firestore emulator on wsl2 does not work, results in ERR_CONNECTION_REFUSED

[REQUIRED] Environment info

firebase-tools:8.4.1

Platform: wsl2 with Ubuntu-18.04

[REQUIRED] Test case

Start emulator firebase emulators:start --only firestore Navigate to http://127.0.0.1:4000/firestore Try to write in the database or simply check console

[REQUIRED] Steps to reproduce

Brand new project firebase init Select emulators and firestore firebase init to get firestore files firestore.rules firestore.indexes.json Follow test case above - go to url and write to database

[REQUIRED] Expected behavior

Should be able to write and read collection through emulator UI

[REQUIRED] Actual behavior

No changes are made to firestore, and receive error in console

xhrio.js:622 POST http://localhost:8080/google.firestore.v1.Firestore/Write/channel?database=projects%2Fmyproj%2Fdatabases%2F(default)&VER=8&RID=78563&CVER=22&X-HTTP-Session-Id=gsessionid&%24httpHeaders=Authorization%3ABearer%20owner%0D%0AX-Goog-Api-Client%3Agl-js%2F%20fire%2F7.14.3%0D%0A&zx=u51ejgj9v8vq&t=1 net::ERR_CONNECTION_REFUSED

firebase emulators:start --only firestore --debug
[2020-06-05T19:52:33.335Z] > 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"]
[2020-06-05T19:52:33.336Z] > authorizing via signed-in user
i  emulators: Starting emulators: firestore {"metadata":{"emulator":{"name":"hub"},"message":"Starting emulators: firestore"}}
[2020-06-05T19:52:33.350Z] [hub] writing locator at /tmp/hub-leotestproj2.json
[2020-06-05T19:52:33.372Z] Ignoring unsupported arg: projectId {"metadata":{"emulator":{"name":"firestore"},"message":"Ignoring unsupported arg: projectId"}}
[2020-06-05T19:52:33.372Z] Ignoring unsupported arg: auto_download {"metadata":{"emulator":{"name":"firestore"},"message":"Ignoring unsupported arg: auto_download"}}
[2020-06-05T19:52:33.372Z] Starting Firestore Emulator with command {"binary":"java","args":["-Duser.language=en","-jar","/home/leo/.cache/firebase/emulators/cloud-firestore-emulator-v1.11.4.jar","--host","localhost","--port",8080,"--rules","/home/leo/projects/practice/firebase-proj/firestore.rules"],"optionalArgs":["port","webchannel_port","host","rules","functions_emulator","seed_from_export"],"joinArgs":false} {"metadata":{"emulator":{"name":"firestore"},"message":"Starting Firestore Emulator with command {\"binary\":\"java\",\"args\":[\"-Duser.language=en\",\"-jar\",\"/home/leo/.cache/firebase/emulators/cloud-firestore-emulator-v1.11.4.jar\",\"--host\",\"localhost\",\"--port\",8080,\"--rules\",\"/home/leo/projects/practice/firebase-proj/firestore.rules\"],\"optionalArgs\":[\"port\",\"webchannel_port\",\"host\",\"rules\",\"functions_emulator\",\"seed_from_export\"],\"joinArgs\":false}"}}
i  firestore: Firestore Emulator logging to firestore-debug.log {"metadata":{"emulator":{"name":"firestore"},"message":"Firestore Emulator logging to \u001b[1mfirestore-debug.log\u001b[22m"}}
[2020-06-05T19:52:33.966Z] API endpoint: http://localhost:8080 {"metadata":{"emulator":{"name":"firestore"},"message":"API endpoint: http://localhost:8080"}}
[2020-06-05T19:52:33.966Z] 
If you are using a library that supports the FIRESTORE_EMULATOR_HOST environment variable, run:

   export FIRESTORE_EMULATOR_HOST=localhost:8080

Dev App Server is now running.

 {"metadata":{"emulator":{"name":"firestore"},"message":"\nIf you are using a library that supports the FIRESTORE_EMULATOR_HOST environment variable, run:\n\n   export FIRESTORE_EMULATOR_HOST=localhost:8080\n\nDev App Server is now running.\n\n"}}
[2020-06-05T19:52:34.138Z] Ignoring unsupported arg: auto_download {"metadata":{"emulator":{"name":"ui"},"message":"Ignoring unsupported arg: auto_download"}}
[2020-06-05T19:52:34.138Z] Ignoring unsupported arg: port {"metadata":{"emulator":{"name":"ui"},"message":"Ignoring unsupported arg: port"}}
[2020-06-05T19:52:34.138Z] Starting Emulator UI with command {"binary":"node","args":["/home/leo/.cache/firebase/emulators/ui-v1.0.0/server.bundle.js"],"optionalArgs":[],"joinArgs":false} {"metadata":{"emulator":{"name":"ui"},"message":"Starting Emulator UI with command {\"binary\":\"node\",\"args\":[\"/home/leo/.cache/firebase/emulators/ui-v1.0.0/server.bundle.js\"],\"optionalArgs\":[],\"joinArgs\":false}"}}
i  ui: Emulator UI logging to ui-debug.log {"metadata":{"emulator":{"name":"ui"},"message":"Emulator UI logging to \u001b[1mui-debug.log\u001b[22m"}}
[2020-06-05T19:52:34.254Z] Web / API server started at http://localhost:4000
 {"metadata":{"emulator":{"name":"ui"},"message":"Web / API server started at http://localhost:4000\n"}}

┌───────────────────────────────────────────────────────────────────────┐
│ ✔  All emulators ready! View status and logs at http://localhost:4000 │
└───────────────────────────────────────────────────────────────────────┘

┌───────────┬────────────────┬─────────────────────────────────┐
│ Emulator  │ Host:Port      │ View in Emulator UI             │
├───────────┼────────────────┼─────────────────────────────────┤
│ Firestore │ localhost:8080 │ http://localhost:4000/firestore │
└───────────┴────────────────┴─────────────────────────────────┘
  Other reserved ports: 4400, 4500

Issues? Report them at https://github.com/firebase/firebase-tools/issues and attach the *-debug.log files.

Note: I tried this on mac and it worked fine

[yuchenshi]

I see two issues here:

1. Firestore emulator does not respond to 127.0.0.1 when asked to listen on localhost / 127.0.0.1 on WSL.
   • This may be an issue with WSL and much harder to troubleshoot.
2. Emulator UI tries to construct an invalid URL like http://0.0.0.0:8080 when Firestore emulator is configured to listen on 0.0.0.0.
   • This is something we can fix easily, and I’ve opened https://github.com/firebase/firebase-tools-ui/issues/286 to track it.

Hopefully fixing 2. can give you a reasonable workaround, and we’d appreciate any help on root-causing or working around 1.

[LeoTheG]

Thanks @yuchenshi , setting the host to 0.0.0.0 worked to be able to visit the emulator through my inet address. However I’m still unable to edit the firestore through the UI, this error appears now:

POST http://0.0.0.0:8080/google.firestore.v1.Firestore/Write/channel?database=projects%2Fmyproj%2Fdatabases%2F(default)&VER=8&RID=57465&CVER=22&X-HTTP-Session-Id=gsessionid&%24httpHeaders=Authorization%3ABearer%20owner%0D%0AX-Goog-Api-Client%3Agl-js%2F%20fire%2F7.14.3%0D%0A&zx=ymxr29oj2iv5&t=1 net::ERR_ADDRESS_INVALID