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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