Django server not responding with Azure Application Insights connector

Describe your environment.

Running on WSL2 Ubuntu 20.04.

Django = "^4.0.5"
opencensus-ext-azure = "^1.1.4"

Steps to reproduce.

1. Create a new Django project and app

django-admin startproject '<project_name>'
django-admin startapp 'myapp'

1. Create an Application Insights resource on Azure and add the logging configuration to settings.py:

CONNECTION_STRING = 'InstrumentationKey=xxxx-xxx-xx-xx....'

LOGGING = {
    "version": 1,
    "disable_existing_loggers": False,
    "handlers": {
        "azure": {
            "level": "DEBUG",
            "class": "opencensus.ext.azure.log_exporter.AzureLogHandler",
            "connection_string": CONNECTION_STRING
        },
        "console": {
            "class": "logging.StreamHandler",
        },
    },
    "loggers": {
        "django": {
            "handlers": ["console", "azure"],
        },
    },
}

What is the expected behavior?

Server should respond to requests on 8000 and logs should be sent to Insights.

What is the actual behavior?

Server will not respond when started: python manage.py runserver. Logs are not sent.

June 20, 2022 - 13:39:47
Django version 4.0.5, using settings 'insights.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CONTROL-C.

# After the server is up
$ telnet 127.0.0.1 8000
Trying 127.0.0.1...
telnet: Unable to connect to remote host: Connection refused

Workaround 'disable_existing_loggers': True doesn’t work. The HTTP server responds, but Insights is not updated with metrics.

Additional context.

This issue was talk about in #904 but it was not resolved. I’m opening this issue to find what the cause really is.

[epomatti]

@dsv-mckinsey

You need to create a custom logger. Here is what worked for me:

LOGGING = {
    "version": 1,
    "disable_existing_loggers": False,
    "handlers": {
        "azure": {
            "level": "DEBUG",
            "class": "opencensus.ext.azure.log_exporter.AzureLogHandler",
        },
        "console": {
            "class": "logging.StreamHandler",
        },
    },
    "loggers": {
        "django": {
            "handlers": ["console"],
        },
        # Create a custom logger right here
        'azure': {
            'handlers': ['azure'],
            'level': 'INFO',
        },
    },
}

[lzchen]

@epomatti It is recommended usage to not use the root logger because the azure exporters themselves log messages when an exception occurs. All of the examples that send log data use custom loggers. This is already in the official docs