We set the ELB timeout to 60 seconds and the Apache2 timeout to 120 seconds. Ready to optimize your JavaScript with Rust? Concentration bounds for martingales with adaptive Gaussian steps. Is this an at-all realistic configuration for a DHC-2 Beaver? AWS Fargate + Application Load Balancer SSL Termination. Is it correct to say "The glue on the back of the sticker is dying down so I can not stick the sticker to the wall"? I need to setup 2 different target groups, 1 registered with port 443 and another 1 registered with port 80. Why does the distance from light to subject affect exposure (inverse square law) while from subject to lens does not? More observation: when I get correct response without redirecting, $remote_addr shows the IP of my vpn, and when I get 502, $remote_addr show another different IP. Does aliquot matter for final concentration? It is a Node JS application, so I did set the container to map port 3000, which the application uses. The rubber protection cover does not pass through the hole in the rim. This was so difficult to figure out - thanks for this Q/A. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. i2c_arm bus initialization and device-tree overlay. This article recorded how we fixed the HTTP 502 bad gateway errors with our web application. For a public load balancer, create a VCN with an internet gateway and a public regional subnet. This blog discusses the symptoms, the root cause (502 Bad Gateway), and the fix of this prevalent issue. Why was USB 1.0 incredibly slow even for its time? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Also in the logs of the requested service it doesn't show any api call is being hit. How could my characters be tricked into thinking they are on Mars? We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. Dual EU/US Citizen entered EU on US Passport. As some of articles on internet suggested there might be issue with new pods created under autoscaling might be showing as available to kube scheduler before they are actually ready and requests going to that new pod before it can run requests might be giving 502. Thanks for contributing an answer to Stack Overflow! Click here, Join our FREE Masterclass on Build, manage & Migrate EBS R12 to Cloud For Beginners. This blog discusses the symptoms, theroot cause (502 Bad Gateway),and the fix of this prevalent issue. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. It's free to sign up and bid on jobs. I suspect the problem to be related to the Apache configuration files, I might have to set it as the domain in the sites enabled. Making statements based on opinion; back them up with references or personal experience. Lets see what are the important factors here and what might be causing this issue with our application. Health checks use HTTP2. For my OCI environment all the settings are in place properly, LB health status shows Ok but still 502 appear on and off. Problem gone. Application Load Balancers PDF RSS A load balancer serves as the single point of contact for clients. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Would like to stay longer than 90 days. Connect and share knowledge within a single location that is structured and easy to search. Why do we use perturbative series if they don't converge? Requests sent by the Elastic Load Balancer are first handled by the Nginx server. Q&A for work. Add a new light switch in line with another switch? The ELB has a default connection KeepAlive of 60 seconds. We have setup ALB (Application Load Balancer) and mapped with ECS and got the ALB (CName) domain. Click here. Only one microservice is giving this 502 error which is under more load compared to the other microservices. Dual EU/US Citizen entered EU on US Passport. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Books that explain fundamental chess concepts. If he had met some scary fish, he would immediately return to the surface. Asking for help, clarification, or responding to other answers. How to solve 502 Bad Gateway errors with Elastic Load Balancer and EC2/Nginx for HTTPS requests? Can virent/viret mean "green" in an adjectival sense? 1)Public Load Balancer:To accept traffic from the internet, you create a public load balancer. Learn more about Teams Why does my stock Samsung Galaxy phone/tablet lack some features compared to other Samsung Galaxy models? Asking for help, clarification, or responding to other answers. You can associate the public IPaddress with a friendly DNS name through any DNS vendor. The app frontend runs on React and backend we are using 11-12 node js microservices. Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. On production I notice a few 502 Bad Gateway Errors when these services try to interact with each other. HTTP 502 Bad Gateway error Intermittently (not always), this application was throwing HTTP 502 bad gateway errors. I have no clue what is causing the problem! Is reverse proxy still required between AWS ALB and application server? Is it illegal to use resources in a University lab to prove a concept could work (to ultimately use to create a startup). It should work easily. