I've had this working for over a month now with no problems. Then I suffered a power outage today, and now dovecot/auth dies as soon as I start dovecot. I've spent the past three hours searching google, but can't find even a hint at what's wrong with my server. As far as I can tell, this is the only thing that has failed after bringing the server back up when power was restored. Can anyone help me figure out what is wrong?

The maillog records: May 9 20:27:37 box dovecot: auth: Debug: Loading modules from directory: /usr/lib64/dovecot/auth May 9 20:27:37 box dovecot: auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libauthdb_ldap.so May 9 20:27:37 box dovecot: auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libdriver_mysql.so May 9 20:27:37 box dovecot: auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libdriver_pgsql.so May 9 20:27:37 box dovecot: auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libdriver_sqlite.so May 9 20:27:37 box dovecot: auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libmech_gssapi.so May 9 20:27:37 box dovecot: auth: Panic: io_add(0x1) called twice fd=13, callback=0x3016833290 -> 0x3016836cd0 May 9 20:27:37 box dovecot: auth: Error: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0() [0x301683ca6a] -> /usr/lib64/dovecot/libdovecot.so.0() [0x301683ca b6] -> /usr/lib64/dovecot/libdovecot.so.0() [0x3016816dba] -> /usr/lib64/dovecot/libdovecot.so.0(ioloop_iolist_add+0x7f) [0x301684872f] -> /usr/lib64/dovecot/li bdovecot.so.0(io_loop_handle_add+0x39) [0x3016849149] -> /usr/lib64/dovecot/libdovecot.so.0(io_add+0xa3) [0x3016848593] -> /usr/lib64/dovecot/libdovecot.so.0(ma ster_service_io_listeners_add+0x68) [0x3016835b88] -> /usr/lib64/dovecot/libdovecot.so.0(master_service_init_finish+0x192) [0x30168363c2] -> dovecot/auth(main+0 x207) [0x415567] -> /lib64/libc.so.6(__libc_start_main+0xfd) [0x3016c1ecdd] -> dovecot/auth() [0x409aa9] May 9 20:27:37 box dovecot: master: Error: service(auth): child 25615 killed with signal 6 (core dumped) May 9 20:27:37 box dovecot: master: Error: service(auth): command startup failed, throttling

A core dump was produced. The backtrace shows: # gdb /usr/libexec/dovecot/auth coredump Core was generated by `dovecot/auth'. Program terminated with signal 6, Aborted. #0 0x0000003016c32885 in raise () from /lib64/libc.so.6 Missing separate debuginfos, use: debuginfo-install dovecot-2.0.9-2.el6_1.1.x86_64 (gdb) bt full #0 0x0000003016c32885 in raise () from /lib64/libc.so.6 #1 0x0000003016c34065 in abort () from /lib64/libc.so.6 #2 0x000000301683ca78 in ?? () from /usr/lib64/dovecot/libdovecot.so.0 #3 0x000000301683cab6 in ?? () from /usr/lib64/dovecot/libdovecot.so.0 #4 0x0000003016816dba in i_panic () from /usr/lib64/dovecot/libdovecot.so.0 #5 0x000000301684872f in ioloop_iolist_add () from /usr/lib64/dovecot/libdovecot.so.0 #6 0x0000003016849149 in io_loop_handle_add () from /usr/lib64/dovecot/libdovecot.so.0 #7 0x0000003016848593 in io_add () from /usr/lib64/dovecot/libdovecot.so.0 #8 0x0000003016835b88 in master_service_io_listeners_add () from /usr/lib64/dovecot/libdovecot.so.0 #9 0x00000030168363c2 in master_service_init_finish () from /usr/lib64/dovecot/libdovecot.so.0 #10 0x0000000000415567 in main ()

This is running on CentOS 6.2 # rpm -q dovecot dovecot-2.0.9-2.el6_1.1.x86_64

# dovecot --version 2.0.9

# dovecot -n # 2.0.9: /etc/dovecot/dovecot.conf # OS: Linux 2.6.32-220.13.1.el6.x86_64 x86_64 CentOS release 6.2 (Final) auth_debug = yes auth_mechanisms = plain login auth_verbose = yes listen = * mail_debug = yes mail_location = mbox:~/mail:INBOX=/var/mail/%u managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date mbox_write_locks = fcntl passdb { driver = pam } plugin { sieve = ~/.dovecot.sieve sieve_dir = ~/sieve } service auth { inet_listener { port = 12345 } unix_listener /var/spool/postfix/private/auth { mode = 0666 } user = $default_internal_user } ssl_cert =