desiguel opened a new issue #3290:
URL: https://github.com/apache/couchdb/issues/3290
## Description
If you setup two databases on localhost on different ports then replication
fails with the following error:
```
{"database":"_replicator","doc_id":"cb949cbbf5b38344a6917f099a001a75","id":"1bada9bcf6da8bb8578b6e07887f6829+continuous","node":"nonode@nohost","source":"http://admin:*****@localhost:5984/events/","target":"http://admin:*****@127.0.0.1:5985/events/","state":"crashing","info":{"error":"{replication_auth_error,\n
{session_request_failed,\"http://127.0.0.1:5985/_session\",\"admin\",\n
{conn_failed,{error,econnrefused}}}}"},"error_count":1,"last_updated":"2020-12-08T00:12:36Z","start_time":"2020-12-08T00:12:34Z","source_proxy":null,"target_proxy":null}
```
## Steps to Reproduce
1. Setup two running CouchDB instances on localhost using docker compose:
```
version: "3.8"
networks:
dev-couch:
driver: bridge
ipam:
config:
- subnet: 192.168.56.0/27
services:
# CouchDB A
couchdb-a:
image: apache/couchdb:latest
restart: always
environment:
COUCHDB_USER: admin
COUCHDB_PASSWORD: password
ports:
- 5984:5984
networks:
- dev-couch
# CouchDB B
couchdb-b:
image: apache/couchdb:latest
restart: always
environment:
COUCHDB_USER: admin
COUCHDB_PASSWORD: password
ports:
- 5985:5984
networks:
- dev-couch
```
2. Setup databases using curl:
```
curl -u admin:password -X PUT http://localhost:5984/_users
curl -u admin:password -X PUT http://localhost:5984/_replicator
curl -u admin:password -X PUT http://localhost:5984/events
curl -u admin:password -X PUT http://localhost:5985/_users
curl -u admin:password -X PUT http://localhost:5985/events
```
2. Setup replication using curl:
```
curl -X POST -u admin:password localhost:5984/_replicator -d
'{"target":"http://admin:password@localhost:5984/events";, "source":
"http://admin:password@localhost:5985/events";, "continuous": true}' -H
"content-Type: application/json"
```
## Expected Behaviour
Replication works.
## Your Environment
* CouchDB version used: Latest
* Browser name and version:N/A
* Operating system and version: Kubuntu 18.04
## Additional Context
It looks like Couch isn't respecting port when determining whether hosts are
different. My guess is that at least one login in the replication works, a
session is created, then when Couch sees the second host it treats it as the
same and tries to use the same session to access the second instance.
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