AbandonRequestsRule causes an infinite loop to request a same m4s file.

[woshidhp]

Environment

• The MPD passes the DASH-IF Conformance Tool on http://dashif.org/conformance.html
• The stream has correct Access-Control-Allow-Origin headers (CORS)
• There are no network errors such as 404s in the browser console when trying to play the stream
• The issue observed is not mentioned on https://github.com/Dash-Industry-Forum/dash.js/wiki/FAQ
• The issue occurs in the latest reference client on http://dashif.org/reference/players/javascript/ and not just on my page

• Link to playable MPD file:

• Dash.js version: 2.4.0

• Browser name/version: Chrome 54.0.2840

• OS name/version: Win7

Steps to reproduce

1. Please provide clear steps to reproduce your problem
   The testbed is an emulated LTE celluar network. The availiable badwidth between player and server is set to 1.244Mbits and suffers subtle stutters.
   The player is the dash-if-reference-player in the sample folder.
   Just load the MPD file and the bug will occur when AbandonRequestsRule fires.
2. If the bug is intermittent, give a rough frequency if possible
   Every time.

Observed behaviour

Describe what the player is doing that is unexpected or undesired behaviour.
After the AbandonRequestsRule fires and asks to switch to quality to a lower version, the player keeps requesting a same m4s file and causes stalling.

Console output

Paste the contents of the browser console here.
You may need to enable debug logging in dash.js by calling player.getDebug().setLogToBrowserConsole(true) if you are using your own page.

[349930] Getting the request for video time : 378 
[349932] Index for video time 378 is 188 
[349933] SegmentTemplate: 376 / 596.362 
[349935] Getting the next request at index: 189 
[349935] SegmentTemplate: 378 / 596.362
[352295] Buffered Range for type: video : 296.48  -  346.68

[352309] Getting the request for video time : 380 
[352310] Index for video time 380 is 189 
[352311] SegmentTemplate: 378 / 596.362 
[352313] Getting the next request at index: 190 
[352316] SegmentTemplate: 380 / 596.362 
[352914] AbandonRequestsRule (  video frag id 190 ) is asking to abandon and switch to quality to  0  measured bandwidth was 476 
[352922] Init fragment finished loading saving to video's init cache 
[352924] Buffered Range for type: video : 296.48  -  346.68 

[352927] Getting the request for video time : 381 
[352927] Index for video time 381 is 190 
[354137] Buffered Range for type: video : 296.48  -  348.68 

[354152] Getting the request for video time : 348.682 
[354154] Index for video time 348.682 is 173 
[354156] SegmentTemplate: 346 / 596.362 
[354158] Getting the next request at index: 174 
[354159] SegmentTemplate: 348 / 596.362 
[354709] Buffered Range for type: video : 296.48  -  348.68

[354711] Executing ThroughputRules. http://192.168.168.200/dashbig/237k_175.m4s 
[354712] lastRequestThroughput is  1203673  lastRequestBytes is  73725  downloadTimeInMilliseconds is  490

[354723] Getting the request for video time : 348.68100000000004 
[354727] Index for video time 348.68100000000004 is 173 
[354728] SegmentTemplate: 346 / 596.362 
[354730] Getting the next request at index: 174 
[354731] SegmentTemplate: 348 / 596.362 
[354761] Buffered Range for type: video : 296.48  -  348.68

[354811] Executing ThroughputRules. http://192.168.168.200/dashbig/237k_175.m4s 
[354812] lastRequestThroughput is  196600000  lastRequestBytes is  73725  downloadTimeInMilliseconds is  3

[354818] Getting the request for video time : 348.727975 
[354828] Index for video time 348.727975 is 173 
[354830] SegmentTemplate: 346 / 596.362 
[354832] Getting the next request at index: 174 
[354833] SegmentTemplate: 348 / 596.362 
[354985] Buffered Range for type: video : 296.48  -  348.68 

[354987] Executing ThroughputRules. http://192.168.168.200/dashbig/237k_175.m4s 
[354988] lastRequestThroughput is  8547826  lastRequestBytes is  73725  

[354999] Getting the request for video time : 348.68100000000004 
[355000] Index for video time 348.68100000000004 is 173 
[355001] SegmentTemplate: 346 / 596.362 
[355004] Getting the next request at index: 174 
[355005] SegmentTemplate: 348 / 596.362 
[355029] Buffered Range for type: video : 296.48  -  348.68

[355032] Executing ThroughputRules. http://192.168.168.200/dashbig/237k_175.m4s 
[355033] lastRequestThroughput is  58980000  lastRequestBytes is  73725  downloadTimeInMilliseconds is  10

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