Health-check-server-port is required with multiple runners. !?

[huhuhaha]

Thats my n8n-task-runners.json: {
“task-runners”: [
{
“runner-type”: “javascript”,
“env-overrides”: {
“NODE_FUNCTION_ALLOW_BUILTIN”: “",
“NODE_FUNCTION_ALLOW_EXTERNAL”: “lodash,axios”
}
},
{
“runner-type”: “python”,
“env-overrides”: {
“PYTHONPATH”: “/opt/runners/task-runner-python”,
“N8N_RUNNERS_STDLIB_ALLOW”: "”,
“N8N_RUNNERS_EXTERNAL_ALLOW”: “curl_cffi”
}
}
]
}

Describe the problem/error/question

No Python or Javascript Code Node works anymore! The documentation must be wrong: Task runner environment variables | n8n Docs

The ‘Multiple Runners’ Port Trap: As soon as I define both a javascript and a python runner in n8n-task-runners.json, the launcher becomes very strict. It throws an error: health-check-server-port is required with multiple runners.

What is the error message (if any)?

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Information on your n8n setup

• n8n version: latest
• Database (default: SQLite): SQLite
• n8n EXECUTIONS_PROCESS setting (default: own, main): external
• Running n8n via (Docker, npm, n8n cloud, desktop app): docker
• Operating system: linux

[Anshul_Namdev]

Hi @huhuhaha.

Consider reading this old reply of mine on your previous post:

@Anshul_Namdev

@huhuhaha As far as i know you can add "health-check-server-port" for each runner entry in your n8n-task-runners.json as launcher requires unique ports and 2 services cannot be on one port simultaneously , like you can try something like this:

{
  "task-runners": [
    {
      "runner-type": "javascript",
      "health-check-server-port": 5680,
      "env-overrides": {
        "NODE_FUNCTION_ALLOW_BUILTIN": "",
        "NODE_FUNCTION_ALLOW_EXTERNAL": "lodash,axios"
      }
    },
    {
      "runner-type": "python",
      "health-check-server-port": 5681,
      "env-overrides": {
        "PYTHONPATH": "/opt/runners/task-runner-python",
        "N8N_RUNNERS_STDLIB_ALLOW": "",
        "N8N_RUNNERS_EXTERNAL_ALLOW": "curl_cffi"
      }
    }
  ]
}

and i suppose curl_cffi is already installed on the machine , if not you can do that via:
uv pip install curl_cffi

and install this in your docker file as manually installing it on a running container would not last. Give this a try

[achamm]

Yeah the docs don’t mention this clearly but when you have multiple runners in that json file you need to give each one its own health-check-server-port. Your config is also missing a bunch of other fields that the default one has like workdir, command, args etc — I’d recommend looking at the default config file that ships with the docker image here: n8n/docker/images/runners/n8n-task-runners.json at master · n8n-io/n8n · GitHub and using that as your base, just adding your env-overrides on top of it. The javascript runner uses port 5681 and python uses 5682 by default.