Azure Load Balancer
An Azure service that delivers high availability and network performance to applications.
454 questions
Increase Application Gateway Load balancer gateway timeout
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Debarth
0
Reputation points
Application gateway load balancer request timeout was set to 20s.
Increased in to 300s but still request gets timed out in 60s.
Any solution would be much appreciated.
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SUNOJ KUMAR YELURU 14,466 Reputation points MVP2024-10-04T07:43:49.5366667+00:00 Hello @Debarth
Azure Application Gateway timeouts occur when requests exceed the configured timeout period. This can be due to slow backend servers, network issues, or misconfigurations within the gateway itself. Troubleshooting involves checking gateway settings, backend health, and network connectivity.
Step 1: Understand Timeout Settings
Azure Application Gateway has a default timeout setting for requests, which is typically 60 seconds. If you've increased the timeout to 300 seconds but still experience timeouts, it’s essential to verify that the correct settings are applied.
Step 2: Check Application Gateway Configuration
- Access the Azure Portal: Log in to your Azure account and navigate to the Application Gateway resource.
- Review Timeout Settings: Look for the "Settings" section, then check the "HTTP settings". Ensure that the "Timeout" value is indeed set to 300 seconds.
Step 3: Verify Backend Health
- Check Backend Pool: Ensure that the backend servers are healthy and responsive. Navigate to the "Backend health" section of the Application Gateway.
- Investigate Backend Response Times: If the backend servers are slow to respond, they may still cause timeouts even if the Application Gateway timeout is set higher.
Step 4: Review Application Gateway Logs
- Enable Diagnostics Logs: If not already enabled, turn on diagnostics logs for the Application Gateway.
- Analyze Logs: Look for any errors or patterns in the logs that might indicate why requests are timing out.
Step 5: Test with Different Scenarios
- Test Different Endpoints: If possible, test requests to different endpoints or services behind the Application Gateway to see if the issue is consistent.
- Use Tools: Utilize tools like Postman or curl to simulate requests and measure response times.
Final Answer
If the timeout persists despite increasing the setting to 300 seconds, ensure that the backend servers are healthy and responsive. Check the Application Gateway logs for any errors and consider testing different endpoints to isolate the issue. If necessary, consult Azure support for further assistance.
Step 1: Understand Timeout Settings
Azure Application Gateway has a default timeout setting for requests, which is typically 60 seconds. If you've increased the timeout to 300 seconds but still experience timeouts, it’s essential to verify that the correct settings are applied.
Step 2: Check Application Gateway Configuration
- Access the Azure Portal: Log in to your Azure account and navigate to the Application Gateway resource.
- Review Timeout Settings: Look for the "Settings" section, then check the "HTTP settings". Ensure that the "Timeout" value is indeed set to 300 seconds.
Step 3: Verify Backend Health
- Check Backend Pool: Ensure that the backend servers are healthy and responsive. Navigate to the "Backend health" section of the Application Gateway.
- Investigate Backend Response Times: If the backend servers are slow to respond, they may still cause timeouts even if the Application Gateway timeout is set higher.
Step 4: Review Application Gateway Logs
- Enable Diagnostics Logs: If not already enabled, turn on diagnostics logs for the Application Gateway.
- Analyze Logs: Look for any errors or patterns in the logs that might indicate why requests are timing out.
Step 5: Test with Different Scenarios
- Test Different Endpoints: If possible, test requests to different endpoints or services behind the Application Gateway to see if the issue is consistent.
- Use Tools: Utilize tools like Postman or curl to simulate requests and measure response times.
Final Answer
If the timeout persists despite increasing the setting to 300 seconds, ensure that the backend servers are healthy and responsive. Check the Application Gateway logs for any errors and consider testing different endpoints to isolate the issue. If necessary, consult Azure support for further assistance.
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SUNOJ KUMAR YELURU 14,466 Reputation points MVP
2024-10-06T07:22:40.03+00:00 @Debarth To follow-up, Please let us know if you have further query on this and don’t forget to
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KapilAnanth-MSFT 47,206 Reputation points Microsoft Employee2024-10-08T10:49:23.9433333+00:00 @Debarth ,
Welcome to the Microsoft Q&A Platform. Thank you for reaching out & I hope you are doing well.
I see Sunoj has added their insights.
I would suggest you check the Application Gateway Access Log.
- And use properties such as
- timeTaken
- serverResponseLatency
- clientResponseTime
- error_info
- To understand whether or not the application itself closed the connection rather than the App gateway
See : How to Enable logging through the Azure portal
Cheers,
Kapil
- And use properties such as
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