Simple one but a question that Google is failing to help with. In IIS logging, the field time. Is this the time IIS received the request or the time it responded?
#Software: Microsoft Internet Information Services 6.0
#Version: 1.0
#Date: 2013-03-04 08:32:02
#Fields: date **time** s-sitename s-computername
IIS Advanced Logging uses the W3C log file format to log information about all sites on the server
Time-Local
Logs the time at which the request occurred, in local time.
Time-UTC
Logs the time at which the request occurred, in UTC.
http://technet.microsoft.com/en-us/library/ee791933(v=ws.10).aspx
Related
This is a similar post to Azure Web App Trace logs not appearing in log, however the original poster seems to have abandoned the question without resolving/accepting an answer.
I am trying to trace an issue that only happens on the Azure web app (now called app service). I'm unable to perform any remote debugging due to our company policies, so tracing is our best tool.
However, I've tried following various tutorials, but I still can't seem to get any of my trace information logged.
I've tried:
Setting the Application Logging (Filesystem) Level to Verbose, Information, Error -- nothing.
Looking for the logs in
the FTP server at /LogFiles/Application
the KUDU interface at https://.scm.azurewebsites.net and again, navigated to /LogFiles/Application
portal's Monitoring > Live stream (the section under Diagnostic Logs for the website)
Nada. I've even waited a few hours (thinking it might be a delay), and still nothing.
I setup a very basic hello world ASPX and all it does (in the Page_Load) is try to write 'hello' to the trace log using
Trace.TraceError
Trace.TraceInformation
Trace.TraceWarning
Trace.WriteLine
Console.Out.WriteLine
Console.Error.WriteLine
Some weird stuff I've also tried
setting my debug=true in my web.config
setting CustomErrors from RemoteOnly to Off
trying to use System.Diagnostics.TextWriterTraceListener
Anyone have any ideas I might try?
Exceptions in your live web app are reported by Application Insights. You can correlate failed requests with exceptions and other events at both the client and server, so that you can quickly diagnose the causes. You may refer this article: https://learn.microsoft.com/en-us/azure/application-insights/app-insights-asp-net-exceptions.
If you use NLog, log4Net or System.Diagnostics.Trace for diagnostic tracing in your ASP.NET application, you can have your logs sent to Azure Application Insights, where you can explore and search them. Your logs will be merged with the other telemetry coming from your application, so that you can identify the traces associated with servicing each user request, and correlate them with other events and exception reports. You may refer this article: https://learn.microsoft.com/en-us/azure/application-insights/app-insights-asp-net-trace-logs.
My application is deployed on IIS 7. I want to check the number of failures as my logic is getting failed at some point and getting errors.Is there any general weblogs in IIS.I can only see system errors in the event logs. Is there any web logs?
Manually trawling the standard W3C logs is ok if you're chasing down requests for certain content types, but they won't tell you an awful lot about why your web application is failing and responding with many 4XX and 5XX status codes. You'll get a status code, but that's about it.
Failed Request Tracing:
Your "go to" diagnostic tool should be the Failed Request Tracing feature that is built into IIS7+.
FRT is one of my favourite features of IIS7/8 for tracking down problems with production sites, especially when debugging apps built on the WebAPI and Ajaxy type stuff.
For more information see:
http://www.iis.net/learn/troubleshoot/using-failed-request-tracing
For example, last week FRT helped me get to the bottom of an issue with a client's hosted site. A particular part of the site (which uses the WebAPI) was failing with a 405 Method Not Allowed status code when making a HTTP DELETE request and despite the DELETE verb being permitted.
Using FRT I was able to generate trace of the failing request which showed me this:
Expanding the "View Trace" entries revealed this error:
The solution for our customer was to disable (it's not used) the WebDAV native module which doesn't permit non-Windows authenticated requests with certain verbs (such as DELETE) to complete. Even if the WebDAV module isn't handling the request it's still in the request pipeline inspecting and validating request headers.
