404s are always treated as errors in Symfony integration

[ostrolucky]

Even though application itself doesn't consider route not found issues as errors, newrelic-php-agent forcefully marks such transactions as errors

Description

See these errors

These are not really errors from application POV. See, Symfony catches it in HttpKernel::handle, then response is just replaced in that case and exception not further rethrown at HttpKernel::handleThrowable.

This is confirmed when we set newrelic.framework=no_framework in .ini configuration. With no_framework value, 404s are no longer treated as errors, despite other errors still being reported as normal, thanks to ekino newrelic bundle.

Steps to Reproduce

Set up symfony application with NR agent installed and call URL which reaches the application, but route doesn't exist.

Expected Behavior

Easiest solution would be to check if exception is instance of \Symfony\Component\HttpKernel\Exception\HttpExceptionInterface and in that case don't mark transaction as error.

Relevant Logs / Console output

Your Environment

php > var_dump(phpversion('newrelic'));
string(10) "9.19.0.309"
php > var_dump(PHP_VERSION);
string(5) "8.1.3"
php >

Additional context

In case you have super rights, you can probably view example error from screenshot here https://onenr.io/0oR80733PRG

[franek]

We had the same problem and in order to adress this problem, we added this configuration :

newrelic.error_collector.ignore_exceptions=Symfony\Component\HttpKernel\Exception\HttpExceptionInterface

Hope it could help.

[zsistla]

@franek Thanks so much for sharing that snippet!

[Ak-x]

Hello @ostrolucky, can you confirm that the workaround provided by @franek works for you?

[ostrolucky]

I didn't try it, we use

newrelic.framework=no_framework

like I specified in initial post, that works nicely and I believe is better solution, because why having something enabled that triggers the error only so you need to ignore said error? We didn't spot any other "benefit" from this integration. We use ekino newrelic bundle that replaces it much better.