Diagnose errors and exceptions with Azure Application Insights - Azure Monitor (2023)

  • Article

Exceptions in web applications can be reported withApp Insights. You can associate failed requests with exceptions and other events on the client and server, allowing you to quickly diagnose root causes. In this article, you'll learn how to set up exception reporting, explicitly report exceptions, diagnose errors, and more.

Set up exception reports

You can set Application Insights to report on exceptions that occur on the server or client. Depending on the platform your app depends on, you'll need the appropriate extension or SDK.

server side

For your server-side application to report exceptions, consider the following scenarios:

  • addApplication Insights extensionza Azure Web Apps.
  • addApplication monitoring extensionza Azure Virtual Machines i Azure Virtual Machine Scale Sets IIS hostirane aplikacije.
  • InstallApplication Insights SDKIn the application code, run:Application Insights-Agentfor the IIS web server or enable themJava agentfor Java web applications.

buyer's side

The JavaScript SDK provides client-side reporting of exceptions that occur in web browsers. For information about setting up exception reporting on the client, seeInsights into web applications.

application frameworks

Some application frameworks require more configuration. Consider the following technologies:

  • web formula
  • MVC
  • Web-API 1.*
  • Web-API 2.*
  • WCF


This article focuses specifically on .NET Framework applications from a code sample perspective. Some of the methods that work for the .NET Framework are deprecated in the .NET Core SDK. For more information see.NET Core SDK documentationwhen creating applications with .NET Core.

Diagnose exceptions using Visual Studio

Open the application solution in Visual Studio. Run the application either on your server or on your development machine usingF5. Recreate the exception.

open itApplication Insights-SucheTelemetry window in Visual Studio. Select an option when debuggingApp Insightsdrop down field.

Select an exception report to view its stack trace. To open the corresponding code file, select the line reference in the stack trace.

(Video) Episode #67 - Working with Azure Application Insights for Exception Logging

If CodeLens is enabled, the exception information is displayed:

Diagnose errors using the Azure portal

Application Insights provides a curated application performance management experience that helps you diagnose failures in your monitored applications. First in the Application Insights resource menu on the left belowInvestigation, choosefailurePossibility.

You can see error rate trends for your requests, how many fail, and how many users are affected. TheIn totalThe display shows some of the most useful distributions specific to the selected failed operation. You'll see the three most common response codes, the three most common exception types, and the three most common failed dependency types.

To view representative samples for each of these subsets of operations, select the associated link. For example, to diagnose exceptions, you can select the number of a specific exception to display withDetails of end-to-end transactionstab.

Instead of looking at the exceptions of a particular failed operation, you can start with thatIn totalSee exceptions by switching toexceptionstab above. Here you can see all exceptions logged for your monitored application.

Custom tracking and log data

To get diagnostic data specific to your application, you can include code to send your own telemetry. Your custom telemetry or log data will appear in the diagnostic search along with the request, page view, and other automatically collected data.

UseMicrosoft.VisualStudio.ApplicationInsights.TelemetryClientSeveral APIs are available to you:

  • TelemetryClient.TrackEventit's usually used to track usage patterns, but the data it sends is also shown belowCustom eventswhen looking for a diagnosis. Events are named and can contain string properties and numeric metrics that you can useFilter your diagnostic searches.
  • TelemetryClient.TrackTraceallows sending longer data such as POST information.
  • TelemetryClient.TrackExceptionsends exception details eg B. Stack traces, to Application Insights.

To view these events, open the menu on the leftLook for. Select the drop-down menuevent types, and then selectCustom event,Persecute, orException.


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If your application generates a lot of telemetry data, the adaptive sampling engine will automatically reduce the amount sent to the portal by sending only a representative portion of the events. Events that are part of the same process are selected and unselected as a group, allowing you to navigate between related events. For more information seeSampling in Insights.

