[metrics-bugs] #27050 [Metrics/Onionoo]: Reverse DNS lookups are still slow

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#27050: Reverse DNS lookups are still slow
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 Reporter:  irl              |          Owner:  irl
     Type:  defect           |         Status:  needs_revision
 Priority:  Medium           |      Milestone:
Component:  Metrics/Onionoo  |        Version:
 Severity:  Normal           |     Resolution:
 Keywords:                   |  Actual Points:
Parent ID:                   |         Points:
 Reviewer:  karsten          |        Sponsor:
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Comment (by irl):

 Replying to [comment:5 karsten]:
 > > * The NodeStatus serialization is extended to include verified and
 unverified host names
 >
 > What exactly is the user-visible effect of this change? Should it go
 into the change log, too?

 No user-visible impact, but it changes the format of an internal document
 type. I also have a Python implementation of the NodeStatus document
 serialization for testing which required updating to interpret the new
 fields. This would not go in the changelog.

 > > * The last reverse DNS lookup time is now only updated on successful
 lookups
 >
 > This sounds potentially user-visible, too. Change log entry?

 The last lookup time is not served in the documents. Maybe it should be?
 It's not a user-visible change unless they look closely. A missing reverse
 name is treated as a failure and tried again on the next update, a success
 is only tried again after 12 hours.

 > Do you mind adding these change log entries in another commit?

 I'll do this shortly.

 > I'll start a local test run now. Assuming that it succeeds, should we
 put out 6.2-1.17.0 tomorrow?

 I wasn't sure if we should wait until 7.0 or not. This change doesn't
 violate protocol 6.2 as the host_name field is optional and I guess as
 it's mostly broken anyway it doesn't make much of a difference doing the
 update sooner.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27050#comment:6>
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