update and ignore the data if a repetition occurs in the data, but it's a lost cause. The position of the aircraft is wrong for a given timestamp anyway.
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API sending same state vectors in a loop 2 months 1 week ago #1248

  • Nigel
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I was encountering this the other day also, I am currently getting accurate data in North America it seems.
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API sending same state vectors in a loop 2 months 6 days ago #1249

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Yesterday at 18:26 CET the following lines appeared on my API request:

{"time":1598200014,"states":"040156","ETH3750 ","Ethiopia",1598200007,1598200007,5.7571,50.8576,723.9,false,120.61,127.9,6.18,null,807.72,"3144",false,0}
{"time":1598200030,"states":"040156","ETH3750 ","Ethiopia",1598200007,1598200019,5.7571,50.8576,11277.6,false,120.61,127.9,6.18,null,807.72,"3144",false,0}
{"time":1598200044,"states":"040156","ETH3750 ","Ethiopia",1598200007,1598200019,5.7571,50.8576,11277.6,false,120.61,127.9,6.18,null,807.72,"3144",false,0}
{"time":1598200059,"states":"040156","ETH3750 ","Ethiopia",1598200007,1598200019,5.7571,50.8576,11277.6,false,120.61,127.9,6.18,null,807.72,"3144",false,0}
{"time":1598200075,"states":"040156","ETH3750 ","Ethiopia",1598200007,1598200019,5.7571,50.8576,11277.6,false,120.61,127.9,6.18,null,807.72,"3144",false,0}
{"time":1598200094,"states":"040156","ETH3750 ","Ethiopia",1598200007,1598200019,5.7571,50.8576,11277.6,false,120.61,127.9,6.18,null,807.72,"3144",false,0}
{"time":1598200110,"states":"040156","ETH3750 ","Ethiopia",1598200007,1598200019,5.7571,50.8576,11277.6,false,120.61,127.9,6.18,null,807.72,"3144",false,0}

This flight has been taken off from Maastricht (MST) airport at 17:50 CET. The first line shows an bar. altitude of 723,9 m, but 16 secs later the altitude is 11277,6 m. while true-track and velocity are the same. Even worse, all the following records are all the same. What is going wrong?

See also the tracklog at uk.flightaware.com/live/flight/ETH3750/h...20113.31703/tracklog
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API sending same state vectors in a loop 2 months 6 days ago #1250

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Yeah, I've been getting some inconsistent replies from my requests, almost as if it's playing back what happened 30 minutes ago.

Although as mentioned, when I check the time stamp, it does give me the current time.
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API sending same state vectors in a loop 2 months 5 days ago #1251

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Let's wait for an answer and solution from Opensky network!!
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API sending same state vectors in a loop 2 months 5 days ago #1252

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Again strange sequences of API replies. Sometimes the alititude is null, sometimes 'on_ground' is true while the airplane is in the air, etc. Also a lot of repeats with different time stamps.
Can somebody from Opensky network reply to these messages?


{"time":1598341444,"states":"4ba892","THY6497 ","Turkey",1598341444,1598341444,5.7946,50.9359,251.46,false,71.49,212.66,-3.9,null,594.36,"1733",false,0}
{"time":1598341459,"states":"4ba892","THY6497 ","Turkey",1598341458,1598341459,5.7867,50.9281,190.5,false,69.64,212.63,-3.58,null,243.84,"1733",false,0}
{"time":1598341475,"states":"4ba892","THY6497 ","Turkey",1598341469,1598341474,5.7808,50.9223,137.16,false,69.64,212.63,-3.58,null,190.5,"6761",false,0}

{"time":1598341535,"states":"4ba892","THY6497 ","Turkey",1598341532,1598341533,5.761,50.9028,441.96,true,70.35,212.76,-3.58,null,495.3,"1733",false,0}

{"time":1598341565,"states":"4ba892","THY6497 ","Turkey",1598341564,1598341564,5.758,50.9005,null,true,4.89,222.19,null,null,null,"1733",false,0}
{"time":1598341580,"states":"4ba892","THY6497 ","Turkey",1598341579,1598341579,5.7586,50.9004,null,false,71.49,212.66,-3.58,null,null,"1733",false,0}

