restPort (5001) is already in use

[jasan-s]

Description

running firebase serve --only functions leads to the following error, although it does run on port 8010 as a backup. but still gives me the error:

E0920 03:52:05.094000000  3448 server_chttp2.c:53] {"created":"@1505904725.094000000","description":"No address added out of total 2 resolved","file":"..\src\core\ext\transport\chttp2\server\chttp2_server.c","file_line":260,"referenced_errors":[{"created":"@1505904725.094000000","description":"Failed to add port to server","file":"..\src\core\lib\iomgr\tcp_server_uv.c","file_line":385,"referenced_errors":[{"created":"@1505904725.094000000","description":"Failed to listen to port","file":"..\src\core\lib\iomgr\tcp_server_uv.c","file_line":277,"os_error":"address already in use"}]},{"created":"@1505904725.094000000","description":"Failed to add port to server","file":"..\src\core\lib\iomgr\tcp_server_uv.c","file_line":385,"referenced_errors":[{"created":"@1505904725.094000000","description":"Failed to listen to port","file":"..\src\core\lib\iomgr\tcp_server_uv.c","file_line":277,"os_error":"address already in use"}]}]}
error: restPort (5001) is already in use

Steps to reproduce

running firebase serve --only functions

Thanks!

[jmdobry]

Do you have something else running on port 5001?

You should be able to change the restPort used by the emulator in ~/.config/configstore/@google-cloud/functions-emulator/config.json, but I'm not sure if the Firebase tools force it to use 5001.

[ghost]

Also getting this, but don't believe that port is already in use.

[luis-pereira-data]

I have the same error. When checking the content of ~/.config/configstore/@google-cloud/functions-emulator/config.json:

{ "bindHost": "localhost", "grpcPort": 8009, "idlePruneInterval": 60000, "logFile": "logs/cloud-functions-emulator.log", "maxIdle": 300000, "region": "us-central1", "restPort": 8008, "service": "rest", "storage": "configstore", "supervisorPort": 8010, "tail": false, "timeout": 20000, "useMocks": false, "verbose": false, "watch": true, "watchIgnore": [ "node_modules" ], "projectId": "stratfa" }

Non of this ports are being found when running:

$ netstat -vanp tcp | grep 8008
$ netstat -vanp tcp | grep 8010
$ netstat -vanp tcp | grep 8009

[jmdobry]

Maybe it's trying to start the Emulator when the emulator is already running? Can you check to see if there are rogue Node.js emulator processes?

cc @laurenzlong

[laurenzlong]

When using the firebase CLI, the config file is overridden. The default port where the emulator gets run is 5001, and you can change this to another port by running:

firebase serve --only functions --port=9000