Hi All,

I got below errors when I do some 2000 users concurrency test against dovecot 2.1.7.

Dec 23 10:18:52 auth: Error: net_accept() failed: Too many open files

Dec 23 10:18:52 auth: Error: net_accept() failed: Too many open files

Dec 23 10:18:52 auth: Error: net_accept() failed: Too many open files

Dec 23 10:18:52 auth: Error: net_accept() failed: Too many open files

Dec 23 10:18:52 auth: Error: net_accept() failed: Too many open files

Dec 23 10:18:52 auth: Error: net_accept() failed: Too many open files

Dec 23 10:18:52 auth: Error: net_accept() failed: Too many open files

Dec 23 10:18:52 auth: Error: net_accept() failed: Too many open files

Dec 23 10:18:52 auth: Error: net_accept() failed: Too many open files

Dec 23 10:18:52 auth: Error: net_accept() failed: Too many open files

Dec 23 10:18:52 auth: Error: net_accept() failed: Too many open files

I seems the auth process become the bottleneck as there is only one auth process.

service auth-worker {

process_limit = 1000

}

service imap-login {

process_min_avail = 48

service_count = 0

}

service imap {

process_limit = 10240

process_min_avail = 8

}

I find that the auth process does not open too many files with lsof, and my limit is very big(1000000).

How to fix this? Thanks!