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. There are several possible causes for HTTP 502: bad gateway errors, and the source can be either from your target or your Application Load Balancer. The load balancer sits in the middle, between the client and the actual service you want to talk to. No, theres no issues using apache on CentOS. Click here. I need to setup 2 different target groups, 1 registered with port 443 and another 1 registered with port 80. When would I give a checkpoint to my D&D party that they can return to if they die? Server Fault is a question and answer site for system and network administrators. We are seeing 502 errors in our load balancer log. Create an Amazon ECS service After your load balancer and target group are created, you can specify the target group in a service definition when you create a service. What are the Kalman filter capabilities for the state estimation in presence of the uncertainties in the system input? An Application Load Balancer functions at the application layer, the seventh layer of the Open Systems Interconnection (OSI) model. Also Check:Our blog post on Oracle EBS R12 On Cloud. Not the answer you're looking for? Would like to stay longer than 90 days. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. It is just a generic error, it doesnt actually tell you what exactly is the issue with your website. we are using nginx ingress controller. Click here, Once the Load Balancer is fully configured, While testing its functionality by navigating to its Public IP address on a web browser, some of the trainees are facing below error, Read More:About Oracle Database 18c. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. In lb logs, the api is logged, but the target response code shows "-" whereas lb response code shows 502 or 504. HTTP 502 Bad Gateway indicates a problem between a proxy service and its target. @KushVyas. 502 Bad Gateway Dedicated Load Balancer will only forward to ports 8091 (HTTP) or 8092 (HTTPS). Does balls to the wall mean full speed ahead or full speed ahead and nosedive? I have the security group allowing all traffic for the service from the ALB. 2. We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. @Naga We didn't, no. How can I use a VPN to access a Russian website that is banned in the EU? PSE Advent Calendar 2022 (Day 11): The other side of Christmas. That problem might be due to firewall issues or the application services are not available. Did neanderthals need vitamin C from the diet? Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Network Load Balancer to Fargate/ECS Cluster - how to map multiple ports/target groups to one service? getting 502 Bad Gateway on eks aws-alb-ingress #976; ELB returns 502s for requests sporadically after configuring through ALB ingress controller #989; Environment. How many transistors at minimum do you need to build a general-purpose computer? I am stuck with this. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, You can enable lb logs , if traffic passes through it in correct ways you will be able to see output or post logs here, In lb logs, the api is logged, but the target response code shows "-" whereas lb response code shows 502 or 504. This is a critical Production issue, any help would be greatly appreciated. Making statements based on opinion; back them up with references or personal experience. The ELB has a default connection KeepAlive of 60 seconds. Find centralized, trusted content and collaborate around the technologies you use most. We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. Hello Surbhi, To learn more, see our tips on writing great answers. The 502 (Bad Gateway) status code indicates that the server while acting as a gateway or proxy, received an invalid response from a backend server (E-Business SuiteApps Tier). +1 530 264 8480 To learn more, see our tips on writing great answers. Connect and share knowledge within a single location that is structured and easy to search. actually its also the same. AWS ALB resolves to 2 IPs. we have recently shifted production instance of our app from VM into Kubernetes environment and very randomly at some times it's giving 502 bad gateway error. Thanks for contributing an answer to Server Fault! To further distinguish between an application load balancer vs. API gateway, think of the gateway as an organizer and translator that connects various -- often unrelated -- pieces of software. You can use Amazon CloudWatch metrics and access logs to identify the source and cause of the error. We have taken an example of EBS Cloud Manager that was hosted on OCI. I have tried to check the kubernetes pod logs of that microservice but it doesn't give any helpful info as you can see. Does illicit payments qualify as transaction costs? Errors HTTP 400: Bad request HTTP 401: Unauthorized HTTP 403: Forbidden Check that the target application's HTTP listener is configured to receive requests on 8091 or 8092. In our setup, an AWS Application ELB has a target group of 4 EC2 instances. Ready to optimize your JavaScript with Rust? Should I exit and re-enter EU with my EU passport or is it ok? Thanks for contributing an answer to Stack Overflow! Click here, Load Balancer provides automated traffic distribution from one entry point to multiple servers in VCN or Load balancer automatically distributes traffic to list healthy backend servers based on. Why does the distance from light to subject affect exposure (inverse square law) while from subject to lens does not? Solution tried: We use an AWS