nginx file upload error

Question

2012/11/20 13:05:10 [crit] 16779#0: accept4() failed (24: Too many open files)
2012/11/20 13:05:10 [crit] 16779#0: accept4() failed (24: Too many open files)
2012/11/20 13:05:11 [crit] 16779#0: accept4() failed (24: Too many open files)
2012/11/20 13:05:11 [crit] 16779#0: accept4() failed (24: Too many open files)
2012/11/20 13:05:12 [crit] 16779#0: accept4() failed (24: Too many open files)
2012/11/20 13:05:12 [crit] 16779#0: accept4() failed (24: Too many open files)
2012/11/20 13:05:13 [crit] 16779#0: accept4() failed (24: Too many open files)
2012/11/20 13:05:13 [crit] 16779#0: accept4() failed (24: Too many open files)
2012/11/20 13:05:14 [crit] 16779#0: accept4() failed (24: Too many open files)
2012/11/20 13:05:14 [crit] 16779#0: accept4() failed (24: Too many open files)
2012/11/20 13:05:15 [crit] 16779#0: accept4() failed (24: Too many open files)

Answer 1

It seems that due to the system limit on the maximum number of files that a process can open, the accept4 system call cannot obtain new file descriptors. You can use ulimit -n to modify this limit.

ulimit command modifications will become invalid after restarting. For different Linux distributions, this initial value is placed in different configuration files. Please refer to Google for details.