See Request for POST data

Request details do not include data sent to your application in a POST call. To report this information:

  • Install the SDKin your application project.
  • Paste the invitation code into your applicationMicrosoft.ApplicationInsights.TrackTrace(). Send the POST data in the message parameter. Since the allowed size is limited, try to send only essential data.
  • If you investigate the failed request, you will find its traces.

Record exceptions and associated diagnostic data

First of all, the portal doesn't show you all the exceptions that lead to errors in your application. If you are using a browser, you will be shown all browser exceptionsJavaScript-SDKon your web pages. However, most server exceptions are caught by IIS and you have to write a bit of code to see them.

You can:

  • Explicitly note exceptionsby injecting code into exception handlers to report exceptions.
  • Automatically catch exceptionsby configuring your ASP.NET framework. Required accessories vary depending on the type of frame.

Report exceptions explicitly

The easiest way to apply is to turn on the call totrackException()in the exception handler.

pokušaj{ // ...}catch (ex){ appInsights.trackException(ex, "handler loc", { Game: currentGame.Name, State: currentGame.State.ToString() });}
var telemetry = new TelemetryClient();try{ // ...}catch (Exception ex){ var Properties = new Dictionary{ ["Game"] = currentGame.Name }; varmeasurements = new Dictionary{ ["Korisnici"] = currentGame.Users.Count }; // Ausnahmetelemetrie senden: telemetry.TrackException(ex, Properties,measurements);}
Dim telemetry = New TelemetryClientTry ' ...Catch ex as Exception ' Richten Sie einige Eigenschaften ein: Dim Properties = New Dictionary (Of String, String) Properties.Add("Game", currentGame.Name) Dimmeasurements = New Dictionary (Of String) , Double)measurements.Add("Users", currentGame.Users.Count) 'Senden Sie die Ausnahmetelemetrie: telemetry.TrackException(ex, Properties,measurements)End Try

The "Properties" and "Measurements" parameters are optional, but useful forFilter and addAdditional information. For example, if you have an application that can run multiple games, you can find all exception reports related to a specific game. You can add as many items as you want to each dictionary.

Browser exceptions

Most browser exceptions are reported.

If your website contains script files from content delivery networks or other domains, make sure the script tag has an attributecrossorigin="anonymous"and which the server sendsCORS-Header. This behavior allows you to obtain stack traces and details about unhandled JavaScript exceptions from these resources.

Reuse your telemetry client


We recommend that you instantiate itTelemetryClientstore once and reuse over the lifetime of the application.

SDependency Injection (DI) u .NET, the appropriate .NET SDK, and the correct configuration of Application Insights for DI, you can request itTelemetryClientas a constructor parameter.

javna klasa ExampleController: ApiController{ private readonly TelemetryClient _telemetryClient; public ExampleController(TelemetryClient telemetryClient) { _telemetryClient = telemetryClient; }}

In the previous example,TelemetryClientis injectedExampleControllerClass.

web formula

For web forms, the HTTP engine can catch exceptions if no redirects are configuredCustom errors. However, if you have active redirects, add the following linesapplication errorfunction inGlobal.asax.cs.

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void Application_Error(object sender, EventArgs e){ if (HttpContext.Current.IsCustomErrorEnabled && Server.GetLastError () != null) { _telemetryClient.TrackException(Server.GetLastError()); }}

In the previous example,_telemetryClientis a class variable of typeTelemetryClient.


Starting with Application Insights Web SDK version 2.6 (Beta 3 and later), Application Insights automatically catches unhandled exceptions thrown in MVC 5+ controller methods. If you have previously added a custom handler to catch such exceptions, you can remove it to prevent duplicate exception handling.

There are several scenarios where the exception filter may not properly handle errors when throwing exceptions:

  • Controller designers
  • From the message handler
  • Beim Routing
  • During serialization of response content
  • When starting the application
  • For background tasks

All exceptionsnamireniafter application it must still be monitored manually. Unhandled exceptions originating from the controller typically result in a 500 "Internal Server Error" response. If such a response is manually constructed as a result of a handled exception or no exception, it will be tracked in the appropriate request telemetryresult code500. However, the Application Insights SDK cannot trace the corresponding exception.