Application Load Balancer (ALB) as a proxy to our API service, so I started there. AWS Load Balancer controller version: v2.2.0; Kubernetes version: 1.19; Using EKS (yes/no), if so version? There is an AWS elastic load balancer in the forefront. On each of the EC2 instances, there is an Apache2 which forwards to a Tomcat. This error may happen for the following main reasons: NSG, UDR, or Custom DNS is blocking access to backend pool members. What happens if you score more than 99 points in volleyball? The solution is: When you have cascading proxies/LBs, either align their KeepAlive timeouts, or - preferrably - even make them a little longer the further down the line you get. Is there any log generates to get the event and root cause of it ? Update the load balancer subnet security list so it allows the intended traffic. Not the answer you're looking for? I have the following setup: rev2022.12.11.43106. confusion between a half wave and a centre tapped full wave rectifier. How to make voltage plus/minus signs bolder? Connect and share knowledge within a single location that is structured and easy to search. 502 Bad Gateway. If the domain names don't match, the SSL/TLS handshake fails, and CloudFront returns an HTTP status code 502 (Bad Gateway) and sets the X-Cache header to Error from cloudfront. I am bit confused the way path resolves the endpoint, does it show in any logs the final endpoint it creates. Region, AD, Tenancy, Compartment, VCN, IAM, Compute, Storage Service, etc). This resolved my problem as soon as I increased the KeepAliveTimeout. If he had met some scary fish, he would immediately return to the surface. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. To create a minimal system with a functioning load balancer, you must: To know more onWhat Is Load Balancer In Oracle Cloud (OCI) & How To Create. Find centralized, trusted content and collaborate around the technologies you use most. If the 5 seconds are over, the Apache2 closes its connection and resets the connection with the ELB. On production I notice a few 502 Bad Gateway Errors when these services try to interact with each other. Error using SSH into Amazon EC2 Instance (AWS), AWS lambda api gateway error "Malformed Lambda proxy response", AWS ALB (Application Load Balancer) - "502 Bad Gateway" Issue, AWS API gateway to load balancer on private subnet ecs connection for microservices, 502 bad gateway errors when using ALB and aws-load-balancer-controller, AWS Application load balancer throwing 502. Can several CRTs be wired in parallel to one oscilloscope circuit? Post your doubts in the comment box below! Does it mean that lb is not able to handle the traffic or my application? Does balls to the wall mean full speed ahead or full speed ahead and nosedive? Does aliquot matter for final concentration? This application was showing the same 502 error when accessed on the browser using the public IP. TheLoad Balancingservice assigns it a private IP address that serves as the entry point for incoming traffic. Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content. Would like to stay longer than 90 days. Then the Nginx server forwards the request to the tomcat server. After you configure an application gateway, one of the errors that you may see is Server Error: 502 - Web server received an invalid response while acting as a gateway or proxy server. After that, Create a backend set with a health check policy. Because the Apache does not notice anything being wrong. How could my characters be tricked into thinking they are on Mars? Read More: About EBS Cloud Manager. I finally figured out what is wrong, the way I set up my application load balancer was not exactly right, I cant have only 1 target group (TG1) in which 1 target instance is registered on both port 80 and 443. Search for jobs related to 502 bad gateway nginx connection refused while connecting to upstream or hire on the world's largest freelancing marketplace with 22m+ jobs. Apache2 has a default connection KeepAlive of 5 seconds. Should I exit and re-enter EU with my EU passport or is it ok? I have increased the minimum count of pods to 10 for that microservice but still the same issue repeats. Ready to optimize your JavaScript with Rust? Would salt mines, lakes or flats be reasonably found in high, snowy elevations? Is it possible to hide or delete the new Toolbar in 13.1? Application Load Balancer + Nginx http to https redirect gives 502 Bad Gateway. When would I give a checkpoint to my D&D party that they can return to if they die? This will result in said 502 error code. 2)Private Load Balancer:To isolate your load balancer from the internet and simplify your security posture, you can create a private load balancer. To learn more, see our tips on writing great answers. Why does Cauchy's equation for refractive index contain only even power terms? Can several CRTs be wired in parallel to one oscilloscope circuit? Requests sent by the Elastic Load Balancer are first handled by the Nginx server. The load balancer generates an HTTP error The following HTTP errors are generated by the load balancer. What are they? An API gateway also manages network traffic, but in a different way. Why do quantum objects slow down when volume increases? Does balls to the wall mean full speed ahead or full speed ahead and nosedive? