So a few people just reported that they couldn't make any calls. I logged into asterisk and at first everything on the console looked normal, then I got swamped with messages about too many open files.

This is from my asterisk/messages log file:
[Oct 2 16:46:00] WARNING[19429] rtp.c: Unable to allocate RTCP socket: Too many open files [Oct 2 16:46:00] WARNING[19429] udptl.c: Unable to allocate socket: Too many open files
[Oct  2 16:46:00] WARNING[19429] acl.c: Cannot create socket
[Oct 2 16:46:00] WARNING[19429] channel.c: Channel allocation failed: Can't create alert pipe! Try increasing max file descriptors with ulimit -n

Messages like that repeat a few dozen times, and then I get this one....

manager.c: Accept returned -1: Too many open files

...and that repeated tens of thousands of times. I killed asterisk and restarted it. Looks normal again.

What the heck just happened? A bug? Was I attacked? Maybe I'm honestly hitting some system limit and I should bump up max file descriptors like the message says? We do have a few hundred SIP peers and maybe we'll hit 20-30 simultaneous calls at peak times but I didn't think that was particularly high load.

This is Asterisk 1.4.44. I know the 1.4 branch is old, but it had been trouble free for years (until now), and I'd have to rewrite some config syntax to upgrade so I didn't see a need to do it.



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