Support for previous versions

If you are using MVC 4 (and earlier) from Application Insights Web SDK 2.5 (and earlier), see the following examples for exception tracking.

Such asCustom errorsconfiguration isFrom, Exceptions will be available forHTTP-modulcollect. However, if it isOnly at a distance(default) orAn, the exception is thrown and is not available for automatic collection by Application Insights. You can fix this behavior by overriding itKlasa System.Web.Mvc.HandleErrorAttributeand applying an overridden class as shown here for different MVC versions (seeGitHub-Quelle):

using System;using System.Web.Mvc;using Microsoft.ApplicationInsights;namespace MVC2App.Controllers{ [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, Inherited = true, AllowMultiple = true)] public class AiHandleErrorAttribute : HandleErrorAttribute { public override void OnException (ExceptionContext filterContext) { if (filterContext != null && filterContext.HttpContext != null && filterContext.Exception != null) { //The attribute should only track exceptions if CustomErrors is set to On. //If CustomErrors is set to Off, exceptions will occur. Catches the AI ​​HTTP module if (filterContext.HttpContext.IsCustomErrorEnabled) { //Or reuse the instance (recommended!). See note above. var ai = new TelemetryClient(); ai.TrackException(filterContext.Exception); } } base.OnException(filterContext); } }}


Replace the HandleError attribute with your new attribute in your controllers:

namespace MVC2App.Controllers { [AiHandleError] public class HomeController : Controller { // omitted for brevity } }

In the end


to registerAiHandleErrorAttributeas a global filter inGlobal.asax.cs:

javna klasa MyMvcApplication: System.Web.HttpApplication{ public static void RegisterGlobalFilters(GlobalFilterCollection filter) { filter.Add(new AiHandleErrorAttribute()); }}

In the end

MVC 4, MVC 5

to registerAiHandleErrorAttributeas a global filter inFilterConfig.cs:

public class FilterConfig{ public static void RegisterGlobalFilters(GlobalFilterCollection filter) { // Default value replaced by override to handle unhandled exceptions filter.Add(new AiHandleErrorAttribute()); }}

In the end


Starting with Application Insights Web SDK version 2.6 (Beta 3 and later), Application Insights automatically catches unhandled exceptions thrown in controller methods for Web API 2+. If you have previously added a custom handler to catch such exceptions, as described in the following examples, you can remove it to prevent exceptions from being caught twice.

There are several cases that exception filters cannot handle. For example:

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  • Exceptions thrown by controller constructors.
  • Exceptions thrown by message handlers.
  • Exceptions that occur during routing.
  • Exceptions thrown while serializing response content.
  • An exception is raised when the application is launched.
  • Background tasks throw an exception.

All exceptionsnamireniafter application it must still be monitored manually. Unhandled exceptions originating from the controller typically result in a 500 "Internal Server Error" response. If such a response is manually constructed due to a handled exception or due to the absence of an exception, it will be tracked in the appropriate request telemetryresult code500. However, the Application Insights SDK cannot trace the corresponding exception.

Support for previous versions

If you are using Application Insights Web SDK 2.5 (and earlier) Web API 1 (and earlier), see the following examples for exception tracing.

