Where Does Iis 7.5 Log Errors

Where does IIS 7.5 log errors?

To report errors in Event Viewer, go to your php.ini file and make sure logging is on.

log_errors = On

Then enable error_log to write to syslog (with is Event Viewer on a Windows machines)

error_log = syslog

Where do logs go when running ASP.NET Core on IIS 7.5?

You could probably check the Event Viewer on your machine -> Application to see if there are any errors logged, which could explain why your log files aren't being generated.

However, the most probable reason is that IIS doesn't have a permission to write to that log folder.

1. Right click on the folder -> Security
2. Ensure that IIS_IUSRS user has the following permissions: read and execute, list, write (potentially write is missing by default)

IIS: Where can I find the IIS logs?

I think the default place for access logs is

%SystemDrive%\inetpub\logs\LogFiles

Otherwise, check under IIS Manager, select the computer on the left pane, and in the middle pane, go under "Logging" in the IIS area. There you will se the default location for all sites (this is however overridable on all sites)

You could also look into

%SystemDrive%\Windows\System32\LogFiles\HTTPERR

Which will contain similar log files that only represents errors.

How to see asp.net EVENT errors in IIS 7.5?

we are using something like this in a small ASP.NET application we have:

protected void Application_Error(object sender, EventArgs e)
{
    // Code that runs when an unhandled error occurs

    try
    {
        var userName = "<USERNAME not available...>";

        if (HttpContext.Current != null && HttpContext.Current.User != null && HttpContext.Current.User.Identity != null)
        {
            userName = HttpContext.Current.User.Identity.Name;
        }

        Exception exc = Server.GetLastError();

        var logger = new IEMLogger();

        logger.Error(string.Format("Application_Error - user: {0}", userName), exc);

        // Clear the error from the server
        Server.ClearError();
    }
    catch (Exception /*exc*/)
    {
        // DOES NOTHING:
        // no recursive error reports in case the logging fails...
    }
}

this is using a very defensive approach checking also for context null, current user null and so on. the IEMLogger is our wrapper to LogçNet so we do not have dependencies of LogçNet spread all around...

Edit: please notice that this Application_Error event handler in Global.asax is the last resort of exception handler you should have, this catches all unhandled exceptions but does NOT replace the try/catch blocks you should have anyway in your application classes. Have those try catch as needed in the code of your application and use the same approach with a logger class which logs the exceptions at the very places where exceptions are thrown... this depends on your overall approach to exception and error handling, then if you go for Log4Net, NLog or other loggers everything is really a detail...

IIS 7.5 500 24 50 41 error on log

reinstalling .net again and then running aspnet_regiis.exe -i which locates in C:\Windows\Microsoft.NET\Framework64\v4.0.30319 solved the problem

PHP error log on IIS does not write to file

Adding this as a solution text so that it no longer appears on the Unanswered questions list. Answer is provided by question author in the edited question above:

Edit: [SOLVED]

I was using BasicAuthentication for my website and there the IIS
impersonates the user you are logging in with. Therefore I just added
my log on user account to the IIS_IUSRS group and now it works.

Will all requests that appear in HttpErr logs also appear in the IIS logs, by default?

The HTTPErr.log files is where HTTP.SYS logs its messages. That is before the IIS/website stage of the request pipeline, so you cannot match HTTPerr.log file entries with IIS' website logfiles. However, almost any HTTPErr.log error message indicates a script or site error, therefor it's wise to investigate all sites and scripts that appear in the HTTPErr.log files.

Microsoft explains the HTTP Request Processing in IIS on iis.net and there is also documentation of the Kinds of errors that the HTTP API logs.

IIS 7.5 web site containing web services where one of the web services returns a 401 error

The answer to my problem was rebooting my server. Still never got a definitive why the issue was occurring.

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