Setup Setup the CSharpGuitarBugs web site as described in Lab 1 and Lab 2. Download and install most recent version of Debug Diagnostics,from here. Also check debugdiag.com Instructions Debugging a process crash is a challenging activity. Although you know the exception type, the exceptions error message and you know the method that it is being […]
Read More →I have written an article here that explains how to install and configure Failed Request Tracing. Please use that for reference. In this lab you will: Install the Failed Request Tracing (Tracing) role Configure Failed Request Tracing Capture and review the Failed Request Trace If you have not completed the previous labs, specifically Lab 2, […]
Read More →
There is a really cool new Azure App Service Web App tool called appLens that is explained in more detail here. Open it by selecting the Settings –> AppLens from the App Service you are interested in analyzing, similar to that shown in Figure 1. Figure 1, AppLens shows this is an application issue not […]
Read More →
I wrote this article that discussed how to monitor the different instances of an Azure App Service. As you know, when you access the KUDU console, as I discussed here, you are accessing only 1 of the multiple instances, which may or may not be having a problem. So, if you take a memory dump […]
Read More →When accessing your Azure App Service Web App, if you receive an HTTP 500 response, similar to that shown in Figure 1, first step is to add or modify the customErrors attribute and set the mode property to Off, as shown in Figure 2. Figure 1, Azure Web App returns a 500 Figure 2, change […]
Read More →On a web server with multiple application pools, there most likely will be multiple W3WP processes. Therefore, the first action to take when creating a memory dump of a W3WP worker process is to find which one you need to get the dump of. I wrote a short article on how to get a worker […]
Read More →Once you have captured a memory dump, instead of, or in addition to using WinDbg to analyze the memory dump, you can use a tool called DebugDiag which can be downloaded here. I discuss how to capture a memory dump in numerous ways here. After installing the debugging tool, make sure have opened the Debug […]
Read More →
When you are experiencing slowness with your ASP.NET application, one place to check is if the application is being recycled. If the application is being recycled over and over again, then sessions and application settings are lost and it has a pretty big impact on your users and customers. A place to begin your investigation […]
Read More →To setup Failed Request Tracing on an IIS 8.5 Server Core server, follow these steps. Start PowerShell Install the Web-Http-Tracing Role, using Install-WindowsFeature Configure the rule via a Remote Management IIS connection How to configure an IIS Server Core server for remote management Start PowerShell When you login to a Service Core installation of Windows […]
Read More →When you look in the HTTP Error log (c:\Windows\System32\LogFiles\HTTPERR) and see a lot of Connection_Dropped_List_Full error reasons logged, it means that the client has dropped the connection so many times, in a short period, that the log in which the dropped connections are stored has become full. You might also see numerous 200.0.64 HTTP Status […]
Read More →