stack:Error: connect ETIMEDOUT 172.18.0.2:8080

 why am getting this error, T 172.18.0.2:8080

name:Error

stack:Error: connect ETIMEDOUT 172.18.0.2:8080\n    at Function.AxiosError.from (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/axios@1.12.0/node_modules/axios/lib/core/AxiosError.js:96:14)\n    at RedirectableRequest.handleRequestError (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/axios@1.12.0/node_modules/axios/lib/adapters/http.js:638:25)\n    at RedirectableRequest.emit (node:events:531:35)\n    at ClientRequest.eventHandlers.<computed> (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/follow-redirects@1.15.11/node_modules/follow-redirects/index.js:49:24)\n    at ClientRequest.emit (node:events:519:28)\n    at emitErrorEvent (node:_http_client:105:11)\n    at Socket.socketErrorListener (node:_http_client:518:5)\n    at Socket.emit (node:events:519:28)\n    at emitErrorNT (node:internal/streams/destroy:170:8)\n    at emitErrorCloseNT (node:internal/streams/destroy:129:3)\n    at Axios.request (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/axios@1.12.0/node_modules/axios/lib/core/Axios.js:45:41)\n    at processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at invokeAxios (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@file+packages+core_@opentelemetry+api@1.9.0_@opentelemetry+sdk-trace-base@1.30_08b575bec2313d5d8a4cc75358971443/node_modules/n8n-core/src/execution-engine/node-execution-context/utils/request-helper-functions.ts:313:10)\n    at proxyRequestToAxios (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@file+packages+core_@opentelemetry+api@1.9.0_@opentelemetry+sdk-trace-base@1.30_08b575bec2313d5d8a4cc75358971443/node_modules/n8n-core/src/execution-engine/node-execution-context/utils/request-helper-functions.ts:695:20)\n    at Object.request (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@file+packages+core_@opentelemetry+api@1.9.0_@opentelemetry+sdk-trace-base@1.30_08b575bec2313d5d8a4cc75358971443/node_modules/n8n-core/src/execution-engine/node-execution-context/utils/request-helper-functions.ts:1749:4)

code:ETIMEDOUT



ok so one container is at 172.17.0.2 and another at 172.18.0.2



Your setup has each container (n8n and email crawler) on a  different Docker network —this is why the service name (`email_crawler_service`) cannot be resolved by n8n, resulting in the `getaddrinfo ENOTFOUND` error.


Here’s how to fix this:


 *


 1. Both containers must be on the SAME Docker network 


- Containers with different IP ranges (172.17.x.x vs 172.18.x.x) means they are on different bridges.

- Docker’s internal DNS only works if both are on the same network.


 *


 How to Fix 


 Option A: Using Docker Compose 


1. Create a simple `docker-compose.yml` involving both services:

    ```yaml

    version: '3'

    services:

      n8n:

        image: n8n

        ports:

          - "5688:5678"

        networks:

          - mynetwork

      email_crawler_service:

        image: gurl-main-crawler-app

        ports:

          - "8080:8080"

        networks:

          - mynetwork

    networks:

      mynetwork:

        driver: bridge

    ```

2. Start with:

    ```bash

    docker-compose up -d

    ```

3. Now both will get IPs in the same subnet and  can resolve each other by name .


- In n8n HTTP node, use:

    ```

    http://email_crawler_service:8080/scan?url=...

    ```


 *


 Option B: Manually Connect Both to Same Network 


1. Create a user-defined network (if not using Compose):

    ```bash

    docker network create mynetwork

    ```

2. Connect both containers to this:

    ```bash

    docker network connect mynetwork <n8n-container>

    docker network connect mynetwork <email_crawler_service-container>

    ```

3. Now, test from n8n container:

    ```bash

    docker exec -it <n8n-container> ping email_crawler_service

    ```

- In n8n workflow, use `http://email_crawler_service:8080/scan?...`.


 


 Summary 


-  Different IP ranges = different Docker networks = no DNS resolution 

- Both containers must share a user-defined network for service names to resolve.


 Fix : Connect both to the same network, then your HTTP Request node will work with `http://email_crawler_service:8080`.


Ready to help with Compose file details or manual commands if you want!


[1](http://localhost:5688/workflow/gL5YHg6nJi5rVEvT/0aa466)




PS C:\Users\bum> docker ps



CONTAINER ID   IMAGE                   COMMAND                  CREATED        STATUS       PORTS                                         NAMES

665b6fb607a8   gurl-main-crawler-app   "./crawler"              22 hours ago   Up 8 hours   0.0.0.0:8080->8080/tcp, [::]:8080->8080/tcp   email_crawler_service

8420d112a2c1   redis:7-alpine          "docker-entrypoint.s…"   22 hours ago   Up 8 hours   0.0.0.0:6379->6379/tcp, [::]:6379->6379/tcp   email_crawler_redis

a3e3df5ef8f2   n8nio/n8n:latest        "tini -- /docker-ent…"   2 weeks ago    Up 7 hours   0.0.0.0:5688->5678/tcp, [::]:5688->5678/tcp   hopeful_mendeleev



docker network connect mynetwork hopeful_mendeleev

docker network connect mynetwork email_crawler_service



new IP comes with after restarting docker




172.19.0.2 and 172.19.0.3



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