Failed Request Tracing is a really invaluable diagnostic tool, you should learn how to use it.
The HTTPERR Logs:
You should also check the HTTPERR logs located in:
C:\Windows\System32\LogFiles\HTTPERR
If you get 503 - Service Unavailable errors they're a good place to look for clues as to what went wrong if an application pool fails catastrophically, and often.
The is a folder named 'logs' in your 'inetpub' folder where all the logs live. You can look at the Logging tab under IIS in IIS Manager to see the name of the specific log you should check for your site.
I had written a mini App in asp classic this week. It worked perfectly on the test server connecting to the test data base. Then yesterday evening I moved it from the test server to the live server updating the connection strings to the live db.
I published it as an application to the default website in the default app pool. Then I tested it and it worked perfectly.
This morning however both myself and another user receive a 500 -internal Server error when we try and save changes to the database(there appears to be no issue reading from the db) yet my two other collogues have no issue at all.
Even more odd is that the same thing is happening on the test server where the code hasn't been changed in weeks. But this morning I cannot commit to the db from there either.
I have attempt to enable more detailed error tracking and logging but the property options for the server are seem unavailable when i tried to set up custom Active Server Pages (ASP) error pages off online tutorials.
The server is used by a lot of people so I was wondering is their a permission issue depending on the user that restricts writting to the database. Or something else that may have changed to allow some users to write data and others to receive the error.
Im very knew to IIS so it may be something glaringly obvious that I haven't considered.
Thanks
This article should help you:
In earlier versions of IIS, error messages from classic ASP scripts
were sent to a Web browser, by default. Because these error messages
might reveal sensitive information to malicious users, IIS 7 and above
disables this feature by default. When your classic ASP scripts
encounter an error in IIS, you receive the following error message by
default:
An error occurred on the server when processing the URL. Please contact the system administrator.
If you are the system administrator please click here to find out more about this error.
I'm trying to figure out why I'm getting 500 errors in setting up a website in IIS.
So far I've tried the following steps:
Enabled Failed Request Tracing (Doesn't write logs for this site, but
works for other sites)
Enabled detailed error messages. Still Getting the default 500 page
with no additional information.
Give app pool full permission to the project directory.
Made sure app pool was running on classic .NET 2 (old app)
Running the site under a permutation of (Classic/Integrated, .NET
2/4)
Enabled anonymous authentication
So my thinking is, somehow, the site fails before the logging modules are ran.
I suspect this is the case because I see no new entities in Event Viewer, IIS Advanced Logs folder, Or in Failed Request Tracing folder. My only source of information (besides 500 error) is a new entry in the IIS log:
2012-12-04 13:06:05 127.0.0.7 GET / - 80 - 127.0.0.1 Mozilla/5.0+(compatible;.....)
To verify this, is there a way to check which stage of the pipeline a request failed? Is it possible to run the logging modules before the failure occurs?
There is a trace event logger for HTTP.sys. With this you can determine if the request is even making it to the right app pool in IIS. Direction on usage
As a last resort, Microsoft offers a tool called Debug Diagnostic. When you have no other option, use this. It will produce a crash dump of the app pool of your choice. Not easy to go through, but it’s a lead. Direction on usage
I'd like to use my IIS logs to track sessions in my app, but don't have a session key being pushed along the querystring in my pages.
What's the easiest way to start tracking that in the log - put a querystring value in the iis logs, or is there a way to append session to the logs as a custom field?
Using 32-bit classic asp against windows server 2003 64-bit.
IIS (since version 5, at least) lets you log cookies in the "W3C Extended" log file format. Add the "cs-cookie" field to your logs and restart your website, they'll appear there.
You will need log analysis software that supports tracing sessions via the cs-cookie field, however - but it largely isn't necessary as most log analysis follows paths-through-site and sessions by tracing the cs-referer header instead.
If you have large cookie strings then expect your site log files to balloon in size.