the most recently restarted dirauths appear to run Tor 0.2.6.1-alpha-dev, including four of the five US-based dirauths (moria1, Faravahar, urras, dizum). gabelmoo, tor26, longclaw, Tonga, and maatuska appear to be running Tor 0.2.5.10. dannenberg is running Tor 0.2.5.9-rc.
How often do they tend to restart usually? (For instance, I'd be unsurprised to hear e.g. that Roger tests his commits on his dirauth, and so that server never has high service uptime, or something.)
i don't want to speak for roger, but my general understanding over the past few years was that roger typically appeared to run fresher alpha code on a sister relay named moriatoo (https://atlas.torproject.org/#details/5C91CC4554CA2EE1904BA6...) before upgrading moria1.
but at the moment, moriatoo is running 0.2.6.0-alpha-dev and moria1 is running 0.2.6.1-alpha-dev
roger's dirauth (author of the post) moria1 (US) restarted ~1d ago and shows a blip in traffic earlier today, which may or may not have something to do with the post: https://atlas.torproject.org/#details/9695DFC35FFEB861329B9F...
peter's tor26 (austria) restarted 12h ago: https://atlas.torproject.org/#details/847B1F850344D7876491A5...
dizum (netherlands) was also recently restarted 16h ago: https://atlas.torproject.org/#details/7EA6EAD6FD83083C538F44...
Tonga (netherlands) looks mostly normal, restarted ~7d ago: https://atlas.torproject.org/#details/4A0CCD2DDC7995083D73F5...
sebastian's gabelmoo (germany) restarted 2d ago: https://atlas.torproject.org/#details/F2044413DAC2E02E3D6BCF...
CCC's dannenberg (germany) restarted 3d ago: https://atlas.torproject.org/#details/7BE683E65D48141321C5ED...
jake's urras (US) is showing relatively low bandwidth & restarted ~2d ago: https://atlas.torproject.org/#details/0AD3FA884D18F89EEA2D89...
Faravahar (US) restarted 4d ago: https://atlas.torproject.org/#details/CF6D0AAFB385BE71B8E111...
riseup's longclaw (US) restarted 9d ago: https://atlas.torproject.org/#details/74A910646BCEEFBCD2E874...
linus's maatuska (sweden) has been up for 30d: https://atlas.torproject.org/#details/BD6A829255CB08E66FBE7D...
recent activity in tor's commit log may also offer up some clues: https://gitweb.torproject.org/tor.git/log/?showmsg=1