Web-API 1.x


using System.Web.Http.Filters;using Microsoft.ApplicationInsights;namespace WebAPI.App_Start{ public class AiExceptionFilterAttribute : ExceptionFilterAttribute { public override void OnException(HttpActionExecutedContext actionExecutedContext) { if (actionExecutedContext != null && actionExecutedContext. Iznimka != null) { / /Oder Instanz wiederverwenden (empfohlen!). Siehe Hinweis oben. var ai = new TelemetryClient(); ai.TrackException(actionExecutedContext.Exception); } base.OnException(actionExecutedContext); } }}

You can add this overridden attribute to specific controllers or add it to the global filter configuration in theWebApiConfigClass:

using System.Web.Http;using WebApi1.x.App_Start;namespace WebApi1.x{ public static class WebApiConfig { public static void Register(HttpConfiguration config) { config.Routes.MapHttpRoute( name: "DefaultApi", routeTemplate: "api/ {kontroler}/{id}", Standardwerte: new { id = RouteParameter.Optional }); // ... config.EnableSystemDiagnosticsTracing(); // Prikaz podataka za Application Insights erfassen: config.Filters.Add(new AiExceptionFilterAttribute()); } }}

In the end

Web-API 2.x

Add an implementationIExceptionLogger:

using System.Web.Http.ExceptionHandling;using Microsoft.ApplicationInsights;namespace ProductsAppPureWebAPI.App_Start{ public class AiExceptionLogger : ExceptionLogger { public override void Log(ExceptionLoggerContext context) { if (context != null && context.Exception != null) { / /ili ponovno upotrijebite instancu (preporučeno!). vidi napomenu iznad var ai = new TelemetryClient(); ai.TrackException(context.Exception); } base.Log(kontekst); } }}

Add this snippet to services inWebApiConfig:

using System.Web.Http;using System.Web.Http.ExceptionHandling;using ProductsAppPureWebAPI.App_Start;namespace WebApi2WithMVC{ public static class WebApiConfig { public static void Register(HttpConfiguration config) { // Web-API-Konfiguration und -Dienste // Web-API-Routen config.MapHttpAttributeRoutes(); config.Routes.MapHttpRoute( name: "DefaultApi", routeTemplate: "api/{controller}/{id}", defaults: new { id = RouteParameter.Optional }); config.Services.Add(typeof(IExceptionLogger), new AiExceptionLogger()); } }}

In the end

As an alternative, you can:

  • Replace the only oneexception handlerAn instance with a custom implementationIExceptionHandler. This exception handler is only called when the framework can still choose which response message to send, not for example when the connection is terminated.
  • Use exception filters as described in the previous section on Web API 1.x controllers, which are not called in all cases.


Add a class to be extendedAttributeand carried outIErrorHandlerIIServiceBehavior.

korištenje sustava; sa System.Collections.Generic; sa System.Linq; using System.ServiceModel.Description; sa System.ServiceModel.Dispatcher; sa System.Web; Korištenje Microsoft.ApplicationInsights; namespace WcfService4.ErrorHandling { public class AiLogExceptionAttribute: Attribute, IErrorHandler, IServiceBehavior { public void AddBindingParameters(ServiceDescription serviceDescription, System.ServiceModel.ServiceHostBase serviceHostBase, System.Collections.ObjectModel.Collectionkrajnje točke, System.ServiceModel.Channels.BindingParameterCollection bindingParameters) { } public void ApplyDispatchBehavior(ServiceDescription serviceDescription, System.ServiceModel.ServiceHostBase serviceHostBase) { foreach (ChannelDispatcher disp in serviceHostBase.ChannelDispatchers) { disp.Error Rukovatelji.Dodaj(ovo); } } public void Validate(ServiceDescription serviceDescription, System.ServiceModel.ServiceHostBase serviceHostBase) { } bool IErrorHandler.HandleError(Exception error) { //ili ponovno upotrijebi instancu (preporučeno!). vidi napomenu iznad var ai = new TelemetryClient(); ai.TrackException(greška); vratiti lažno; } void IErrorHandler.ProvideFault(greška izuzetka, verzija System.ServiceModel.Channels.MessageVersion, Ref. System.ServiceModel.Channels.Message error) { } } }

Add an attribute to service implementations:

namespace WcfService4{ [AiLogException] public class Service1 : IService1 { // omitted for brevity }}

In the end

Exception counters

Ako yesinstalirao Azure Monitor Application Insights AgentYou can get a graph of the exception rate measured by .NET on your server. Both handled and unhandled .NET exceptions are included.

