Chronosphere: finding flapping Prometheus endpoints with a PromQL gap pattern

TL;DR

Use timestamp() and unless() with a 5-minute offset to spot gaps: query the metric and take the complement of the same metric offset by 5 minutes.

Fix

1. Use timestamp() and unless() with a 5-minute offset to spot gaps: query the metric and take the complement of the same metric offset by 5 minutes. Expected: you can confirm this matches your situation.

When to use

• You are setting up or using this Chronosphere feature.
• The symptom matches: finding flapping Prometheus endpoints with a PromQL gap pattern.

When NOT to use

• Unrelated Chronosphere issues (different feature, different failure).
• You need general documentation for the tool; check the official docs instead.

Compatibility

Reported against Chronosphere. Source: https://docs.chronosphere.io/investigate/querying/metrics/troubleshooting.

Variant phrasings

finding flapping Prometheus endpoints with a PromQL gap pattern

Why it happens

Metrics go missing intermittently and you need a repeatable way to see when a Prometheus endpoint stopped emitting.

Edge cases

• If your error message differs even slightly, this is probably a different issue; search the exact text.
• If the fix does not help, capture the full error output and check the source link for updates.

Source

https://docs.chronosphere.io/investigate/querying/metrics/troubleshooting

Source: Metrics go missing intermittently and you need a repeatable way to see when a Prometheus endpoint stopped emitting.

Verified resolution: [Chronosphere docs]: use timestamp() and unless() with a 5-minute offset to spot gaps: query the metric and take the complement of the same metric offset by 5 minutes. Points only plot where the metric is missing now but was present 5 minutes ago, so filled portions mark outage windows and their length marks duration. To alert on missing metrics, look for values greater than zero in that pattern.

Source URL: https://docs.chronosphere.io/investigate/querying/metrics/troubleshooting