I am desperately trying to debug an error 500 only when I try to update an object from my xamarin.Forms offline DB to Azure. I am using Azure Mobile Client.
I set all the logging to ON in azure, then I downloaded the log. I can see the generic error, but nothing useful.
<failedRequest url="https://MASKED:80/tables/Appel/9A3342A2-0598-4126-B0F6-2999B524B4AE"
siteId="Masked"
appPoolId="Masked"
processId="6096"
verb="PATCH"
remoteUserName=""
userName=""
tokenUserName="IIS APPPOOL\Masked"
authenticationType="anonymous"
activityId="{80000063-0000-EA00-B63F-84710C7967BB}"
failureReason="STATUS_CODE"
statusCode="500"
triggerStatusCode="500"
timeTaken="625"
xmlns:freb="http://schemas.microsoft.com/win/2006/06/iis/freb"
>
The table that failed is the only one I extend with some virtual runtime calculated field of navigation field. But I add the [JsonIgnore] to stop AzureService to create field in the local DB (that work) or send it on the wire to the server. But I always got the 500 error, not exception when debugging the c# Azure backend too.
How I can find the stack trace or the "deep" reason for this 500 error in my backend?
For C# Mobile App backend, you could add the following code in the ConfigureMobileApp method of your Startup.MobileApp.cs file for including error details and return to your client side.
config.IncludeErrorDetailPolicy = IncludeErrorDetailPolicy.Always;
You could just capture the exception in your mobile application or leverage fiddler to capture the network traces when invoking the PATCH operation to retrieve the detailed error message.
Moreover, you are viewing the Failed Request Traces log, you need to check the Application logs. Details you could follow Enable diagnostics logging for web apps in Azure App Service.
Related
we are created new development environment so I cloned a current working app service into a new one and changed the configurations and deployed same code but the new app service is returning HTTP Error 500.30 - ANCM In-Process Start Failure
after trying the console for more details that's what I get, I don't think its related to runtime identifier because same code runs on different exact app services
The dreaded 500.3x ACNM error can mean different things, so I'm going to assist you in pinpointing those things.
My recommendation:
Go to Azure Portal > Your App Service > development tools
Open console.
Screen should look like this:
Console Screen Azure
Type in (YourWebAppName).exe
What this will do, is show error messages that are relevant to your startup issue.
Also, some information regarding errors can be seen here:
https://learn.microsoft.com/en-us/aspnet/core/test/troubleshoot-azure-iis?view=aspnetcore-3.1#app-startup-errors
I have an ASP.NET Core 3.1 solution deployed into an Azure Web App hooked up to Application Insights. I can't for the life of me get exceptions and stack traces to log into Application Insights, instead I get a basic request trace with no exception information attached:
I've tried most combinations of setting up logging/application insights telemetry, here are some of the things I've tried:
services.AddApplicationInsightsTelemetry(); in the ConfigureServices() method of Startup.cs
Adding logging.AddApplicationInsights(); to my logging builder in Program.cs
Removing the custom error page exception handler in case that was affecting things
I have the APPINSIGHTS_INSTRUMENTATIONKEY environment variable set on my Web App in Azure.
I'm using the following code to generate exceptions in Application Insights:
[AllowAnonymous]
[Route("autoupdate")]
public async Task<IActionResult> ProfileWebhook()
{
var formData = await this.Request.ReadFormAsync();
var config = TelemetryConfiguration.CreateDefault();
var client = new TelemetryClient(config);
client.TrackException(new Exception(string.Join("~", formData.Keys)));
logger.LogError(new Exception(string.Join("~", formData.Keys)), "Fail");
throw new Exception(string.Join("~", formData.Keys));
}
Nothing is working and I'm going crazy! Any help greatly appreciated.
Usually, Application insights will guarantee that all the kinds of telemetries(like exceptions, trace, event etc.) will be arrived around 5 minutes, please refer this doc: How long does it take for telemetry to be collected?. But there is still a chance that it will take a longer time due to beckend issue(a very small chance).
If you're using visual studio, you can check if the telemetry is sent or not via Application Insights search.
You can also check if you're using a correct IKey, or if you have enabled sampling.
But if it keeps this behavior in your side, you should consider contacting MS support to find the root cause.
Hope it helps.
I have a node server running on Google Cloud Run. Now I want to enable stackdriver tracing. When I run the service locally, I am able to get the traces in the GCP. However, when I run the service as Google Cloud Run, I am getting an an error:
"#google-cloud/trace-agent ERROR TraceWriter#publish: Received error with status code 403 while publishing traces to cloudtrace.googleapis.com: Error: The request is missing a valid API key."
