Azure Function Blob Trigger using Python getting stuck while running at Host lock lease acquired by instance ID '000000000000000000000000055662B6' [closed]

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I am new to azure functions.I have written in python I am using blob Trigger but it gets stuck at Host lock lease acquired by instance ID '000000000000000000000000055662B6'. some forums say init.py is needed some say its not. here is what my folder structure looks like. Its boiler plate code

enter image description here

Provide your function code and local.settings.json in text format and @academy_courses2021. — Pravallika KV
– Pravallika KV, Commented Apr 14 at 3:59
This question is similar to: What is the reason for host lock lease acquired by instance id in Azure function?. If you believe it’s different, please edit the question, make it clear how it’s different and/or how the answers on that question are not helpful for your problem. — Basheer Jarrah
– Basheer Jarrah, Commented Apr 14 at 4:13

Pravallika KV · Accepted Answer · 2025-04-14 05:56:18Z

To run your code, make sure you have added valid Storage connection string to the environment variable AzureWebJobsStorage in local.settings.json.

{
  "IsEncrypted": false,
  "Values": {
    "AzureWebJobsStorage": "<Storage_Connection_String>",
    "FUNCTIONS_WORKER_RUNTIME": "python",
    "AzureWebJobsFeatureFlags": "EnableWorkerIndexing"
 }
}

Create a Container named upload144 and upload the .csv file the folder new.

enter image description here

Able to run the function and got the expected output:

function_app.py:

app = func.FunctionApp() 

@app.blob_trigger(arg_name="myblob", path="upload144/new/{name}.csv",
                               connection="AzureWebJobsStorage") 
def BlobTrigger(myblob: func.InputStream):
    logging.info(f"Python blob trigger function processed blob"
                f"Name: {myblob.name}"
                f"Blob Size: {myblob.length} bytes")

Output:

Found Python version 3.11.9 (py).

Azure Functions Core Tools
Core Tools Version:       4.0.6821 Commit hash: N/A +c09a2033faa7ecf51b3773308283af0ca9a99f83 (64-bit)
Function Runtime Version: 4.1036.1.23224

[2025-04-14T04:49:25.202Z] Worker process started and initialized.

Functions:

        BlobTrigger: blobTrigger

For detailed output, run func with --verbose flag.
[2025-04-14T04:49:31.570Z] Host lock lease acquired by instance ID '000000000000000000000000F72731CC'.
[2025-04-14T04:49:34.758Z] Executing 'Functions.BlobTrigger' (Reason='New blob detected(LogsAndContainerScan): upload144/new/Hello World.csv', Id=76719c6e-cd5c-4b75-8236-ef4b99b6a892)
[2025-04-14T04:49:34.763Z] Trigger Details: MessageId: 70acb2ed-b30e-4c5a-ab40-d171f73ba0dd, DequeueCount: 1, InsertedOn: 2025-04-14T04:49:31.000+00:00, BlobCreated: 2025-04-14T04:48:52.000+00:00, BlobLastModified: 2025-04-14T04:48:52.000+00:00
[2025-04-14T04:49:34.816Z] Python blob trigger function processed blobName: upload144/new/Hello World.csvBlob Size: None bytes
[2025-04-14T04:49:34.838Z] Executed 'Functions.BlobTrigger' (Succeeded, Id=76719c6e-cd5c-4b75-8236-ef4b99b6a892, Duration=1166ms)

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Azure Function Blob Trigger using Python getting stuck while running at Host lock lease acquired by instance ID '000000000000000000000000055662B6' [closed]

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