Issue with aiohttp example

[farbodsalimi]

I'm not sure if I'm doing something wrong or your aiohttp example is wrong! Seems backoff decorator doesn't catch aiohttp exceptions automatically and you need to raise the error manually:

@backoff.on_exception(backoff.expo,
                      aiohttp.ClientError,
                      max_tries=4)
async def get_url(url):
    async with aiohttp.ClientSession() as session:
        async with session.get(url) as response:
            response.raise_for_status()
            return await response.text()

if I remove response.raise_for_status() from the code above, no retries will happend on aiohttp.ClientError.

[fabien-sarcel]

async with aiohttp.ClientSession(raise_for_status=True) as session:

By default aiohttp doesn't raise exception for non-200 status. You should change it passing raise_for_status=True. see post on stackoverflow.