Most likely the number of file descriptors not enough. Check for number of file descriptors with ulimit -a ulimit -n Increase in /etc/security/limits.conf username hard nofile 3072 username soft nofile 2048 Another things to do, if above solution doesn’t help. As suggested at slashdot, increase number of max open connections in sysctl.conf, kernel headers and … Continue reading WebApp Error: : [Errno 24] Too many open files