SolidWallOfCode commented on pull request #7069:
URL: https://github.com/apache/trafficserver/pull/7069#issuecomment-667443501


   Hrrrrm. I was specifically requested to detect and prevent direct looping on 
parent selection. A complaint about the original logic was it failed to detect 
exactly this situation. So it's breaking you by design (which in a sense is 
good, because that proves it solved one of the two problems the PR was 
addressing). 
   
   Since your stuff is currently experimental, and this fixes current 
production problems, I think we should merge it and then look for a fix for 
you. You'll have to hash it out with @vmamidi and his crew. I will ponder some 
approaches. Off the cuff,
   
   *  plugin API to disable the self loop check.
   *  configuration variable (which, frankly, will end up being the same as the 
previous).
   *  something in the HostDB/DNS record that says "OK to loop".
   *  something set by parent selection in this case to disable the check.


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