Since a few days, two of our php-applications (symfony2) are reporting the following errors in mysql-logs:
[Warning] Aborted connection 253 to db: '$appname' user: '$appname' host: 'localhost' (Got an error writing communication packets)
One or two pages won't render and return a blank 503-error, the rest of the website works fine.
The strange part is that this issue started on one server a few days ago, and this morning a second server is affected. Mysql is running local on each server and is configured to use unix-sockets
What could be the cause of this? No configuration changes to the code or web applications were done.
Things I tried:
- Increase max_allowed_packet from 1M to 16 and 64 -> no success
- Clean the mysql config and reset to default values -> no success
- Increase mysql buffers and caching -> no success