[MacPorts] #60509: Upgrading ports sometimes breaks internet connection

[MacPorts]

#60509: Upgrading ports sometimes breaks internet connection
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  Reporter:  iEFdev  |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  base    |    Version:  2.6.2
Resolution:          |   Keywords:
      Port:          |
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Comment (by ryandesign):

 Replying to [comment:8 jmroot]:
 > Replying to [comment:4 ryandesign]:
 > > Possible solutions:
 > >
 > > 1. We could trim the list of perl cpan [https://github.com/macports
 /macports-ports/blob/master/_resources/port1.0/fetch/mirror_sites.tcl
 mirrors] to a more reasonable number.
 > > 2. MacPorts base could spawn only a `ping` process for each host and
 perform the equivalent of the `grep` and `cut` commands using Tcl string
 processing.
 >
 > Why not both? :-)

 I agree; we can work on any and all of these items.

 Yet another idea might be:

 4. MacPorts base could have a hard upper limit of the number of hosts for
 which it will check ping times at a time, say 50 or 100. If there are more
 hosts than that such as in the case of perl, MacPorts could pick 50 or 100
 hosts from the list at random (although maybe the MacPorts mirrors should
 always be included). Ideally any excess hosts that were not checked would
 be marked for immediate recheck, so that if a user upgrades several perl
 modules at once then for the first module maybe not all hosts were pinged
 but by the second or third module all of the pingtimes are known.

 > > 3. MacPorts base could limit the number of hosts that it checks
 simultaneously.
 >
 > That's not easy to do correctly and efficiently. The pings are run in
 parallel so that the overall time for the check is not the sum of the
 individual response times (which may be up to 3 seconds in case of a
 timeout).

 I agree, that's why I'm starting with the easier task with (2).

-- 
Ticket URL: <https://trac.macports.org/ticket/60509#comment:9>
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