Server[pid=XXXX] is already being debugged

[felipewhitaker]

Environment data

OS and version: Windows 11
Python version (& distribution if applicable, e.g. Anaconda): Python 3.10.6 (conda-forge) [MSC v.1929 64 bit (AMD64)] on win32
Using VS Code or Visual Studio: VS Code, Azurite version 3.33

Behavior

Expected @blob_trigger to work, but received Server[pid=XXXX] is already being debugged error

Steps to reproduce:

1. Follow AzFunc Quickstart
2. Choose blob_trigger
3. Create container (sample-workitems)
4. Run
5. (error message)

The related files are both in gist for easy reading, and in repository for reproduction.

---

{
  "IsEncrypted": false,
  "Values": {
    "AzureWebJobsStorage": "UseDevelopmentStorage=true",
    "FUNCTIONS_WORKER_RUNTIME": "python",
    "4931ba_STORAGE": "UseDevelopmentStorage=true"
  }
}

# function_app.py
import azure.functions as func
import logging

app = func.FunctionApp()

@app.blob_trigger(arg_name="myblob", path="sample-workitems",
                               connection="4931ba_STORAGE") 
def blob_triggered(myblob: func.InputStream):
    logging.info(f"Python blob trigger function processed blob"
                f"Name: {myblob.name}"
                f"Blob Size: {myblob.length} bytes")

...
14 Client <-- Adapter:
{
    "seq": 5,
    "type": "response",
    "request_seq": 2,
    "success": false,
    "command": "attach",
    "message": "Server[pid=4768] is already being debugged."
}
...

---

Originally opened at microsoft/debugpy#1831

[felipewhitaker]

I was able to make it work! The problem was that I was waitting for blob to enter sample-workitems/temp, which does not work. My hypothesis is that temp/ can not be watched.

I have updated the repository as an example, so I invite developers to test the activities below and testing whether both are correctly triggered.

import azure.functions as func
import logging

app = func.FunctionApp()

@app.blob_trigger(arg_name="myblob", path="sample-workitems",
                               connection="4931ba_STORAGE") 
def blob_triggered(myblob: func.InputStream):
    # is triggered both for new blobs in `sample-workitems` and
    #   `sample-workitems/temp`
    logging.info(f"Python blob trigger function processed blob"
                f"Name: {myblob.name}"
                f"Blob Size: {myblob.length} bytes")

@app.blob_trigger(arg_name="myblob", path="sample-workitems/temp",
                               connection="4931ba_STORAGE") 
def temp_triggered(myblob: func.InputStream):
    # is not triggered when a blob enters `sample-workitems/temp`
    logging.info(f"Python blob trigger function processed blob"
                f"Name: {myblob.name}"
                f"Blob Size: {myblob.length} bytes")

[blueww]

Hi @felipewhitaker

Thanks for raising this issue!
However, I don't see what's the problem of Azurite in this issue.

If you need Azurite support, would you please Share the Azurite version, Azurite debug log, the expected Azurite behavior.

[felipewhitaker]

Hi @blueww ,

I thought this would be the best place to raise this issue, but I sincerely do not know whether this is a problem with Azurite or some other component related to developing Azure Functions.

The problem is that the trigger does not work when watching temp/ folder, as the example above:

@app.blob_trigger(arg_name="myblob", path="sample-workitems",
                               connection="4931ba_STORAGE") 
def blob_triggered(myblob: func.InputStream):
    # is triggered both for new blobs in `sample-workitems` and
    #   `sample-workitems/temp`
    ...

@app.blob_trigger(arg_name="myblob", path="sample-workitems/temp",
                               connection="4931ba_STORAGE") 
def temp_triggered(myblob: func.InputStream):
    # is not triggered when a blob enters `sample-workitems/temp`
    ...

---

Azurite version: VS Code extension 3.33.0
Expected behavior: be correctly triggered

