I've been experiencing a strange issue on Debian 9 with PHP 7.1.13. We have a number of PHP scripts setup to run via a crontab at various intervals between every 1 to 15 mins.
Most of the time these run fine and terminate successfully, however occasionally they don't terminate and end up hanging around in memory. There's currently 781 and I cleared them out about 48 hours ago.
The identical system running on Ubuntu 14.04 does not have this problem (running on php 5.6). I've also seen the issue on my development machine which runs Ubuntu 17.10 and php 7, although I thought it was linked to XDebug, which is runnnig on my dev machine.
Has anyone experienced similar issues with background PHP7 tasks? Its easy enough to work around it and write a watchdog script which kills them off after a set period, but I'd rather fix the issue rather than the symptom.