#32576: Fix race condition in snowflake broker -------------------------------------+--------------------------- Reporter: cohosh | Owner: cohosh Type: defect | Status: assigned Priority: Very High | Milestone: Component: Circumvention/Snowflake | Version: Severity: Normal | Resolution: Keywords: metrics | Actual Points: Parent ID: | Points: Reviewer: | Sponsor: Sponsor28 -------------------------------------+---------------------------
Old description: > Looks like the snowflake broker isn't serving metrics since 2019-11-14 > (which happens to coincide with the host migration. > > At first I thought this was a DNS issue and filed #32570, but even when I > manually fetch https://snowflake-broker.torproject.net/metrics I'm > getting outdated metrics. > > I've attached the result of the above fetch as well as the metrics file > located on the snowflake broker host that the broker *should* be reading > from. New description: There is a race condition with the snowflake heap that has been causing the broker to crash several times a day. This race condition has existed in the broker for several years, but some recent updates as well as the host migration managed to shake it loose. ---- This race condition is causing the snowflake broker to crash repeatedly and often since the migration. We noticed because CollecTor stopped collecting metrics since the restart on 14 November 2019. -- Comment (by cohosh): Just updating the summary of this ticket to reflect the actual problem. -- Ticket URL: <https://trac.torproject.org/projects/tor/ticket/32576#comment:6> Tor Bug Tracker & Wiki <https://trac.torproject.org/> The Tor Project: anonymity online
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