This and the previous alert were caused by two spikes in client polls: one around 8:22 UTC and a larger one at 8:50 UTC. I don't know what the cause in the spike was, but it didn't appear to be isolated to IPs from a single country. On 2026-02-10 03:58, alertmanager--- via anti-censorship-alerts wrote:

[FIRING:1] Snowflake drop of client polls (hetzner-nbg1-02.torproject.org critical anti-censorship)

1 alert for alertname=Snowflake drop of client polls View in Alertmanager <http://hetzner-nbg1-02:9093/#/alerts?receiver=anti-censorship+team> *[1] Firing* *Labels* alertname = Snowflake drop of client polls monitor = hetzner-nbg1-02.torproject.org severity = critical team = anti-censorship *Annotations* description = This might mean a problem in our signaling channels, or some other thing blocking clients to reach the broker playbook = https://gitlab.torproject.org/tpo/anti-censorship/team/-/issues/161 summary = There is a considerable drop on snowflake client polls title = Snowflake drop of client polls Source <https://prometheus2.torproject.org/graph?g0.expr=sum%28increase%28snowflake_rounded_client_poll_total%5B5m%5D%29%29+%2F+sum%28increase%28snowflake_rounded_client_poll_total%5B5m%5D+offset+10m%29%29+%3C+0.5&g0.tab=1>

Sent by Alertmanager <http://hetzner-nbg1-02:9093>

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