{"time":1598341670,"states":"4ba892","THY6497 ","Turkey",1598341668,1598341668,5.7683,50.9101,null,true,23.15,30.94,null,null,null,"1733",false,0}
{"time":1598341684,"states":"4ba892","THY6497 ","Turkey",1598341668,1598341684,5.7683,50.9101,266.7,true,71.93,212.44,-3.58,null,null,"1733",false,0}
{"time":1598341699,"states":"4ba892","THY6497 ","Turkey",1598341694,1598341694,5.796,50.9372,259.08,false,71.49,212.66,-3.9,null,320.04,"1733",false,0}
{"time":1598341715,"states":"4ba892","THY6497 ","Turkey",1598341694,1598341711,5.796,50.9372,243.84,false,71.06,212.88,-3.58,null,297.18,"1733",false,0}
{"time":1598341734,"states":"4ba892","THY6497 ","Turkey",1598341694,1598341711,5.796,50.9372,243.84,false,71.06,212.88,-3.58,null,297.18,"1733",false,0}
{"time":1598341749,"states":"4ba892","THY6497 ","Turkey",1598341694,1598341711,5.796,50.9372,243.84,false,71.06,212.88,-3.58,null,297.18,"1733",false,0}
{"time":1598341764,"states":"4ba892","THY6497 ","Turkey",1598341694,1598341711,5.796,50.9372,243.84,false,71.06,212.88,-3.58,null,297.18,"1733",false,0}
{"time":1598341780,"states":"4ba892","THY6497 ","Turkey",1598341694,1598341711,5.796,50.9372,243.84,false,71.06,212.88,-3.58,null,297.18,"1733",false,0}
{"time":1598341795,"states":"4ba892","THY6497 ","Turkey",1598341694,1598341711,5.796,50.9372,243.84,false,71.06,212.88,-3.58,null,297.18,"1733",false,0}
{"time":1598341809,"states":"4ba892","THY6497 ","Turkey",1598341694,1598341711,5.796,50.9372,243.84,false,71.06,212.88,-3.58,null,297.18,"1733",false,0}
{"time":1598341825,"states":"4ba892","THY6497 ","Turkey",1598341694,1598341711,5.796,50.9372,243.84,false,71.06,212.88,-3.58,null,297.18,"1733",false,0}
{"time":1598341840,"states":"4ba892","THY6497 ","Turkey",1598341694,1598341711,5.796,50.9372,243.84,false,71.06,212.88,-3.58,null,297.18,"1733",false,0}
{"time":1598341854,"states":"4ba892","THY6497 ","Turkey",1598341694,1598341711,5.796,50.9372,243.84,false,71.06,212.88,-3.58,null,297.18,"1733",false,0}
{"time":1598341870,"states":"4ba892","THY6497 ","Turkey",1598341694,1598341711,5.796,50.9372,243.84,false,71.06,212.88,-3.58,null,297.18,"1733",false,0}
{"time":1598341885,"states":"4ba892","THY6497 ","Turkey",1598341694,1598341711,5.796,50.9372,243.84,false,71.06,212.88,-3.58,null,297.18,"1733",false,0}
{"time":1598341899,"states":"4ba892","THY6497 ","Turkey",1598341694,1598341711,5.796,50.9372,243.84,false,71.06,212.88,-3.58,null,297.18,"1733",false,0}
{"time":1598341914,"states":"4ba892","THY6497 ","Turkey",1598341694,1598341711,5.796,50.9372,243.84,false,71.06,212.88,-3.58,null,297.18,"1733",false,0}
{"time":1598341930,"states":"4ba892","THY6497 ","Turkey",1598341694,1598341711,5.796,50.9372,243.84,false,71.06,212.88,-3.58,null,297.18,"1733",false,0}
{"time":1598341944,"states":"4ba892","THY6497 ","Turkey",1598341694,1598341711,5.796,50.9372,243.84,false,71.06,212.88,-3.58,null,297.18,"1733",false,0}
{"time":1598341960,"states":"4ba892","THY6497 ","Turkey",1598341694,1598341711,5.796,50.9372,243.84,false,71.06,212.88,-3.58,null,297.18,"1733",false,0}
{"time":1598341975,"states":"4ba892","THY6497 ","Turkey",1598341694,1598341711,5.796,50.9372,243.84,false,71.06,212.88,-3.58,null,297.18,"1733",false,0}
{"time":1598341994,"states":"4ba892","THY6497 ","Turkey",1598341694,1598341711,5.796,50.9372,243.84,false,71.06,212.88,-3.58,null,297.18,"1733",false,0}
{"time":1598342009,"states":"4ba892","THY6497 ","Turkey",1598341694,1598341711,5.796,50.9372,243.84,false,71.06,212.88,-3.58,null,297.18,"1733",false,0}
{"time":1598342024,"states":"4ba892","THY6497 ","Turkey",1598341694,1598341711,5.796,50.9372,243.84,false,71.06,212.88,-3.58,null,297.18,"1733",false,0}
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API sending same state vectors in a loop 2 months 5 days ago #1253

  • strohmeier
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As mentioned on our Twitter, we are having some load issues with the speed layer that powers the API. So, some trajectories are out of date as you have noticed. We are working on fixing this of course but as a volunteer organisation, this can take time. All is delivered at a best effort, with the usual guarantees that you get for a free product. NB: Our historical database is unaffected by this.
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The following user(s) said Thank You: jbroutier, Nigel

API sending same state vectors in a loop 2 months 5 days ago #1254

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Thank you. I have no twitter account, so I missed that.
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