Python Logger exception is logged as trace in Azure Application Insights (Azure Function)

Question

I try to log handled exception from my Python Azure Function in Application Insights as exception. Whatever i do it is always written as track with error severity level. Output in local console is "red" as excepted.

What i tried:

Changing function.json logging section to:

"ApplicationInsights": {
  "LogLevel": {
      "Default": "Error"
  }

various calls of exception method

    except Exception as e:
        logger.exception("An error has occured",exc_info=e)
        logger.exception("An error has occured")
        logger.exception()

tried to call telmetry client directly

    tc.track_exception()

clearing and adding handlers to logger

Edit:

Example to clarify what i mean: image

Didn't work. Exception is still logged as trace with error severity level in application insights. — anovac
– anovac, Commented Apr 7, 2020 at 10:01
Maybe I didn't understand what you want. You'd like to log the exception as plain string ? Because, then use you'll have to use logger.error('My exception: {}.format(e)) — Orsiris de Jong
– Orsiris de Jong, Commented Apr 7, 2020 at 10:25
I would like to log my exception as exception in application insights. Currently it is logged as a trace — anovac
– anovac, Commented Apr 7, 2020 at 10:33

anovac · Accepted Answer · 2020-04-10 12:25:03Z

2

Thanks to Orsiris de Jong after many hours of fight I found the solution:

handler = AzureLogHandler(connection_string = "instrmental key here")
handler.setLevel(logging.ERROR)
logger = logging.getLogger()
logger.propagate = False
if(handler not in logger.handlers):
    logger.addHandler(handler)
try:
    raise Exception("test")
except Exception as e:
    logger.exception('An error has occured', exc_info=True)

This handler changed trace into exception in Application Insights and resolved problem with double logging

edited Apr 10, 2020 at 12:25

answered Apr 7, 2020 at 10:44

anovac

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Orsiris de Jong · Accepted Answer · 2020-04-07 12:46:33Z

0

Logging the exception as plain text instead of logging a full trace goes like the following:

handler = AzureLogHandler(connection_string = "instrmental key here")
handler.setLevel(logging.ERROR)
logger = logging.getLogger()
logger.addHandler(handler)
try:
    raise Exception("test")
except Exception as e:
    # Logging as string
    logger.debug('The following error has occured: {0}'.format(e))
    # Logging as full trace
    # logger.debug('The following error was traced:', exc_info=True)

answered Apr 7, 2020 at 12:46

Orsiris de Jong

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1 Comment

anovac Over a year ago

Hi, thank you for answer! When I added AzureLogHandler it started to work but now my excepions are logged twice.

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