Linking elasticsearch db and mongodb to spring boot application using docker-compose giving issues

Question

I have a spring boot application which uses elasticsearch db and mongodb. I want to dockerize this on a docker-container for which I have written a docker-compose yml file which is given below

version : "3"
services:
  eswmongodb:
   image: mongo:latest
   container_name: mongocont
   ports:
    - "27017:27017"

  elasticsearch:
   image: docker.elastic.co/elasticsearch/elasticsearch:7.9.3
   container_name: elasticsearch
   environment:
    - node.name=elasticsearch
    - discovery.type=single-node
    - cluster.name=docker-cluster
   ports:
    - "9200:9200"
    - "9300:9300"


 esw:
  image: esw
  container_name: eswrapper
  ports:
    - "8071:8071"
  links:
    - elasticsearch
    - eswmongodb

Only mongodb is getting connected with the spring boot application and I am able to access that but when I am hitting an api which uses a elasticsearch. I get an error as

Occurred with exception:[Connection refused]

java.net.ConnectException: Connection refused

I have supplied the necessary information in application.properties file.

spring.data.elasticsearch.cluster-node=elasticsearch:9200
spring.data.elasticsearch.cluster-name=docker-cluster
spring.data.mongodb.uri=mongodb://eswmongodb:27017/esw

Any thoughts why elasticsearch is not able to get connected. I have seen earlier answers provided in stack-overflow but the issue still persists.

All container are showing running.

Also tried spring.data.elasticsearch.cluster-nodes this property but this becomes disable so I went with spring.data.elasticsearch.cluster-node.

I have also added the actual exception present in logs when I hit an api endpoint which uses elastic search for further help if required.

2022-01-04 13:44:45,354 | ERROR | TxId=1641303885129000010435 | 
IndexOperationsImpl.createIndexWithCustomSettingAndMapping:62 | 
Exception Occurred with exception:[Connection refused]

java.net.ConnectException: Connection refused at 

org.elasticsearch.client.RestClient.
extractAndWrapCause(RestClient.java:849)

at  org.elasticsearch.client.RestClient.
performRequest(RestClient.java:259)

at org.elasticsearch.client.RestClient.
performRequest(RestClient.java:246)

Some logs of elasticsearch container when hitting docker-compose logs elasticsearch

Attaching to elasticsearch
elasticsearch    | {"type": "server", "timestamp": "2022-01- 
04T16:03:59,187Z", "level": "INFO", "component": "o.e.n.Node", 
"cluster.name": "docker-cluster", "node.name": "elasticsearch", 
"message": "version[7.9.3], pid[7], 
[default/docker/c4138e51121ef06a6404866cddc601906fe5c868/2020 
10-16T13:34:25.304557Z], OS[Linux/5.10.25-linuxkit/aarch64], 
JVM[Oracle Corporation/OpenJDK 64-Bit Server VM/15/15+36-1562]" }
elasticsearch    | {"type": "server", "timestamp": "2022-01- 
04T16:03:59,189Z", "level": "INFO", "component": "o.e.n.Node", 
"cluster.name": "docker-cluster", "node.name": "elasticsearch", 
"message": "JVM home [/usr/share/elasticsearch/jdk]" }

Can you paste the output of "docker-compose logs elasticsearch" to your question? If there was error in the log, you can paste just the error will do. — gohm'c
– gohm'c, Commented Jan 4, 2022 at 14:18
That smells like a dead elastic container right after start. — Zeitounator
– Zeitounator, Commented Jan 4, 2022 at 14:38
links: is an obsolete and unnecessary Compose option, and it might interfere with the networking setup. Does removing the links: block (or changing it to depends_on:) help? Is the application starting up before Elasticsearch is available? — David Maze
– David Maze, Commented Jan 4, 2022 at 14:43
yes application is running but only with mongodb, if I hit for an api which uses elastic search it says connection refused — Aditya
– Aditya, Commented Jan 4, 2022 at 15:47
@gohm'c, there are lot of logs. so added some part in the question. — Aditya
– Aditya, Commented Jan 4, 2022 at 16:51

Aditya · Accepted Answer · 2022-01-06 12:28:02Z

1

Solved it by providing spring.data.elasticsearch.cluster-nodes in application.yml instead of application.properties file. It may sound strange but don't know why it is disabled in properties file but works in yml file as provided below.

spring:
  data:
    elasticsearch:
      cluster-name: docker-cluster
      cluster-nodes: elasticsearch:9200

Anyway thanks for providing suggestions in comment section of the question

answered Jan 6, 2022 at 12:28

Aditya

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