maskit opened a new issue #7554:
URL: https://github.com/apache/trafficserver/issues/7554


   According to @masaori335 's comments on #7491 and #7511, it sounds like 
`cqpv` log field doesn't have a valid protocol name used in a tunnel. TLS 
partial blind tunnel ignores the issue and uses another field (`cqssa`) to log 
protocol names.
   
   If we can't / don't log protocol names used in tunnels to `cqpv`, it should 
be documented and the value should be `-` but not misleading garbage value.
   
   And I also think using `cqssa` as an alternative field has two problems. We 
should probably log protocol names to `cqpv` on tunnel connections as well.
   
   Log size -- To collect protocol names used for the both tunnel connections 
and non-tunnel connections you need to log two fields, and either of them is 
always redundant or garbage. It unreasonably increases log size.
   Readability -- Looking at different log fields depending on connection type 
is hard. Also `cqssa` has protocol IDs but not human friendly protocol names. 
It requires log readers more knowledge.
   


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