Potential Issue with PHP-FPM 8.3.16: "WARNING: scoreboard: writer detected a potential crashed reader, decrementing reader count."

Description

Description:
After upgrading to PHP-FPM 8.3.16, we have encountered an issue that appears to occur only on certain services. Despite our efforts to adjust configurations and increase resources, the problem persists. We have not been able to identify any specific pattern or correlation during the PHP process that could be causing this issue. It seems to happen randomly. Although the number of errors is not large, they do appear consistently.

Error Message:

WARNING: scoreboard: writer detected a potential crashed reader, decrementing reader count.

Environment:

PHP Version: 8.3.16
Operating System (Docker image): php:8.3.16-fpm-alpine
Server Type:
Configuration:

pm = dynamic
pm.max_children = 50
pm.start_servers = 5
pm.min_spare_servers = 5
pm.max_spare_servers = 35

memory_limit=512M
max_execution_time=90
post_max_size=20M
upload_max_filesize=20M
max_file_uploads=20

Additional Information:
We have tried the following without success:

• Adjusting various configuration settings.
• Increasing system resources.

Any insights or suggestions on how to resolve this issue would be greatly appreciated. Thank you!

PHP Version

PHP-FPM 8.3.16

Operating System

php:8.3.16-fpm-alpine

Start with the PHP-FPM 8.3.16 warning in the php:8.3.16-fpm-alpine environment and compare the listed process-manager and PHP settings with a reproducible occurrence. Done means identifying a repeatable trigger and a confirmed resolution or regression; the issue names no source file or test to run.