edux

I had some massive problems when installing the 10.13.3 update on macOS. The update installed, my computer successfully restarted - but on a subsequent restart the boot failed and displayed the following installation log:

Apr  4 04:07:04 MacBook-Pro opendirectoryd[186]: [session] Processing a network change notification
Apr  4 04:07:06 MacBook-Pro Unknown[526]: Launching the Language Chooser for an OS Install
Apr  4 04:07:06 MacBook-Pro bspowerassertiontool[521]: Tool exited successfully (0).
Apr  4 04:07:06 MacBook-Pro launchprogresswindow[524]: ISAP: Show progress UI called
Apr  4 04:07:07 MacBook-Pro Installer Progress[180]: Progress UI App Starting
Apr  4 04:07:32 MacBook-Pro opendirectoryd[186]: [session] Received a network change notification
Apr  4 04:07:32 MacBook-Pro opendirectoryd[186]: [session] Received a network change notification

edux

On Tue Oct 27, 2015, history.state.gov began buckling under load, intermittently issuing 500 errors. Nginx's error log was sprinkled with the following errors:

2015/10/27 21:48:36 [crit] 2475#0: accept4() failed (24: Too many open files) 2015/10/27 21:48:36 [alert] 2475#0: *7163915 socket() failed (24: Too many open files) while connecting to upstream...

An article at http://www.cyberciti.biz/faq/linux-unix-nginx-too-many-open-files/ provided directions that mostly worked. Below are the steps we followed. The steps that diverged from the article's directions are marked with an *.

1. • Instead of using su to run ulimit on the nginx account, use ps aux | grep nginx to locate nginx's process IDs. Then query each process's file handle limits using cat /proc/pid/limits (where pid is the process id retrieved from ps). (Note: sudo may be necessary on your system for the cat command here, depending on your system.)
2. Added fs.file-max = 70000 to /etc/sysctl.conf
3. Added `nginx soft nofile 1