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Why is the eastern United States green if the wind moves from west to east? Should I exit and re-enter EU with my EU passport or is it ok? Cause This problem is often caused by application level issues, such as: requests taking a long time application using high memory/CPU Asking for help, clarification, or responding to other answers. or the backend server is able to listen to the dedicated port or not, and is there a firewall issue. The service assigns it a public IPaddress that serves as the entry point for incoming traffic. Easily add or remove network virtual appliances in the network path. I did already manage to get up a cluster and a service up and running connected to an ALB which has a DNS record created in Route53. Since we are able to access the IP and it is showing the error, we can conclude the load balancer is forwarding the request to the backend server. Ready to optimize your JavaScript with Rust? Oracle EBS (R12) On-Premise to OCI Migration (Lift & Shift):, Oracle EBS(R12) Cloud Manager Overview : What & How, [FIXED] Migration From On-Premise To Cloud Failed While, Zero Downtime Migration: Database & Applications (EBS R12), Oracle EBS(R12) On Cloud (OCI) for Apps DBAs & Architects, E-Business Suite (R12) On Oracle Cloud Training FAQs / Day 2, Oracle EBS Cloud Manager: New Release (20.2.1) is Now, Overview of Single Sign-On Integration Options, [Video 3 of 5] Oracle Cloud: Create VCN, Subnet, Firewall (Security List), IGW, DRG: Step By Step, [Video 4 of 5] What Is Load Balancer In Oracle Cloud (OCI) & How To Create: Step By Step, Build, manage & Migrate EBS R12 to Cloud For Beginners. When working with IIS Application Request Routing (ARR) deployments, one of the errors that you may see is "HTTP 502 - Bad Gateway". rev2022.12.11.43106. Also Check:Our blog post on Oracle Clone. I finally figured out what is wrong, the way I set up my application load balancer was not exactly right, I cant have only 1 target group (TG1) in which 1 target instance is registered on both port 80 and 443. Why is the eastern United States green if the wind moves from west to east? I did manage to setup the service and when I head to the IP of the task, it works fine. @JanDoerrenhaus Yes we have found the solution, We figured the issue in our system It was due to the immediate shutdown of ec2 instances, instead of waiting for draining period We already had elb set to 60 seconds and apache at 120seconds. Getting 502 Bad gateway errors intermittently in Azure kubernetes(AKS). Create at least two Compute instances, each in a separate. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Man, you saved my day :) ! Where does the idea of selling dragon parts come from? It's free to sign up and bid on jobs. Is it appropriate to ignore emails from a student asking obvious questions? Yes, you are right! To determine whether domain names in the certificate match the Origin Domain Name in the distribution or the Host header, you can use an online SSL checker or OpenSSL. I am using AWS ECS Fargate and have an application load balancer to forward all the connections to the correct instance. An application load balancer (ALB1) which has two listeners: Both rules are forwarding to a target group (TG1) in which 1 target instance is registered on both port 80 and 443, and both healthy. Was the ZX Spectrum used for number crunching? How to redirect all HTTP requests to HTTPS using .htaccess rules? The web server or associated backend application servers return a 502 error message of their own. @Jan thank you for the information! Connect and share knowledge within a single location that is structured and easy to search. Gateway Load Balancer has the following benefits: Integrate virtual appliances transparently into the network path. It has Apache installed in the Docker File. Each EC2 instance will have a Nginx web server and a Tomcat application server. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators . But, since we are not able to access the backend server there are few more things we need to check which are is the backend server up and running? Stay tuned for the more informative blogs! +91 84478 48535, Copyrights 2012-2022, K21Academy. How can I fix it? Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Cause : Malformed response from the instance or potentially an issue with the load balancer. Create a listener, with optional SSL handling. example service A calls service B, but in service B logs there is nothing to indicate that a call came from service A. Improve network virtual appliance availability. Asking for help, clarification, or responding to other answers. However when I try using the subdomain, which has a DNS record tied with the ALB (Application Load Balancer) I get 502 Bad Gateway. Read More:About Oracle Zero Downtime Migration. HTTP 502 (bad gateway) errors can occur for one of the following reasons: The web server or associated backend application servers running on EC2 instances return a message that can't be parsed by your Classic Load Balancer. Is there a higher analog of "category with all same side inverses is a groupoid"? FYI, there is nothing in my nginx error log. Not sure if it was just me or something she sent to the whole team. increase instance size, increase ELB healthcheck timeouts, scale up machines and check if it helps. Go to the Azure Support site and click on Get Support. How do I arrange multiple quotations (each with multiple lines) vertically (with a line through the center) so that they're side-by-side? Scale with ease while managing costs. even if times does not match, you should fix that problem and check if others issues persist after. Click on the image below to register forFREE. The load balancer sends the HTTP code to the client, saves the request to the access log, and increments the HTTPCode_ELB_4XX_Count or HTTPCode_ELB_5XX_Count metric. