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Container Time Drift

Container time drift occurs when container time differs from host time, causing TLS failures and timestamp issues.

Quick answer

Container time drift occurs when container time differs from host time, causing TLS failures and timestamp issues.

Infrastructure#time-drift#ntp#container#infrastructure#scheduling

What this failure is

Container Time Drift is a Infrastructure failure seen during ML training runs. Container time drift occurs when container time differs from host time, causing TLS failures and timestamp issues. Common tags: Time Drift, Ntp, Container, Infrastructure.

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Why it happens (the mechanism)

Container time not synced. NTP not running in container. Timezone misconfiguration. Container start time drift. Taken together, these mechanisms explain why the failure is reproducible, why it tends to surface on specific workloads or scales, and why generic mitigation attempts often fall short without addressing the underlying cause.

What you'll observe

  • TLS certificates fail in container
  • Logged timestamps are wrong
  • Schedules fire at wrong time

Common symptoms and what they mean

SymptomWhy it happens
Container time differs from hostContainer time not synced
Clock skew in distributed trainingNTP not running in container
Schedules based on time failTimezone misconfiguration

Which systems are affected

  • Kubernetes deployments
  • Long-running containers
  • Containers with checkpoint timestamps

How to confirm this is the problem

Use this checklist to test the hypothesis against a small reproduction. No single line proves the root cause, so preserve the preceding events and compare one variable at a time.

  • ✓Reproduce the failure from a clean checkpoint/seed: the symptom must appear without warm-up state from a previous run.
  • ✓Verified signal present: Container time differs from host
  • ✓Verified signal present: Clock skew in distributed training
  • ✓Verified signal present: Schedules based on time fail
  • ✓A targeted fix from the "How to fix it" section eliminates or substantially reduces the symptom within one validation pass.

The fix and the prevention pattern

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Related failures to investigate next

Lambda Bgp Route Withdrawal Region Outage often co-occurs with this failure because both share underlying assumptions about infrastructure; if you fix this entry but still see drift, validate the related primary cause next. lambda bgp route withdrawal region outage →
Kubernetes Gpu Pod Pending often co-occurs with this failure because both share underlying assumptions about infrastructure; if you fix this entry but still see drift, validate the related neighboring cause next. kubernetes gpu pod pending →
Slurm Node Oom often co-occurs with this failure because both share underlying assumptions about infrastructure; if you fix this entry but still see drift, validate the related neighboring cause next. slurm node oom →

Root cause

  • Container time not synced
  • NTP not running in container
  • Timezone misconfiguration
  • Container start time drift

The fix and how to prevent it

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References

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