Failed Requests App Insights¶

Use this query in Application Insights (workspace-based) to inspect failed HTTP requests and operation context.

Data Source¶

Query Pipeline¶

flowchart LR
    A[Filter by cloud role name] --> B[Filter failed requests] --> C[Project operation metadata] --> D[Sort by time]

Query¶

let AppName = "my-container-app";
requests
| where cloud_RoleName == AppName
| where success == false
| project timestamp, name, resultCode, duration, operation_Id
| order by timestamp desc

Example Output¶

Interpretation Notes¶

• operation_Id links failed request to traces and exceptions.
• resultCode helps split ingress/proxy errors from app exceptions.
• Normal pattern: low failed-request ratio aligned with SLO.

Limitations¶

• Requires App Insights instrumentation and sampling awareness.
• High sampling can hide low-frequency failures.

See Also¶

• Link Exceptions to Operations
• Ingress Not Reachable Playbook