TRACES_SAMPLE_RATE on 0.0 and still sending transactions to Sentry

[jeffreymoelands]

How do you use Sentry?

Sentry SaaS (sentry.io)

SDK version

5.0.0

Steps to reproduce

Config

when@prod:
    sentry:
        dsn: '%env(SENTRY_DSN)%'
        options:
            environment: '%env(SENTRY_ENVIRONMENT)%'
            # Specify a fixed sample rate (https://docs.sentry.io/platforms/php/guides/symfony/performance/)
            traces_sample_rate: '%env(float:SENTRY_TRACES_SAMPLE_RATE)%'
            ignore_exceptions:
                - Symfony\Component\HttpKernel\Exception\NotFoundHttpException
                - Symfony\Component\Security\Core\Exception\AccessDeniedException

        # If you are using Monolog, you also need this additional configuration to log the errors correctly:
        # https://docs.sentry.io/platforms/php/guides/symfony/#monolog-integration
        register_error_listener: false
        register_error_handler: false

    monolog:
        handlers:
            sentry:
                type: sentry
                level: !php/const Monolog\Logger::ERROR
                hub_id: Sentry\State\HubInterface
                channels: ['!event', '!doctrine', '!deprecation']

.env:

SENTRY_TRACES_SAMPLE_RATE=0.0

Expected result

Zero transactions in the overview

Actual result

[stayallive]

Do you have a front-end that is using tracing? Sample rate of 0 is not completely disabled, set it to null to achieve that otherwise the transaction sampling decision might be derived from the request like a front-end using tracing or another application that has tracing enabled.

See: https://docs.sentry.io/platforms/php/guides/symfony/tracing/trace-propagation/

[jeffreymoelands]

Hi, no we don't have a front-end using Sentry. Only the symfony application has an integration.

[cleptric]

Take a look at the headers in the transaction you are receiving. Any sentry-trace or trace-parent headers present?

[jeffreymoelands]

I don't see them but maybe I'm looking in the wrong place:

Or do you mean the parent-span?