panic when doveadm sieve put between multiple hosts

10 Jan 2017

      Dovecot version: 2.2.25 (7be1766)

I’m looking into an issue we’re having with a new setup. We have one fronted host with two backend hosts, and we’re attempting to use doveadm to allow us to administer sieve on the frontend and have it replicated to the backend hosts. 

When I attempt to use doveadm sieve put on the frontend host, i get the following on the frontend host:
frontend-machine $ cat /tmp/default.sieve | doveadm sieve put default
doveadm(root): Error: doveadm server disconnected before handshake: Connection reset by peer
doveadm(root): Error: 10.1.11.82:10993: Command sieve put failed for root: Connection reset by peer

when this happens, on the backend, I see this in /var/log/maillog:

Jan  9 17:00:35 was-imap1 dovecot: doveadm: Panic: epoll_ctl(add, 0) failed: Operation not permitted (fd doesn't support epoll - instead of ' /usr/lib64/dovecot/libdovecot.so.0(+0x8d60e) [0x7f7a86ba960e] -> /usr/lib64/dovecot/libdovecot.so.0(i_fatal+0) [0x7f7a86b481b6] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handle_add+0x147) [0x7f7a86bbe067] -> /usr/lib64/dovecot/libdovecot.so.0(+0xa0311) [0x7f7a86bbc311] -> /usr/lib64/dovecot/libdovecot.so.0(io_add+0xd) [0x7f7a86bbc3bd] -> dovecot/doveadm-server(doveadm_mail_get_input+0xde) [0x7f7a875c53de] -> dovecot/doveadm-server(doveadm_mail_single_user+0x73) [0x7f7a875c5633] -> dovecot/doveadm-server(+0x2874d) [0x7f7a875c574d] -> dovecot/doveadm-server(doveadm_cmd_ver2_to_mail_cmd_wrapper+0x27d) [0x7f7a875c65fd] -> dovecot/doveadm-server(doveadm_cmd_run_ver2+0x50c) [0x7f7a875d492c] -> dovecot/doveadm-server(+0x3b223) [0x7f7a875d8223] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_call_io+0x4c) [0x7f7a86bbce8c] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0xff) [0x7f7a86bbe2ef] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0x25) [0x7f7a86bbcf15] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7f7a86bbd0c8] -> /usr/lib64/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f7a86b4e613] -> dovecot/doveadm-server(main+0x186) [0x7f7a875b6276] -> /lib64/libc.so.6(__libc_start_main+0xf5) [0x7f7a8677bb15] -> dovecot/doveadm-server(+0x19321) [0x7f7a875b6321]
Jan  9 17:00:36 was-imap1 dovecot: doveadm: Fatal: master: service(doveadm): child 28542 killed with signal 6 (core dumped)

Now, if I log in to either of the backend hosts, I can run the sieve put command and it all works out fine, so it’s something in the communication between the frontend and backend. 

dovecot -n output for both a frontend and backend below

frontend-machine $ dovecot -n
# 2.2.25 (7be1766): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.4.15 (97b3da0)
# OS: Linux 3.10.0-327.18.2.el7.x86_64 x86_64 CentOS Linux release 7.2.1511 (Core)
auth_username_format = %Ln
director_mail_servers = 10.1.11.82 10.1.11.83
director_servers = 10.1.11.81
director_username_hash = %Ln
doveadm_port = 10993
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 index ihave duplicate mime foreverypart extracttext
mbox_write_locks = fcntl
namespace inbox {
  inbox = yes
  location =
  mailbox Drafts {
    special_use = \Drafts
  }
  mailbox Junk {
    special_use = \Junk
  }
  mailbox Sent {
    special_use = \Sent
  }
  mailbox "Sent Messages" {
    special_use = \Sent
  }
  mailbox Trash {
    special_use = \Trash
  }
  prefix =
}
passdb {
  args = proxy=y nopassword=y ssl=any-cert
  driver = static
}
plugin {
  sieve = file:~/sieve;active=~/.dovecot.sieve
}
protocols = imap pop3 lmtp sieve
service director {
  fifo_listener login/proxy-notify {
    mode = 0666
  }
  inet_listener {
    port = 1109
  }
  unix_listener director-userdb {
    mode = 0600
  }
  unix_listener login/director {
    mode = 0666
  }
}
service doveadm {
  inet_listener {
    port = 10993
  }
}
service imap-login {
  executable = imap-login director
}
service imap {
  process_limit = 250
}
service ipc {
  unix_listener ipc {
    user = dovecot
  }
}
service managesieve-login {
  executable = managesieve-login director
}
service pop3-login {
  executable = pop3-login director
}
ssl = required
ssl_ca = 

Tyler Jachetta

Aki Tuomi

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