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. A 502 Bad Gateway Error is a general indicator that theres something wrong with a websites server communication. The 502.3 error means that - while acting as a proxy - ARR was unable to complete the request to the upstream server and send a response back to the client. Apache2 has a default connection KeepAlive of 5 seconds. Eliminating the usual suspects #. For a private load balancer, create a VCN with at least one private subnet. Connect and share knowledge within a single location that is structured and easy to search. The 502 (Bad Gateway) status code indicates that the server while acting as a gateway or proxy, received an invalid response from a backend server ( E-Business Suite Apps Tier). Symptom When you browse to the app, it returns a HTTP "502 Bad Gateway" error or a HTTP "503 Service Unavailable" error. The problem. This port misconfiguration can be caused by accidentally trying to override the properties http.port or https.port to 8091 or 8092. In our setup, an AWS Application ELB has a target group of 4 EC2 instances. Helo Gulam, It could be because some firewall is blocking it or an issue with the backend server. We tried making http/https connection agents in each service but still we get this issue. Mathematica cannot find square roots of some matrices? It only takes a minute to sign up. Also here is my both ingress files, we are using 2 ingress as backend needs rewrite annotation while frontend doesn't need that rewrite hence. I have microservices(in different programming languages) running on an EC2 instance. Making statements based on opinion; back them up with references or personal experience. What properties should my fictional HEAT rounds have to punch through heavy armor and ERA? Is there any problem using apache server on CentOS in the backend servers? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. rev2022.12.11.43106. Books that explain fundamental chess concepts, If he had met some scary fish, he would immediately return to the surface. After the load balancer receives a request, it evaluates the listener rules in priority order to determine which rule to apply, and then selects a target from the target group for the rule action. As shown in the above load balancer architecture, the main components are the load balancer, the backend set, and the connection between the load balancer and the backend set. Add backend servers (Compute instances) to the backend set. Making statements based on opinion; back them up with references or personal experience. Dual EU/US Citizen entered EU on US Passport. Any help would be appreciated. Something can be done or not a fit? I tried to check ingress logs, I can see the 502 errors but nothing helpful to debug there also. : Yes/v1.19.13-eks-8df270; Please see configuration details below: Service . Each EC2 instance will have a Nginx web server and a Tomcat application server. We are using Application ELB to load balance fargate tasks. Search for jobs related to Aws application load balancer 502 bad gateway or hire on the world's largest freelancing marketplace with 20m+ jobs. @Root We have exactly the same problem. please try to enable VCN flow logs from the LB to the backend server & see why is it happening. Clients send requests to the load balancer, and the load balancer sends them to targets, such as EC2 instances. Check Out:Our previous blog post on EBS Cloud Manager. In the logs, when we have a 502 error, we also noticed that the "response_processing_time" always shows "-1" and the "backend_status_code" always shows "-". Why would Henry want to close the breach? Required fields are marked *. Thanks for contributing an answer to Stack Overflow! Received a 'behavior reminder' from manager. Find centralized, trusted content and collaborate around the technologies you use most. We have created new listener rules to route requests to targets API is routing (Path base routing) http://umojify-alb-1987551880.us-east-1.elb.amazonaws.com Finally, we got the response "502 Bad Gateway" and "Status code: 405". Thanks in advance. We recently encountered an issue with our web application. IN: Choose Save to finish. Search for jobs related to Aws application load balancer 502 bad gateway or hire on the world's largest freelancing marketplace with 21m+ jobs. Below is the endpoint which I wanted to call:- https://hostname/a. Share This Post with Your Friends over Social Media! as you can see, I am also attaching full file of ingress logs here, if it is helpful to see what might be the issue here. we cover this in details in our OCI Cloud Associate course, register the FREE class here https://k21academy.com/1z0107202, Your email address will not be published. The 502 (Bad Gateway) status code