Az CLI slow when a USB-C dock with card readers is plugged in

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#24,778 opened on Dec 1, 2022 1 comment 0 reactions 2 assignees Claimed by @jiasli View on GitHub

act-platform-engineering-squad Azure CLI Team Core customer-reported feature-request

Dominant language: Python
Stars: 4.6k
Forks: 3.5k
Avg merge: 3d 2h
Merged PRs (30d): 60

Description

## Describe the bug

I hope this is the right place to post this issue.

Azure cli is extremely slow on Windows 10 (more than 30 secs just to display `az --version`) when a USB-C dock with card readers is plugged in and displays them as drive letters (portable devices) and there are no devices plugged in.

![](https://imgur.com/nTbgLy8.png)

_Devices and Printers_
![](https://imgur.com/SsKPjJu.png)

_Device Manager_
![](https://imgur.com/5GLl9Ft.png)

```
❯ Measure-Command {az --version}

Days : 0
Hours : 0
Minutes : 0
Seconds : 38
Milliseconds : 502
Ticks : 385028983
TotalDays : 0.000445635396990741
TotalHours : 0.0106952495277778
TotalMinutes : 0.641714971666667
TotalSeconds : 38.5028983
TotalMilliseconds : 38502.8983
```

Note how something is trying to access the 'D:' drive:

_`cli.__main__: Command ran in 24.627 seconds`_
```
❯ az --version --debug --verbose
cli.knack.cli: Command arguments: ['--version', '--debug', '--verbose']
cli.knack.cli: __init__ debug log:
Enable color in terminal.
cli.knack.cli: Event: Cli.PreExecute []
urllib3.connectionpool: Starting new HTTPS connection (1): azure.microsoft.com:443
urllib3.connectionpool: https://azure.microsoft.com:443 "HEAD / HTTP/1.1" 301 0
cli.azure.cli.core.util: Connectivity check: 0.935667600002489 sec
urllib3.connectionpool: Starting new HTTPS connection (1): raw.githubusercontent.com:443
urllib3.connectionpool: https://raw.githubusercontent.com:443 "GET /Azure/azure-cli/main/src/azure-cli-core/setup.py HTTP/1.1" 200 1246
urllib3.connectionpool: Starting new HTTPS connection (1): raw.githubusercontent.com:443
urllib3.connectionpool: https://raw.githubusercontent.com:443 "GET /Azure/azure-cli/main/src/azure-cli-telemetry/setup.py HTTP/1.1" 200 679
azure-cli 2.42.0

core 2.42.0
telemetry 1.0.8

Extensions:
azure-devops 0.25.0

Dependencies:
msal 1.20.0
azure-mgmt-resource 21.1.0b1

Python location 'C:\Program Files (x86)\Microsoft SDKs\Azure\CLI2\python.exe'
Extensions directory 'C:\Users\******\.azure\cliextensions'

Python (Windows) 3.10.8 (tags/v3.10.8:aaaf517, Oct 11 2022, 16:37:59) [MSC v.1933 32 bit (Intel)]

Legal docs and information: aka.ms/AzureCliLegal

Your CLI is up-to-date.
cli.knack.cli: Event: Cli.PostExecute []
cli.__main__: Command ran in 24.627 seconds (init: 23.025, invoke: 1.603)
cli.azure.cli.core.decorators: Suppress exception:
Traceback (most recent call last):
File "D:\a\_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/__main__.py", line 61, in
File "D:\a\_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/__main__.py", line 54, in
SystemExit: 0

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "D:\a\_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/decorators.py", line 79, in _wrapped_func
File "D:\a\_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/telemetry.py", line 314, in set_custom_properties
File "D:\a\_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/telemetry.py", line 175, in
KeyError: 'x-ms-client-request-id'

telemetry.main: Begin splitting cli events and extra events, total events: 1
telemetry.client: Accumulated 0 events. Flush the clients.
telemetry.main: Finish splitting cli events and extra events, cli events: 1
telemetry.save: Save telemetry record of length 3038 in cache
telemetry.check: Returns Positive.
telemetry.main: Begin creating telemetry upload process.
telemetry.process: Creating upload process: "C:\Program Files (x86)\Microsoft SDKs\Azure\CLI2\python.exe C:\Program Files (x86)\Microsoft SDKs\Azure\CLI2\Lib\site-packages\azure\cli\telemetry\__init__.pyc C:\Users\******\.azure"
telemetry.process: Return from creating process
telemetry.main: Finish creating telemetry upload process.
```

