Azure / Azure/azure-functions-core-tools

The listener for function was unable to start

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Dominant language
C#
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Description

OS: Debian 11
package: azure-functions-core-tools-4 4.0.5312-1 amd64
Core Tools Version: 4.0.5312 Commit hash: N/A (64-bit)
Function Runtime Version: 4.23.2.21220

I am unable to start my timerTrigger function with `func start` which throws this error:

The listener for function 'Functions.myfunc' was unable to start. Azure.Core: Retry failed after 6 tries. Retry settings can be adjusted in ClientOptions.Retry. (Connection refused (127.0.0.1:10000)) (Connection refused (127.0.0.1:10000)) (Connection refused (127.0.0.1:10000)) (Connection refused (127.0.0.1:10000)) (Connection refused (127.0.0.1:10000)) (Connection refused (127.0.0.1:10000)). Azure.Core: Connection refused (127.0.0.1:10000). System.Net.Http: Connection refused (127.0.0.1:10000). System.Net.Sockets: Connection refused.

local.settings.json:
```
{
"IsEncrypted": false,
"Values": {
"FUNCTIONS_WORKER_RUNTIME": "custom",
"AzureWebJobsStorage": "UseDevelopmentStorage=true"
}
}
```

It seems it can't connect to the azurite emulator blob storage container. How can I fix this?

Contributor guide

Open the contributing guide

Research direction

Use local.settings.json and the `func start` entry point to reproduce the timerTrigger failure, then inspect how the tool handles the configured `UseDevelopmentStorage=true` endpoint at 127.0.0.1:10000. Done means the cause and a reliable fix or diagnostic for starting the function are established.

Written by the indexing model from the issue text.

Assessment

Tech stack
azure, csharp
Domain
backend, cli
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
35/100

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