ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData, Boolean applyTransientFaultHandling) The original link How to troubleshoot: “An error occurred while starting the application” in ASP.The first step is to make sure that your computer is connected to internet (Wi-Fi or Ethernet) and reload the webpage by clicking on the Reload icon. SqlException x80131904 (0) : user ‘sa’ login failed. Example 1: Dependency file missing Application startup exception: System.ArgumentException: The directory name D:Database connection error Application startup exception: System. When the record finds the cause and resolves, change the above true back to false. If there are no logs in the root directory of the site, to create them manually, see the link in the original article. Open web.config under the website Instead of The logs directory is then used to see the cause and then to resolve it. So your web.config’s aspNetCore element should look something like thisĭoing this will log all the requests out to this file and when the exception occurs, it will give you the full stack trace of what happened in the \logs\stdout_*.log file Note – you will want to turn this off after you’re done troubleshooting, as it is a performance hit. Run your request again, then open the \logs\stdout_*.log file.The “stdout” part of the value “.\logs\stdout” actually references the filename not the folder.If you forget to create the logs folder, an error will be logged to the Event Viewer that says: Warning: Could not create stdoutLogFile \\?\YourPath\logs\stdout_timestamp.log, ErrorCode = -2147024893.Unfortunately, the AspNetCoreModule doesn’t create the folder for you by default.Instead of the Event Viewer, if you’re running behind IIS, we can log the request out to a file. How to figure what happened (if running on IIS) This is because Event Logging must be wired up explicitly and you’ll need to use the package, and depending on the error, you might not have a chance to even catch it to log to the Event Viewer. You’ll notice that the error is not there. If you’re running on Windows and behind IIS, you might immediately go to the Event Viewer to see what happened based on your previous ASP.NET knowledge. Something went wrong in your Program.cs or Startup.cs before any exception handling kicked inĮvent Viewer (probably) won’t show you anything.NET Core version installed on the server. It basically means something really bad happened with your app. “An error occurred while starting the application.NET Framework | version | Microsoft Windows ”
If you’ve ever seen this message when hitting your ASP.NET Core app:
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