Laravel queue with supervisord opening too many FIFO files

I'm running a Laravel queue job called "webhooks" using beanstalkd and supervisord on my Ubuntu server. I can see the job properly running with process ID 4403:

webhooks RUNNING pid 4403, uptime 4 days, 19:47:01

As you can see, this job has been running for 4 days. In my error logs, I started to notice the following error appearing:

error:02001018:system library:fopen:Too many open files

When I ran lsof | php to see what files were open, I noticed a ton of files open that had type FIFO. Here's an expert from the output:

COMMAND PID TID USER FD TYPE DEVICE SIZE/OFF NODE NAME php 4403 root 0r FIFO 0,8 0t0 9215811 pipe php 4403 root 1w FIFO 0,8 0t0 9215812 pipe php 4403 root 2w FIFO 0,8 0t0 9215812 pipe php 4403 root 3w FIFO 0,8 0t0 9215812 pipe php 4403 root 4w FIFO 0,8 0t0 9215812 pipe php 4403 root 8r FIFO 0,8 0t0 9215811 pipe php 4403 root 9r FIFO 0,8 0t0 9215811 pipe php 4403 root 10r FIFO 0,8 0t0 9215811 pipe php 4403 root 11r FIFO 0,8 0t0 9215811 pipe php 4403 root 12r FIFO 0,8 0t0 9215811 pipe php 4403 root 13r FIFO 0,8 0t0 9215811 pipe php 4403 root 14r FIFO 0,8 0t0 9215811 pipe php 4403 root 15r FIFO 0,8 0t0 9215811 pipe php 4403 root 16r FIFO 0,8 0t0 9215811 pipe php 4403 root 17r FIFO 0,8 0t0 9215811 pipe php 4403 root 18r FIFO 0,8 0t0 9215811 pipe php 4403 root 19r FIFO 0,8 0t0 9215811 pipe php 4403 root 20r FIFO 0,8 0t0 9215811 pipe php 4403 root 21r FIFO 0,8 0t0 9215811 pipe php 4403 root 22r FIFO 0,8 0t0 9215811 pipe php 4403 root 23r FIFO 0,8 0t0 9215811 pipe php 4403 root 24r FIFO 0,8 0t0 9215811 pipe php 4403 root 25r FIFO 0,8 0t0 9215811 pipe php 4403 root 26r FIFO 0,8 0t0 9215811 pipe php 4403 root 27r FIFO 0,8 0t0 9215811 pipe php 4403 root 28r FIFO 0,8 0t0 9215811 pipe php 4403 root 29r FIFO 0,8 0t0 9215811 pipe php 4403 root 30r FIFO 0,8 0t0 9215811 pipe php 4403 root 31r FIFO 0,8 0t0 9215811 pipe php 4403 root 32r FIFO 0,8 0t0 9215811 pipe php 4403 root 33r FIFO 0,8 0t0 9215811 pipe php 4403 root 34r FIFO 0,8 0t0 9215811 pipe php 4403 root 35r FIFO 0,8 0t0 9215811 pipe php 4403 root 36r FIFO 0,8 0t0 9215811 pipe

This is just an excerpt. There are actually around 1200 of these FIFO files open.

Does anyone know what is causing the files to be created? What types of code would cause the system to open a new FIFO file? What are these files used for?

Category:php Views:3 Time:2017-05-23

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