The application that we are going to discuss in this post was running on Elastic Beanstalk (EBS) service in Amazon Web Services (AWS). Intermittently this application was throwing an HTTP 502 Bad Gateway error. In this post, let’s discuss how we troubleshoot and resolve this HTTP 502 bad gateway error in the Elastic Beanstalk service.

AWS Elastic Beanstalk Architecture

This application was running on AWS Elastic Load Balancer, Nginx 1.18.0, Java 8, Tomcat 8, and Amazon Linux in AWS Elastic BeanStalk service (EBS). For the folks who are not that familiar with EBS, below is its high-level architecture. 

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