Open the Metric Explorer tab and add a new chart. Under, underperformance indicators, chooseexceptional rate.

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The .NET Framework calculates the rate by counting the number of exceptions in an interval and dividing by the length of the interval.

This number is different from the number of exceptions calculated by the Application Insights portal countTrackExceptionreports. The sampling intervals are different and the SDK is not broadcastingTrackExceptionReports for all handled and unhandled exceptions.

Next steps

  • Track REST, SQL, and other dependency calls
  • Track page load times, browser exceptions, and AJAX calls
  • Monitor performance counters


How do I see exceptions in Azure application Insights? ›

Open the Application Insights Search telemetry window in Visual Studio. While debugging, select the Application Insights dropdown box. Select an exception report to show its stack trace. To open the relevant code file, select a line reference in the stack trace.

Which Azure monitoring tool allows you to detect and diagnose issues across applications and dependencies and Monitor your live applications? ›

Azure Monitor.

Collects and analyzes performance metrics as well as diagnostic and activity logs from cloud environments to determine application availability and performance. Azure Monitor can also provide insight into the operation of applications, containers and VMs running in the cloud.

What are the limitations of Azure Monitor? ›

Data collection rules
Maximum number of data flows10
Maximum number of data streams10
Maximum number of extensions10
Maximum size of extension settings32 Kb
6 more rows
Apr 13, 2023

Which feature of Azure Monitor can diagnose issues by using powerful analytics tools? ›

The Change Analysis user interface in the Azure portal gives you insight into the cause of live site issues, outages, or component failures. Change Analysis uses the Azure Resource Graph to detect various types of changes, from the infrastructure layer through application deployment.

How do I check exceptions? ›

A checked exception is caught at compile time whereas a runtime or unchecked exception is, as it states, at runtime. A checked exception must be handled either by re-throwing or with a try catch block, whereas an unchecked isn't required to be handled.

How do I Monitor Azure Application Insights? ›

The easiest way to get started consuming Application insights is through the Azure portal and the built-in visual experiences. Advanced users can query the underlying data directly to build custom visualizations through Azure Monitor dashboards and workbooks.

What are the three main functions of Azure Monitor? ›

Collect, analyze, and act on telemetry data from your cloud and hybrid environments.

How do you detect and diagnose in Azure? ›

Triage and diagnose an alert

You can also open the Azure portal, navigate to the Application Insights resource for your app, and open the Failures page. Clicking on 'Diagnose failures' will help you get more details and resolve the issue.

What is the feature of Azure Monitor used for application monitoring? ›

Microsoft combined three unique services—Azure Monitor, Log Analytics, and Application Insights—under the umbrella of Azure Monitor to provide powerful end-to-end monitoring of your applications and the components they rely on. Log Analytics and Application Insights are now features of Azure Monitor.

What are the two main kinds of data Azure Monitor works with? ›

What data types does Azure Monitor collect?
  • Application data: Data that relates to the custom application code. ...
  • Operating System data: Data regarding the operating system in which the application is running i.e., data from the Windows or Linux virtual machines that host your application.

Can Azure Monitor detect threats? ›

Azure Advanced Threat Protection (ATP) cloud service helps protect your organization from insider threats and compromised identities. It constantly monitors the domain controllers and analyzes events. It identifies threat patterns and their source, both on-premises and in the cloud.

How many types of data does Azure Monitor collect? ›

Azure Monitor collects data from various sources. These sources include logs and metrics from the Azure platform and resources, custom applications, and agents running on virtual machines.

