Hi,

Recently started receiving the error $SUBJECT. Soon after a number of segfault errors are reported for pop3-login. Based on my configuration, I believe I am set up to receive core files; however, my ulimit -c is 0. I have tried setting ulimit -c ... in /etc/init.d/dovecot and I have tried modifying /etc/security/limits.conf. In all cases /proc/[pid]/limits continued to report that my ulimit -c value was 0. What is the best process for capturing a core file from a login process (pop3-login).

I have found some similar hits on the web for this; however, none appear to lead to resolution and in most cases the implementation includes imap, mysql, etc...

Here is my dovecot.conf, any insight into the cause of this problem is greatly appreciated. Dovecot package is that shipped with RHEL 5.2 (dovecot-1.0.7-2.el5).

protocols = pop3 pop3s listen = * shutdown_clients = yes

#log_path = /var/log/pop.log #info_log_path = /var/log/popinfo.log syslog_facility = local6

ssl_disable = no

ssl_cert_file = /etc/pki/dovecot/certs/pop.pem ssl_key_file = /etc/pki/dovecot/private/pop.pem

login_dir = /var/run/dovecot/login login_user = dovecot login_process_size = 64 login_process_per_connection = no login_processes_count = 3 login_max_connections = 512 login_max_processes_count = 512 max_mail_processes = 10000 login_greeting = Unauthorized access is prohibited.

mail_location = mbox:/var/indexes/%u:INBOX=/var/spool/mail/%u

mail_privileged_group = vmail

pop3_lock_session = yes ######added for perfomance 61208 MT (Just for testing) # test with and without the following pop3_no_flag_updates = yes mmap_disable = yes mbox_read_locks = fcntl mbox_write_locks = fcntl mbox_lock_timeout = 300 #mbox_dirty_syncs = yes mbox_very_dirty_syncs = yes mbox_lazy_writes = yes mbox_min_index_size = 540

protocol imap { }

protocol pop3 { pop3_uidl_format = %08Xv%08Xu }

protocol lda { postmaster_address = postmaster@example.com }

auth default {

auth_cache_size = 10240 auth_cache_ttl = 18000 auth_debug=no mechanisms = plain passdb ldap { args = /etc/dovecot-ldap.conf } userdb ldap { args = /etc/dovecot-ldap.conf } auth_verbose = no

       }

dict { }

plugin { }

### The following added to troubleshoot segfault issue 6.16.08 by rt mail_drop_priv_before_exec = yes