If I remove the dock, disable the devices, or insert an SD card (on drive D:), everything goes back to normal.

```
❯ measure-Command {az version}

Days : 0
Hours : 0
Minutes : 0
Seconds : 0
Milliseconds : 814
Ticks : 8146486
TotalDays : 9.42880324074074E-06
TotalHours : 0.000226291277777778
TotalMinutes : 0.0135774766666667
TotalSeconds : 0.8146486
TotalMilliseconds : 814.6486
```

_`cli.__main__: Command ran in 1.672 seconds`_
```
❯ az --version --debug
cli.knack.cli: Command arguments: ['--version', '--debug']
cli.knack.cli: __init__ debug log:
Enable color in terminal.
cli.knack.cli: Event: Cli.PreExecute []
urllib3.connectionpool: Starting new HTTPS connection (1): azure.microsoft.com:443
urllib3.connectionpool: https://azure.microsoft.com:443 "HEAD / HTTP/1.1" 301 0
cli.azure.cli.core.util: Connectivity check: 0.7303947000036715 sec
urllib3.connectionpool: Starting new HTTPS connection (1): raw.githubusercontent.com:443
urllib3.connectionpool: https://raw.githubusercontent.com:443 "GET /Azure/azure-cli/main/src/azure-cli-core/setup.py HTTP/1.1" 200 1246
urllib3.connectionpool: Starting new HTTPS connection (1): raw.githubusercontent.com:443
urllib3.connectionpool: https://raw.githubusercontent.com:443 "GET /Azure/azure-cli/main/src/azure-cli-telemetry/setup.py HTTP/1.1" 200 679
azure-cli 2.42.0

core 2.42.0
telemetry 1.0.8

Extensions:
azure-devops 0.25.0

Dependencies:
msal 1.20.0
azure-mgmt-resource 21.1.0b1

Python location 'C:\Program Files (x86)\Microsoft SDKs\Azure\CLI2\python.exe'
Extensions directory 'C:\Users\*****\.azure\cliextensions'

Python (Windows) 3.10.8 (tags/v3.10.8:aaaf517, Oct 11 2022, 16:37:59) [MSC v.1933 32 bit (Intel)]

Legal docs and information: aka.ms/AzureCliLegal

Your CLI is up-to-date.
cli.knack.cli: Event: Cli.PostExecute []
cli.__main__: Command ran in 1.672 seconds (init: 0.484, invoke: 1.188)
cli.azure.cli.core.decorators: Suppress exception:
Traceback (most recent call last):
File "D:\a\_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/__main__.py", line 61, in
File "D:\a\_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/__main__.py", line 54, in
SystemExit: 0

During handling of the above exception, another exception occurred:

**Command Name**
Any `az cli` command

**Errors:**
```
cli.azure.cli.core.decorators: Suppress exception:
Traceback (most recent call last):
File "D:\a\_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/__main__.py", line 61, in
File "D:\a\_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/__main__.py", line 54, in
SystemExit: 0

During handling of the above exception, another exception occurred:

## To Reproduce:

I think someone would need a USB-C hub that assigns drive letters to empty card readers.

## Expected Behavior

I would expect not to have this behaviour, with or without the hub.

## Environment Summary
```
Windows-10-10.0.19042-SP0
Python 3.10.8
Installer: MSI

azure-cli 2.42.0

Extensions:
azure-devops 0.25.0

Dependencies:
msal 1.20.0
azure-mgmt-resource 21.1.0b1
```
## Additional Context

Contributor guide

Open the contributing guide

Assessment

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Az CLI slow when a USB-C dock with card readers is plugged in

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