Which are the two possible destinations for diagnostic logs in Azure Monitor? ›

With Azure diagnostic logs, you can view core analytics and save them into one or more destinations including:
  • Azure Storage account.
  • Log Analytics workspace.
  • Azure Event Hubs.
Feb 28, 2023

Which Azure tool is recommended to troubleshoot errors and performance bottlenecks? ›

PerfInsights is the recommended tool from Azure support for VM performance issues. It's designed to cover best practices and dedicated analysis tabs for CPU, Memory, and I/O. You can run it either OnDemand through the Azure portal or from within the VM, and then share the data with the Azure support team.

What are the benefits of Azure Monitor? ›

Azure Monitor is a powerful reporting and analytics tool. Azure Monitor maximizes the supply and performance of your applications and services by delivering an inclusive solution for collecting, analyzing, and working on telemetry from the user's cloud and on-premises environments.

What are three examples of checked exceptions? ›

Compare checked vs. unchecked exceptions
CriteriaUnchecked exceptionChecked exception
List of examplesNullPointerException, ClassCastException, ArithmeticException, DateTimeException, ArrayStoreExceptionClassNotFoundException, SocketException, SQLException, IOException, FileNotFoundException
4 more rows
Apr 18, 2022

How do you identify errors and exceptions in code? ›

If you place your mouse on the method in your program code and hit F2, you will see if that method will throw exceptions and which ones it will throw. The methods printStackTrace() and e. getmessage() can be used to help you find and understand which exceptions are occurring.

What are exceptions how many types of exceptions are there? ›

An exception is an event which causes the program to be unable to flow in its intended execution. There are three types of exception—the checked exception, the error and the runtime exception.

What is the difference between Azure Monitor and Log Analytics? ›

Azure Monitor builds on top of Azure Log Analytics, the platform service that gathers log and metrics data from all your resources. The easiest way to think about Azure Monitor vs Log Analytics is that Azure Monitor is the marketing name, whereas Azure Log Analytics is the technology that powers it.

What is difference between Log Analytics and application insights? ›

It's probably easiest to think of Log Analytics as being the raw database and tables for Log data and App Insights is a set of views aimed at providing useful views on your applications' telemetry data.

What is the difference between application insights SDK local and Azure application insights? ›

So basically, Application Insights SDK will add to your project and configure it, whereas Azure Application Insights will add connection settings in your project.

What are the three alert states in Azure Monitor? ›

Alert severity
Sev 0Critical
Sev 1Error
Sev 2Warning
Sev 3Informational
1 more row
Mar 9, 2023

What are the 3 types of Azure roles? ›

Azure roles
  • Owner – Full rights to change the resource and to change the access control to grant permissions to other users.
  • Contributor – Full rights to change the resource, but not able to change the access control.
  • Reader – Read-only access to the resource.
May 18, 2021

What are the 3 types of roles in Microsoft Azure? ›

Account Administrator, Service Administrator, and Co-Administrator are the three classic subscription administrator roles in Azure.

What is the difference between diagnostic settings and application Insights? ›

There is no difference in the data. The data from Insights can be viewed directly as opposed to having to build the views over the data exported by Diagnostics Settings yourself.

How do I test an alert in Azure Monitor? ›

Check the alert processing rule status field to verify that the related action role is enabled. By default, the portal rule list only shows rules that are enabled, but you can change the filter to show all rules. If it is not enabled, you can enable the alert processing rule by selecting it and clicking Enable.

How do I find vulnerabilities in Azure? ›

From the Azure portal, open Defender for Cloud. From Defender for Cloud's menu, open the Recommendations page. Select the recommendation Machines should have a vulnerability assessment solution.

What are the roles in Azure Monitor? ›

Azure Monitor provides two out-of-the-box roles: Monitoring Reader and Monitoring Contributor. Azure Monitor Logs also provides built-in roles for managing access to data in a Log Analytics workspace, as described in Manage access to Log Analytics workspaces.

What is the purpose of application monitoring? ›

Application monitoring is the process of collecting log data in order to help developers track availability, bugs, resource use, and changes to performance in applications that affect the end-user experience (UX).

