Azure WebApp : DaaS Application Crashes No instance name mentioned.

Question

Recently we have observed application crashes in one of our web app. and from DaaS, earlier we could get to know the instance name that has been crashed on checking application crashes tab. Recently when we look, the instance name is not provided. I have a few questions on this :

1. Is this a recent change? If Yes, then how do we get to know which instance crashed?
2. Apart from enabling crash monitoring and wait for the next crash to happen is there any other way to do an RCA what caused the crash?

The webapp is hosted in windows server in p2v3 tier with 4 instances auto scale out rule settings and the our application is ASP.NET MVC application built on .NET Framework 4.8.

Answer 1

SachinVettiyattil-3127, Apologies for the delay here over the weekend.

Do you recall making any changes prior to this issue?
Is this issue specific to 1 WebApp or happens on other WebApp (in case, you have tested DAAS crash info)? On which region is your WebApp hosted?

Due to the nature of the issue- application crash, investigating the underlying cause helps with RCA.

Just to highlight, in most cases, it’s an application related issue. The crash of a process happens when the process terminates due to an unhandled exception within the application code.

The Application Crash does show instance name. Kindly do post a screenshot of the issue after concealing any private details.

Yes, Proactive Crash Monitoring is the best feature that could leverage – for process crashes and collects diagnostic data that helps you determine the root cause of the crash.

You may checkout other Diagnostic options, “Application Changes”, “High CPU Analysis”, and “Memory Analysis”, to corelate the app crash/ instance details. Also, you may enable troubleshoot-diagnostic-logs to fetch more details about the issue.

Kindly let us know how it goes, I’ll follow-up with you further.