How to Fix DatabaseError in .NET In Production

Nothing disrupts a coding session quite like an unexpected DatabaseError in .NET. Here's how to diagnose and fix it.

Root Cause

A DatabaseError in production typically means your application can't communicate with the database. Common causes include incorrect connection strings, connection pool exhaustion, missing migrations, or network issues between your app and the database server.

Step-by-Step Fix

The key is to enable retry-on-failure and set command timeouts in your EF Core configuration:

// Program.cs
builder.Services.AddDbContext<AppDbContext>(options =>
    options.UseNpgsql(builder.Configuration.GetConnectionString("Default"),
        npgsql => {
            npgsql.EnableRetryOnFailure(maxRetryCount: 3);
            npgsql.CommandTimeout(30);
        }));

// appsettings.Production.json
// Ensure connection string uses environment variable
// "ConnectionStrings": { "Default": "${DATABASE_URL}" }

Common Pitfall

Before diving into code changes, double-check your environment variables and .NET version. Version mismatches between local and in production environments are a frequent source of this error. While you're at it, check if your logging captures enough context around this error to speed up debugging next time.

Validate the Solution

Verify by triggering the same action that caused the original error. In .NET, you can also enable verbose logging temporarily to confirm the fix is applied correctly. Once verified, remove or reduce the logging level to keep your logs clean in production.

Stay Ahead of Errors

Tools like [Bugsly](https://bugsly.dev) can catch these .NET errors in real time, giving you stack traces and context to fix issues faster.