What is the purpose of Azure monitoring alerts? ›

Alerts help you detect and address issues before users notice them by proactively notifying you when Azure Monitor data indicates there might be a problem with your infrastructure or application. You can alert on any metric or log data source in the Azure Monitor data platform.

What is the difference between Azure Monitor and metrics? ›

Azure Monitor Metrics is a feature of Azure Monitor that collects numeric data from monitored resources into a time-series database. Metrics are numerical values that are collected at regular intervals and describe some aspect of a system at a particular time.

How long are Azure Monitor activity logs kept 90 days 30 days 120 days? ›

Activity log events are retained in the Azure platform for 90 days.

What is the difference between Azure Monitor workbook and dashboard? ›

Azure dashboards are useful in providing a "single pane of glass" of your Azure infrastructure and services. While a workbook provides richer functionality, a dashboard can combine Azure Monitor data with data from other Azure services.

What are two methods that detect threats in Azure? ›

Azure offers built in threat protection functionality through services such as Azure Active Directory (Azure AD), Azure Monitor logs, and Microsoft Defender for Cloud. This collection of security services and capabilities provides a simple and fast way to understand what is happening within your Azure deployments.

What is the difference between Azure Health and Azure Monitor? ›

Azure Monitor helps you understand how your applications are performing and proactively identifies issues affecting them and the resources they depend on. Azure Service Health helps you stay informed and take action when Azure service issues like outages and planned maintenance affect you. So what's the difference?

What is the difference between Azure Advisor and Azure Monitor? ›

Azure Advisor provides personalized recommendations to optimize Azure resources for performance, security, reliability, and cost-effectiveness. On the other hand, Azur Monitor provides a platform for collecting, analyzing, and acting on telemetry data generated by Azure resources and applications.

How long does Azure Monitor keep data? ›

You can keep data in interactive retention between 4 and 730 days. You can set the archive period for a total retention time of up to 2,556 days (seven years). To set the retention and archive duration for a table in the Azure portal: From the Log Analytics workspaces menu, select Tables.

What is data collection rules in Azure Monitor? ›

Data collection rules (DCRs) define the data collection process in Azure Monitor. DCRs specify what data should be collected, how to transform that data, and where to send that data. Some DCRs will be created and managed by Azure Monitor to collect a specific set of data to enable insights and visualizations.

How to enable diagnostics in Azure Monitor data collection? ›

For a single resource, select Diagnostic settings under Monitoring on the resource's menu. For one or more resources, select Diagnostic settings under Settings on the Azure Monitor menu and then select the resource. For the activity log, select Activity log on the Azure Monitor menu and then select Diagnostic settings.

Does Azure Monitor use log analytics? ›

Log Analytics is a tool in the Azure portal to edit and run log queries from data collected by Azure Monitor logs and interactively analyze their results. You can use Log Analytics queries to retrieve records that match particular criteria, identify trends, analyze patterns, and provide various insights into your data.

How does Azure Monitor organize log data for queries? ›

Azure Monitor Logs is based on Azure Data Explorer, and log queries are written by using the same Kusto Query Language (KQL). This rich language is designed to be easy to read and author, so you should be able to start writing queries with some basic guidance.

How do I troubleshoot Azure performance issues? ›

For each check below, look for key trends when the issues occur within the time range of the issue.
  1. Check Azure storage availability – Add the storage account metric: availability. ...
  2. Check for Azure storage timeout - Add the storage account metrics.
Oct 7, 2022

Which two tools can be used to troubleshoot Azure Files connectivity? ›

  • Python.
  • .NET.
  • JavaScript.
  • Java.
  • Go.
Apr 13, 2023

Which Azure monitoring tool allows you to detect and Diagnose issues across applications and dependencies and monitor your live applications? ›

Azure Monitor.

Collects and analyzes performance metrics as well as diagnostic and activity logs from cloud environments to determine application availability and performance. Azure Monitor can also provide insight into the operation of applications, containers and VMs running in the cloud.

