We have problem in our PHP application that runs in GCP Cloud run.
Environment: PHP 8 (nginx php-fpm) in docker - official image "php:8.1-fpm".
There are certain files that are failed to be sent to the client when client opens a page in our system. I am not able to reproduce the same behavior locally in docker (exactly the same image), so I guess this is Cloud run specific.
The file is served by this PHP code:
...
header('Last-Modified: ' . $lmstring);
header('Content-Lenght: ' . filesize($filename));
readfile($filename);
die;
}
Getting this warning from cloud run:
"Truncated response body. Usually implies that the request timed out or the application exited before the response was finished."
Info log from Google HTTPS load balancer (error code explained here):
statusDetails: "client_disconnected_after_partial_response"
Real example and some facts I already found out: Opening page X in the internal system. This page downloads Y other files - most of these Y files (css+js) are sent successfully, but some are truncated to ~3641 characters. All files that are sent incompletely are usually truncated to the same length (rarely a bit less). It's always the same files trucated and I didn't spot anything they have in common. Sometimes it is js file, sometimes it is css file. The response code is HTTP 200.
I didn't find any error in PHP error output - trying to turn errors on on all levels. We get errors from PHP normally in other cases, so I don't expect anything is silenced.
Anybody has any idea why might this be happening and how to deal with that?
