Incident Library
Applied filters Root causeSoftware defectSymptomDNS resolution failuresFactorSignal buried in noiseClear allEvery case under the filters, with no sentence; newest first.
Suggested filters Search, and the values found in your words appear here.

Graph

  • Root cause
  • Component
  • Symptom
  • Contributing factor
  • Case

Cases1 case

1 to 1 of 1

  1. IL-0359 Queries to Gandi LiveDNS timed out when two crashed anycast DNS nodes kept announcing all three name server addresses
    Gandi2020
    Symptoms

    On 16 July 2020 between 13:26 and 13:48 UTC, DNS queries to two nodes of Gandi's LiveDNS platform failed with a timeout, and retries against the other name servers of a domain failed as well. The status page reported impact for FR customers.

    DNS resolution failures
    Trigger

    A software bug in Gandi's DNS server software triggered a fault and stopped the server on two LiveDNS nodes.

    Root cause
    Software defect
    Component
    Authoritative DNS servers and recordsBGP routing
    Contributing factor
    Single point of failureSignal buried in noiseOverlapping failures
    Detection

    Monitoring alerts fired on the DNS servers, but they were first read as false positives among the noise from an earlier internal network incident.

    Action items
    • Fix the way a node is disabled when its DNS server is not working correctly
    • Fix the node configuration and add monitoring so that no node announces several clusters
    • Rework monitoring and internal training and organisation
    • Deploy the fix for the bug in the DNS server software
    View case
Check your cluster for this

This case involves BGP routing and Authoritative DNS servers and records. kubegap audits a Kubernetes cluster for gaps like these, read-only, from Claude Code or Codex; its checks cite public reports like the ones in this library.

Open kubegap

By root cause1

Software defect1 case

Component
BGP routingAuthoritative DNS servers and records
Contributing factor
Signal buried in noiseOverlapping failuresSingle point of failure
Organisation
Gandi
  1. IL-0359 Queries to Gandi LiveDNS timed out when two crashed anycast DNS nodes kept announcing all three name server addresses
    Gandi2020