0 Starting Session:
{
    "name": "Attach to Python Functions",
    "type": "debugpy",
    "request": "attach",
    "connect": {
        "host": "localhost",
        "port": 9091
    },
    "logToFile": true,
    "preLaunchTask": "func: host start",
    "__configurationTarget": 6,
    "clientOS": "windows",
    "debugOptions": [
        "RedirectOutput",
        "ShowReturnValue"
    ],
    "justMyCode": true,
    "showReturnValue": true,
    "workspaceFolder": "\\azurite"
}
4 Client <-- Adapter:
{
    "seq": 1,
    "type": "event",
    "event": "output",
    "body": {
        "category": "telemetry",
        "output": "ptvsd",
        "data": {
            "packageVersion": "1.8.12"
        }
    }
}
5 Client <-- Adapter:
{
    "seq": 2,
    "type": "event",
    "event": "output",
    "body": {
        "category": "telemetry",
        "output": "debugpy",
        "data": {
            "packageVersion": "1.8.12"
        }
    }
}
10 Client --> Adapter:
{
    "command": "initialize",
    "arguments": {
        "clientID": "vscode",
        "clientName": "Visual Studio Code",
        "adapterID": "debugpy",
        "pathFormat": "path",
        "linesStartAt1": true,
        "columnsStartAt1": true,
        "supportsVariableType": true,
        "supportsVariablePaging": true,
        "supportsRunInTerminalRequest": true,
        "locale": "en",
        "supportsProgressReporting": true,
        "supportsInvalidatedEvent": true,
        "supportsMemoryReferences": true,
        "supportsArgsCanBeInterpretedByShell": true,
        "supportsMemoryEvent": true,
        "supportsStartDebuggingRequest": true,
        "supportsANSIStyling": true
    },
    "type": "request",
    "seq": 1
}
13 Client <-- Adapter:
{
    "seq": 3,
    "type": "response",
    "request_seq": 1,
    "success": true,
    "command": "initialize",
    "body": {
        "supportsCompletionsRequest": true,
        "supportsConditionalBreakpoints": true,
        "supportsConfigurationDoneRequest": true,
        "supportsDebuggerProperties": true,
        "supportsDelayedStackTraceLoading": true,
        "supportsEvaluateForHovers": true,
        "supportsExceptionInfoRequest": true,
        "supportsExceptionOptions": true,
        "supportsFunctionBreakpoints": true,
        "supportsHitConditionalBreakpoints": true,
        "supportsLogPoints": true,
        "supportsModulesRequest": true,
        "supportsSetExpression": true,
        "supportsSetVariable": true,
        "supportsValueFormattingOptions": true,
        "supportsTerminateRequest": true,
        "supportsGotoTargetsRequest": true,
        "supportsClipboardContext": true,
        "exceptionBreakpointFilters": [
            {
                "filter": "raised",
                "label": "Raised Exceptions",
                "default": false,
                "description": "Break whenever any exception is raised."
            },
            {
                "filter": "uncaught",
                "label": "Uncaught Exceptions",
                "default": true,
                "description": "Break when the process is exiting due to unhandled exception."
            },
            {
                "filter": "userUnhandled",
                "label": "User Uncaught Exceptions",
                "default": false,
                "description": "Break when exception escapes into library code."
            }
        ],
        "supportsStepInTargetsRequest": true
    }
}
14 Client --> Adapter:
{
    "command": "attach",
    "arguments": {
        "name": "Attach to Python Functions",
        "type": "debugpy",
        "request": "attach",
        "connect": {
            "host": "localhost",
            "port": 9091
        },
        "logToFile": true,
        "preLaunchTask": "func: host start",
        "__configurationTarget": 6,
        "clientOS": "windows",
        "debugOptions": [
            "RedirectOutput",
            "ShowReturnValue"
        ],
        "justMyCode": true,
        "showReturnValue": true,
        "workspaceFolder": "\\azurite",
        "__sessionId": "fbe2ed6e-1849-4096-a62f-53ac2a80437e"
    },
    "type": "request",
    "seq": 2
}
15 Client <-- Adapter:
{
    "seq": 4,
    "type": "event",
    "event": "debugpyWaitingForServer",
    "body": {
        "host": "127.0.0.1",
        "port": 51863
    }
}
165 Client <-- Adapter:
{
    "seq": 5,
    "type": "response",
    "request_seq": 2,
    "success": false,
    "command": "attach",
    "message": "Server[pid=24812] is already being debugged."
}
166 Client --> Adapter:
{
    "command": "disconnect",
    "arguments": {
        "restart": false
    },
    "type": "request",
    "seq": 3
}
168 Client <-- Adapter:
{
    "seq": 6,
    "type": "event",
    "event": "terminated"
}
168 Client <-- Adapter:
{
    "seq": 7,
    "type": "response",
    "request_seq": 3,
    "success": true,
    "command": "disconnect"
}
171 Stopping Session
174 Error:
{}

[blueww]

Not sure what's the blob_trigger called rest API.
So would you like to first get what's the rest API and server responds difference caused the "trigger does not work when watching temp/ folder", then we can see is this an Azurite issue.
You might can contact the team who owns blob_trigger first.