On 7.3.2011, at 11.51, Thierry de Montaudry wrote: > Since we upgraded to 2.0.9 (from 1.10 stock CentOS release), we are getting > some errors with pop3. When the machines get busy, now and then it start with > the following: >> Mar 7 11:19:51 xxx dovecot: pop3-login: Error: net_connect_unix(pop3) >> failed: Resource temporarily unavailable > And it generates hundreds of those before the machines dies, with the web > server getting stuck as well on imap sessions, even though there is no imap > error messages.
Do you see any warning messages in logs containing "client connections are being dropped"?