I made sure that the service account has tracing agent role.
First line in my app.js
require('#google-cloud/trace-agent').start();
running locally I am using .env file containing
GOOGLE_APPLICATION_CREDENTIALS=<path to credentials.json>
According to https://github.com/googleapis/cloud-trace-nodejs These values are auto-detected if the application is running on Google Cloud Platform so, I don't have this credentials on the gcp image
There are two challenges to using this library with Cloud Run:
Despite the note about auto-detection, Cloud Run is an exception. It is not yet autodetected. This can be addressed for now with some explicit configuration.
Because Cloud Run services only have resources until they respond to a request, queued up trace data may not be sent before CPU resources are withdrawn. This can be addressed for now by configuring the trace agent to flush ASAP
const tracer = require('#google-cloud/trace-agent').start({
serviceContext: {
service: process.env.K_SERVICE || "unknown-service",
version: process.env.K_REVISION || "unknown-revision"
},
flushDelaySeconds: 1,
});
On a quick review I couldn't see how to trigger the trace flush, but the shorter timeout should help avoid some delays in seeing the trace data appear in Stackdriver.
EDIT: While nice in theory, in practice there's still significant race conditions with CPU withdrawal. Filed https://github.com/googleapis/cloud-trace-nodejs/issues/1161 to see if we can find a more consistent solution.
I got an "500 Internal Server Error - An error occurred while starting the application" after deploying my application: https://iidapp.azurewebsites.net/
I keep finding the following error message but I am unable to find out on msdn websites any information describing how I can specify the SAS URL
INFO: The app was working for a long period and I didn't have to set the SAS URL; I wonder why suddenly Azure is generating exceptions
INFO2: the app works perfectly on my local machine
Any help is welcomed as I couldn't find any solution by reading the related topics on stackoverflow
2017-04-05T18:51:32
System.ApplicationException: The trace listener AzureBlobTraceListener is disabled. ---> System.InvalidOperationException: The SAS URL for the cloud storage account is not specified. Use the environment variable 'DIAGNOSTICS_AZUREBLOBCONTAINERSASURL' to define it.
at Microsoft.WindowsAzure.WebSites.Diagnostics.AzureBlobTraceListener.RefreshConfig()
--- End of inner exception stack trace ---
An error was triggered by W3SVC-WP : {app name}02000780
I found out on eventid that the code 02000780 meant that a file was missing
I eventually found out that it was possible to log further information by enabling the stdoulog inside the web.config. Read When a .NET Core Azure App Service won’t start: 502.5 Process Failure
I opened the debug console and found out that a directory wasn't found https://{app_id}.scm.azurewebsites.net/DebugConsole
Voilà! I corrected the code and the app is up and running!
I am attempting to obtain a data feed from yahoo finance. I am doing this with the following code:
System.Net.WebRequest request = System.Net.WebRequest.Create(http://download.finance.yahoo.com/download/quotes.csv?format=sl&ext=.csv&symbols=^ftse,^ftmc,^ftas,^ftt1x,^dJA);
request.UseDefaultCredentials = true;
// set properties of the request
using (System.Net.WebResponse response = request.GetResponse())
{
using (System.IO.StreamReader reader = new System.IO.StreamReader(response.GetResponseStream()))
{
return reader.ReadToEnd();
}
}
I have placed this code into a console application and, using Console.WriteLine on the output I receive the information I require. I have used the 'Run as..' command to execute this using a specific domain account.
When I use this code from within a Page load I receive the following error message "No connection could be made because the target machine actively refused it 76.13.114.90:80".
This seems to suggest that the call is reaching yahoo (is this true?) and that there is something missing.
This would suggest there is an identity difference in the calls between the console application and application pool.
Environment is: Windows Server 2003, IIS 6.0, .net 4.0
"Target machine actively refused it" indicates that the TCP connection itself is not succeeding. This could be due to the fact that the Proxy settings when run under IIS are not the same as those that apply when you run in the console.
You can fix this by setting a WebProxy on your request, that points to the proxy server being used in the environment.
Yes, an active refusal is indication that the target machine is receiving the request and the information in the headers is either incorrect or insufficient to process the request. It is entirely possible that if you had to run this call using a "run as" command in console that the application pool's identity user does not have the appropriate permission or username. You can attempt to change the identity user to this specific domain account to see if that alleviates the problem, but you may have to isolate this particular function into its own application pool in order to protect the rest of the website from having this specification.