fix: self-healing patch for CrashLoopBackOff in crash-test-55b8b665f4-hjqjs

[aftabkh4n]

Self-Healing Patch

This PR was opened automatically by the self-healing-k8s system.

Failure detected

• Pod: crash-test-55b8b665f4-hjqjs
• Namespace: default
• Type: CrashLoopBackOff
• Detected at: 2026-04-20 06:19:34 UTC

Root cause

The .NET application is unable to establish a connection to the PostgreSQL database at postgres://db:5432. The pod enters CrashLoopBackOff because the application fails to start when database connectivity cannot be established, causing repeated restart attempts with increasing backoff delays.

Severity

Critical

Suggested fix

1. Verify the PostgreSQL service is running and accessible at hostname 'db' on port 5432 within the default namespace. 2. Check DNS resolution by exec'ing into the pod and pinging 'db'. 3. Verify the PostgreSQL pod is in Running state and healthy. 4. Confirm network policies are not blocking traffic between crash-test and database pods. 5. Check PostgreSQL credentials and connection string configuration. 6. Implement startup probes and retry logic in the .NET application to gracefully handle temporary database unavailability instead of crashing immediately.

Proposed code change

Modify the .NET startup code to implement retry logic with exponential backoff:

var retryPolicy = Policy.Handle().Or().WaitAndRetry(retryCount: 5, sleepDurationProvider: attempt => TimeSpan.FromSeconds(Math.Pow(2, attempt)), onRetry: (outcome, timespan, retries, context) => { Console.WriteLine($"Retry {retries} after {timespan.TotalSeconds}s due to: {outcome.Exception.Message}"); });

await retryPolicy.ExecuteAsync(async () => { using var connection = new NpgsqlConnection(connectionString); await connection.OpenAsync(); });

Alternatively, configure a startup probe in the deployment YAML to delay traffic until the app is ready.

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