Cannot get Firebase Emulators running - firebase

Question

Trying to run Firebase Emulators with the command firebase emulators:start I'm not able to start it. Checking the logs I see this.
firebase-debug.log
[debug] [2022-10-13T17:03:11.665Z] ----------------------------------------------------------------------
[debug] [2022-10-13T17:03:11.667Z] Command: /usr/local/bin/node /usr/local/share/npm-global/bin/firebase emulators:exec --project=demo-project --ui ng serve
[debug] [2022-10-13T17:03:11.667Z] CLI Version: 11.14.2
[debug] [2022-10-13T17:03:11.667Z] Platform: linux
[debug] [2022-10-13T17:03:11.667Z] Node Version: v16.17.1
[debug] [2022-10-13T17:03:11.673Z] Time: Thu Oct 13 2022 17:03:11 GMT+0000 (Coordinated Universal Time)
[debug] [2022-10-13T17:03:11.674Z] ----------------------------------------------------------------------
[debug]
[debug] [2022-10-13T17:03:11.760Z] > command requires scopes: ["email","openid","https://www.googleapis.com/auth/cloudplatformprojects.readonly","https://www.googleapis.com/auth/firebase","https://www.googleapis.com/auth/cloud-platform"]
[debug] [2022-10-13T17:03:12.144Z] openjdk version "11.0.16" 2022-07-19
[debug] [2022-10-13T17:03:12.145Z]
OpenJDK Runtime Environment (build 11.0.16+8-post-Debian-1deb11u1)
OpenJDK 64-Bit Server VM (build 11.0.16+8-post-Debian-1deb11u1, mixed mode, sharing)
[debug] [2022-10-13T17:03:12.149Z] Parsed Java major version: 11
[info] i emulators: Starting emulators: auth, functions, firestore, hosting {"metadata":{"emulator":{"name":"hub"},"message":"Starting emulators: auth, functions, firestore, hosting"}}
[info] i emulators: Detected demo project ID "demo-project", emulated services will use a demo configuration and attempts to access non-emulated services for this project will fail. {"metadata":{"emulator":{"name":"hub"},"message":"Detected demo project ID \"demo-project\", emulated services will use a demo configuration and attempts to access non-emulated services for this project will fail."}}
[info] i emulators: Shutting down emulators. {"metadata":{"emulator":{"name":"hub"},"message":"Shutting down emulators."}}
[debug] [2022-10-13T17:03:12.160Z] Error: listen EADDRNOTAVAIL: address not available ::1:4400
at Server.setupListenHandle [as _listen2] (node:net:1415:21)
at listenInCluster (node:net:1480:12)
at doListen (node:net:1629:7)
at processTicksAndRejections (node:internal/process/task_queues:84:21)
[error]
[error] Error: An unexpected error has occurred.
My project is in a docker container and if I run ifconfig this is what I'm getting
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.17.0.2 netmask 255.255.0.0 broadcast 172.17.255.255
ether 02:42:ac:11:00:02 txqueuelen 0 (Ethernet)
RX packets 251 bytes 123951 (121.0 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 238 bytes 36631 (35.7 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
loop txqueuelen 1000 (Local Loopback)
RX packets 7924 bytes 28381616 (27.0 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 7924 bytes 28381616 (27.0 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
I've tried to force the host within firebase.json like this (also with 0.0.0.0), without luck.
"emulators": {
"auth": {
"port": 9099,
"host": "127.0.0.1"
},
"functions": {
"port": 5001,
"host": "127.0.0.1"
},
"firestore": {
"port": 8080,
"host": "127.0.0.1"
},
"hosting": {
"port": 5000,
"host": "127.0.0.1"
},
"ui": {
"enabled": true,
"host": "127.0.0.1"
},
"singleProjectMode": true
}
Can you help me with this issue, please?

Answer 1

The project is in a docker container, for some weird reason, destroying the container and building it again, worked. However, I'm interested in knowing more about what could happen so if anyone has some clues I will be glad to read more.

Answer 2

Finally!!!
After checking this Github Issue it seems that the best way to deal with this problem is to set the ip and port inside firebase.json.
"auth": {
"port": 9099,
"host": "0.0.0.0"
},
"functions": {
"port": 5001,
"host": "0.0.0.0"
},
"firestore": {
"port": 8080,
"host": "0.0.0.0"
},
"hosting": {
"port": 5000,
"host": "0.0.0.0"
},
"hub": {
"host": "0.0.0.0",
"port": 4400
},
"logging": {
"host": "0.0.0.0",
"port": 4500
},
"eventarc": {
"host": "0.0.0.0",
"port": 9299
},
"ui": {
"enabled": true,
"port": 4000,
"host": "0.0.0.0"
},