indicates that the server, while acting as a gateway or proxy, received an invalid response from an inbound server it accessed while attempting to fulfill the request. The ELB access logs show the request with the 502 status code, and the Apache access logs show nothing. The CloudWatch metrics confirmed it was indeed the source of the responses. Your email address will not be published. I checked apache access log and error log, but I could not find anything we will try the same setting as you and see how. Do you still have it, or did you find a solution? Would salt mines, lakes or flats be reasonably found in high, snowy elevations? The routing behaviour of listneners and target groups is not very well described. rev2022.12.11.43106. Should teachers encourage good students to help weaker ones? Cross-platform Service Studio cross-platform-service-studio-11.53.24 Integration Studio integration-studio-11.14.16 Development Environment OutSystems 11 side effects and breaking changes Lifetime Management Console 10 Platform Server It's free to sign up and bid on jobs. We are having same issue currently, when this case happen, can we see any log on Apache side? Application runtime Troubleshooting HTTP 502 bad gateway Release Notes 11 Platform Server platform-server-11.18. Is it cheating if the proctor gives a student the answer key by mistake and the student doesn't report it? I got my EC2 instances running NGINX to healthy by adding http2 to the listen 80. When I head to the subdomain it redirects me to the service instance automatically and it is working fine. To configure your load balancer, you create target groups, and then register targets with your target groups. Why does my stock Samsung Galaxy phone/tablet lack some features compared to other Samsung Galaxy models? HTTP 502: Bad gateway Description : Indicates that the load balancer was unable to parse the response sent from a registered instance. Examples of frauds discovered because someone tried to mimic a random sequence. Today's software relies increasingly on APIs to integrate disparate components of an . example service A calls service B, but in service B logs there is nothing to indicate that a call came from service A. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); document.getElementById( "ak_js_2" ).setAttribute( "value", ( new Date() ).getTime() ); 8 Magnolia Pl, Harrow HA2 6DS, United Kingdom, Phone:US: and my nginx conf has the following setup: However, when I go to http://server_name/ping, I expect it to be redirected to https://server_name/ping, but I just got a 502 Bad Gateway, and I checked the log /var/log/nginx/http_redirect.log, it shows something like: another strange thing is if I refresh the page again, it gives the result without being redirected, and then refresh again, I will get 502 Bbad Gateway again, basically, I will get 502 Bad Gateway and result without redirect alternately. (Note:If you are just starting on Oracle Cloud or new toOracle Cloud Infrastructure (OCI), then I would suggest you check our previous post onOracle Cloud Infrastructure (OCI)which covers the basic concepts i.e. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Add a new light switch in line with another switch? Share Follow What are the Kalman filter capabilities for the state estimation in presence of the uncertainties in the system input? AWS Application Load Balancer 502 Bad Gateway. On each of the EC2 instances, there is an Apache2 which forwards to a Tomcat. How to send HTTP requests between AWS ECS services, AWS Network Load Balancer for Fargate tasks with end to end encryption, How to authorize only IP from a Fargate ECS service for MongoDB Atlas Cluster. Also in the logs of the requested service it doesn't show any api call is being hit. This Load Balancer will distribute the traffic to a set of EC2 instances (which can be auto-scaled). WhereHealth Check Policyis atest to confirm the availability of backend servers & aload balancing policytells the load balancer how to distribute incoming traffic to the backend servers. April 19, 2021 by Surbhi Sharma 4 Comments. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. What I try to do is very simple, I am using AWS application load balancer, and I want to redirect all my http requests to https: To subscribe to this RSS feed, copy and paste this URL into your RSS reader. When I access through servers ip the page is displayed, but when I use de load balacer ip, the error 502 is shown. When we host an application that is accessible on the cloud and it shows this error, that means the load balancer that is front-ending the application is accessible but there is a problem with the backend application. Before moving into the Issue & its Fix, Lets first understand what is the Error 502 Bad Gateway & Overview of Load Balancer. To learn more, see our tips on writing great answers. Can it be AWS load balancer issue? Chain applications across regions and subscriptions amazon web services - AWS Application Load Balancer 502 Bad Gateway - Server Fault AWS Application Load Balancer 502 Bad Gateway Ask Question Asked 3 years, 9 months ago Modified 3 years, 9 months ago Viewed 2k times 2 I am using AWS ECS Fargate and have an application load balancer to forward all the connections to the correct instance. 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