[tor-bugs] #16907 [Onionoo]: Stop returning a 500 Internal Server Error when the hourly updater has not run for 6+ hours

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#16907: Stop returning a 500 Internal Server Error when the hourly updater has not
run for 6+ hours
-------------------------+------------------------------
 Reporter:  karsten      |          Owner:
     Type:  enhancement  |         Status:  needs_review
 Priority:  Medium       |      Milestone:
Component:  Onionoo      |        Version:
 Severity:  Normal       |     Resolution:
 Keywords:               |  Actual Points:
Parent ID:               |         Points:
  Sponsor:               |
-------------------------+------------------------------

Comment (by fmap):

 I observed another severe downtime event on the evening of Silvester:

 http://hack.rs/~vi/onionoo/outage-2015-12-31.svg
 sha256: ead6b6f11406cc89f12bd25a7a7217bf7d9a61433b87ae91260f5f8fa93e62f6
 http://www.webcitation.org/6eFD7EJo0

 Though I'm uncertain whether it was accountable to this bug, or something
 else. In hopes of better attributing future downtime events, I've extended
 my monitoring script to record the difference between the current time and
 `relays_published`; the idea being that downtimes associated with this bug
 will be preceded by a sequence of (successful) responses with a delta
 leading up to six hours:

 http://hack.rs/~vi/onionoo/OnionooMonitor.hs
 sha256: 34c441f8aa08a7f445cd2e8088f0285d5735f74a47ce112f4facf15d7029d202
 http://www.webcitation.org/6eFDa1ta1

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16907#comment:11>
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