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Common Kerberos Authentication Failures Explained

Authentication failures are a specific kind of frustrating. The application is running. The network is up. The credentials are correct. And yet: access denied. The system is doing exactly what it was told to do — which is precisely the problem. The customer reported a 383ms latency on authentication. There were no errors of any…

Solving Memory Leaks in Azure App Services

41 Zombie Domains and a 10.7GB Memory Dump: Inside a FileSystemWatcher Storm Some cases arrive already on fire. This was one of them. The customer was a customer running a .NET application on Azure App Service. The application was recycling. Not occasionally, continuously. And it was leaking memory at a rate that had produced a…

Avoiding Health Check Failures in Java Applications

The 30-Second Misconfiguration That Held a Deployment Hostage There is a special category of production bug that hides in plain sight. It doesn’t crash anything. It doesn’t throw an exception you can grep for. It just quietly prevents your infrastructure from doing what it’s supposed to do, and it waits patiently while you stare at…

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