How do I check for multiple exceptions? ›

In Python, try-except blocks can be used to catch and respond to one or multiple exceptions. In cases where a process raises more than one possible exception, they can all be handled using a single except clause.

What is the exception rate in application insights? ›

Exception rate : The Exception rate is a system performance counter. The CLR counts all the handled and unhandled exceptions that are thrown and divides the total in a sampling interval by the length of the interval. The Application Insights SDK collects this result and sends it to the portal.

How do I catch exceptions in Azure logic app? ›

To catch exceptions in a Failed scope and run actions that handle those errors, you can use the "run after" setting that Failed scope. That way, if any actions in the scope fail, and you use the "run after" setting for that scope, you can create a single action to catch failures.

How do I view Azure errors? ›

Sign in to Azure portal. Go to Resource groups and select the deployment's resource group name. Select Activity log. Use the filters to find an operation's error log.

How do you handle multiple exceptions in a single catch? ›

If a catch block handles multiple exceptions, you can separate them using a pipe (|) and in this case, exception parameter (ex) is final, so you can't change it. The byte code generated by this feature is smaller and reduce code redundancy.

Is it possible to check for more than one error in a single exception statement? ›

Yes, it is possible to check multiple error types with a single try and except statement. For the except , we can include multiple error types listed within a tuple.

How do you catch multiple exceptions in a single catch? ›

Java allows you to catch multiple type exceptions in a single catch block. It was introduced in Java 7 and helps to optimize code. You can use vertical bar (|) to separate multiple exceptions in catch block. An old, prior to Java 7 approach to handle multiple exceptions.

What is the daily cap for Azure application Insights? ›

The maximum cap for an Application Insights classic resource is 1,000 GB/day unless you request a higher maximum for a high-traffic application. When you create a resource in the Azure portal, the daily cap is set to 100 GB/day.

What is the application exception error? ›

An Application Exception describes an error rooted in a technical issue, such as an application that is not responding. Such a situation is, for example, a project which extracts phone numbers from an employee database, creating queue items for each of them.

How do I reduce the cost of application insights? ›

Application Insights includes the following design considerations for cost optimization:
  1. Consider using sampling to reduce the amount of data that's sent: ...
  2. Consider turning off collection for unneeded modules: ...
  3. Consider limiting Asynchronous JavaScript and XML (AJAX) call tracing:
Mar 23, 2023

How do you catch exceptions and errors? ›

The try-catch is the simplest method of handling exceptions. Put the code you want to run in the try block, and any Java exceptions that the code throws are caught by one or more catch blocks. This method will catch any type of Java exceptions that get thrown. This is the simplest mechanism for handling exceptions.

How do you catch all exceptions? ›

Exception handling is used to handle the exceptions. We can use try catch block to protect the code. Catch block is used to catch all types of exception. The keyword “catch” is used to catch exceptions.

How to catch all exceptions in asp net? ›

ASP.NET Core Error Handling

An ExceptionFilterAttribute is used to collect unhandled exceptions. You can register it as a global filter, and it will function as a global exception handler. Another option is to use a custom middleware designed to do nothing but catch unhandled exceptions.

How do you diagnose and solve problems in Azure? ›

Open App Service diagnostics

In the left navigation, click on Diagnose and solve problems. For Azure Functions, navigate to your function app, and in the top navigation, click on Platform features, and select Diagnose and solve problems from the Resource management section.

How do I troubleshoot Azure problems? ›

Troubleshooting steps
  1. Step 1: Check whether NIC is misconfigured. ...
  2. Step 2: Check whether network traffic is blocked by NSG or UDR. ...
  3. Step 3: Check whether network traffic is blocked by VM firewall. ...
  4. Step 4: Check whether VM app or service is listening on the port. ...
  5. Step 5: Check whether the problem is caused by SNAT.
Feb 10, 2023


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