Spring Boot Application deployed on Elastic Beanstalk Java environment returns 502

Question

I'm trying to deploy a very simple Spring Boot application on AWS Elastic Beanstalk using AWS's Java configuration (not their Tomcat configuration), but I keep getting a 502 error with the following log:

2016/06/10 02:00:14 [error] 4921#0: *1 connect() failed 
(111: Connection refused) while connecting to upstream, client: 38.94.153.178,   
server: , request: "GET /test HTTP/1.1", upstream:   "http://127.0.0.1:5000/test",
host: "my-single-instance-java-app.us-east-1.elasticbeanstalk.com"

I've tried setting my port via Spring's application.properties to what the log seems to want (5000, using server.port=5000) and have verified that my application runs successfully on that port on localhost.

This question is very similar, except that I'm deploying a JAR instead of a WAR. It seems like there is something I'm missing regarding configuring Nginx, and I don't know how to proceed.

Here's my Spring Application:

@SpringBootApplication
public class MyApplication {

    public static void main(String[] args) {
        SpringApplication.run(MyApplication.class, args);
    }

    @RestController
    public static class MainController {

        @RequestMapping("/test")
        public String testMethod() {
            return "Method success!";
        }
    }
}

I'm not sure if this is what you're asking for but I have two roles: role: aws-elasticbeanstalk-ec2-role permissions: AWSElasticBeanstalkWebTier AWSElasticBeanstalkMulticontainerDocker AWSElasticBeanstalkWorkerTier role: aws-elasticbeanstalk-service-role permissions: AWSElasticBeanstalkEnhancedHealth AWSElasticBeanstalkService — Scott Storch, Jun 12 '16 at 05:50
No this are roles I wanted the Security Group for your EC2 instances . — Piyush Patil, Jun 12 '16 at 11:16
I'm still not quite sure if this is what you're asking for http://imgur.com/a/RwXgk — Scott Storch, Jun 13 '16 at 01:48
Ok Add a security rule in Inbound for TCP Port 5000 "0.0.0.0/32" — Piyush Patil, Jun 13 '16 at 02:01
That works! Can you explain what was going wrong that was fixed with this change? — Scott Storch, Jun 13 '16 at 20:48

Dmitry · Accepted Answer · 2016-10-21T15:38:23.790

21

Nginx doesn't know on which port your spring boot applicaiton is running. Make application run on port 5000 that Nginx redirects to by default by adding "server.port=5000" to application.properties or other suggested ways in the last step:

https://pragmaticintegrator.wordpress.com/2016/07/12/run-your-spring-boot-application-on-aws-using-elastic-beanstalk/

edited Oct 21 '16 at 15:38

answered Oct 20 '16 at 17:53

Dmitry

557
5
12

My spring boot app is running on default port I opened up security group still same issue (Bad Gateway) – sri hari kali charan Tummala Oct 01 '19 at 15:20

score 7 · Answer 2 · answered Jun 13 '16 at 20:51

7

From your question description and the security group settings you send me your only inbound Port 80 for your EC2 instance was open to world through firewall and you were using port 5000 for your application. So using the security rule that I gave you it opened the inbound port 5000 too for your EC2 instance so your application started working without above error.

answered Jun 13 '16 at 20:51

Piyush Patil

14,512
6
35
54

Isn't the traffic supposed to come into the server through port 80 and `nginx` forwards the traffic to the embedded application server on port 5000? It seems like you wouldn't want to expose port 5000. I wonder if this would work if you added a rule for port 5000 with "127.0.0.1/0". There is no mention of this on http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/security-group-rules-reference.html – Snekse Jun 10 '17 at 01:53

score 1 · Answer 3 · answered Mar 21 '20 at 21:48

If somebody is still getting such error, after setting server.port=5000. Here's what you can do if you got db connectivity:

In configuration section of your dashboard, go to RDS section and create a remote db. Remember username, password of formed db.
In Software section, add following properties:

SPRING_DATASOURCE_URL=jdbc:mysql://(your-db-url)/ebdb

SPRING_DATASOURCE_USERNAME=(username)

SPRING_DATASOURCE_PASSWORD=(password)

SPRING_JPA_HIBERNATE_DDL_AUTO=update

SPRING_JPA_DATABASE_PLATFORM=org.hibernate.dialect.MySQL5Dialect

score 1 · Answer 4 · answered May 19 '21 at 02:42

After reading both eb-engine.log as well nginx/error.log, the default nginx port is 5000 whereas the default port for spring-boot is 8080.

We can update our application via the elastic beanstalk CLI with the setenv cmd.

eb setenv SERVER_PORT=5000

We can update this in the code via application.properties

server.port=5000

score 0 · Answer 5 · answered Jul 21 '22 at 06:48

0

These steps worked for me,

Go-To > Environments > Select your environment,
Select "Configuration" at the left
Click on "Edit" against Software
Scroll Down to "Environment Properties"
add one more entry SERVER_PORT and set some number, I set 5000

answered Jul 21 '22 at 06:48

Karthik H

1,267
12
13

Spring Boot Application deployed on Elastic Beanstalk Java environment returns 502

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