ejabberd 16.03 crash

I am attempting to make a minimal ejabberd server. Well at least at first since I don't know about resources on a small VPS running FreeBSD 10.2. My intent is to have no browser based configuration. (One less thing attract hackers.) I will create user names and passwords with ejabberdctl. No link to other servers. This should all be obvious in my .yml file. (Nothing worse that a poorly configured server messing up a network.)

Anyway, here are all the pertinent details.

# pkg version | grep ejabberd
ejabberd-16.03                     =

yml file follows the break

# cat ejabberd.log
2016-04-19 01:04:37.606 [info] <0.7.0> Application lager started on node ejabberd@localhost
2016-04-19 01:04:37.616 [info] <0.7.0> Application crypto started on node ejabberd@localhost
2016-04-19 01:04:37.632 [info] <0.7.0> Application sasl started on node ejabberd@localhost
2016-04-19 01:04:37.647 [info] <0.7.0> Application asn1 started on node ejabberd@localhost
2016-04-19 01:04:37.648 [info] <0.7.0> Application public_key started on node ejabberd@localhost
2016-04-19 01:04:37.667 [info] <0.7.0> Application ssl started on node ejabberd@localhost
2016-04-19 01:04:37.676 [info] <0.7.0> Application fast_yaml started on node ejabberd@localhost
2016-04-19 01:04:37.695 [info] <0.7.0> Application fast_tls started on node ejabberd@localhost
2016-04-19 01:04:37.705 [info] <0.7.0> Application fast_xml started on node ejabberd@localhost
2016-04-19 01:04:37.712 [info] <0.7.0> Application stringprep started on node ejabberd@localhost
2016-04-19 01:04:37.727 [info] <0.7.0> Application cache_tab started on node ejabberd@localhost
2016-04-19 01:04:37.925 [info] <0.7.0> Application mnesia started on node ejabberd@localhost
2016-04-19 01:04:39.163 [info] <0.7.0> Application inets started on node ejabberd@localhost
2016-04-19 01:04:39.192 [error] <0.37.0> CRASH REPORT Process <0.37.0> with 0 neighbours exited with reason: no case clause matching <<>> in ejabberd_config:get_config_option_key/2 line 405 in application_master:init/4 line 134
2016-04-19 01:04:39.193 [info] <0.7.0> Application ejabberd exited with reason: no case clause matching <<>> in ejabberd_config:get_config_option_key/2 line 405
# cat crash.log
2016-04-19 01:04:39 =CRASH REPORT====
  crasher:
    initial call: application_master:init/4
    pid: <0.37.0>
    registered_name: []
    exception exit: {{bad_return,{{ejabberd_app,start,[normal,[]]},{'EXIT',{{case_clause,<<>>},[{ejabberd_config,get_config_option_key,2,[{file,"src/ejabberd_config.erl"},{line,405}]},{ejabberd_config,'-merge_configs/2-fun-0-',3,[{file,"src/ejabberd_config.erl"},{line,452}]},{lists,foldl,3,[{file,"lists.erl"},{line,1262}]},{ejabberd_config,'-merge_configs/2-fun-1-',2,[{file,"src/ejabberd_config.erl"},{line,444}]},{lists,foldl,3,[{file,"lists.erl"},{line,1262}]},{ejabberd_config,include_config_files,1,[{file,"src/ejabberd_config.erl"},{line,476}]},{ejabberd_config,read_file,2,[{file,"src/ejabberd_config.erl"},{line,150}]},{ejabberd_config,start,0,[{file,"src/ejabberd_config.erl"},{line,60}]}]}}}},[{application_master,init,4,[{file,"application_master.erl"},{line,134}]},{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,240}]}]}
    ancestors: [<0.36.0>]
    messages: []
    links: [<0.36.0>,<0.38.0>,<0.7.0>]
    dictionary: []
    trap_exit: true
    status: running
    heap_size: 1598
    stack_size: 27
    reductions: 183
  neighbours:
#
# cat ejabberd.sani
###
###'              ejabberd configuration file
###
###

### The parameters used in this configuration file are explained in more detail
### in the ejabberd Installation and Operation Guide.
### Please consult the Guide in case of doubts, it is included with
### your copy of ejabberd, and is also available online at
### http://www.process-one.net/en/ejabberd/docs/

### The configuration file is written in YAML.
### Refer to http://en.wikipedia.org/wiki/YAML for the brief description.
### However, ejabberd treats different literals as different types:
###
### - unquoted or single-quoted strings. They are called "atoms".
###   Example: dog, 'Jupiter', '3.14159', YELLOW
###
### - numeric literals. Example: 3, -45.0, .0
###
### - quoted or folded strings.
###   Examples of quoted string: "Lizzard", "orange".
###   Example of folded string:
###   > Art thou not Romeo,
###     and a Montague?

###.  =======
###'  LOGGING

##
## loglevel: Verbosity of log files generated by ejabberd.
## 0: No ejabberd log at all (not recommended)
## 1: Critical
## 2: Error
## 3: Warning
## 4: Info
## 5: Debug
##
loglevel: 5

##
## rotation: Describe how to rotate logs. Either size and/or date can trigger
## log rotation. Setting count to N keeps N rotated logs. Setting count to 0
## does not disable rotation, it instead rotates the file and keeps no previous
## versions around. Setting size to X rotate log when it reaches X bytes.
## To disable rotation set the size to 0 and the date to ""
## Date syntax is taken from the syntax newsyslog uses in newsyslog.conf.
## Some examples:
##  $D0     rotate every night at midnight
##  $D23    rotate every day at 23:00 hr
##  $W0D23  rotate every week on Sunday at 23:00 hr
##  $W5D16  rotate every week on Friday at 16:00 hr
##  $M1D0   rotate on the first day of every month at midnight
##  $M5D6   rotate on every 5th day of the month at 6:00 hr
##
log_rotate_size: 0
log_rotate_date: "$D0"
log_rotate_count: 1

##
## overload protection: If you want to limit the number of messages per second
## allowed from error_logger, which is a good idea if you want to avoid a flood
## of messages when system is overloaded, you can set a limit.
## 100 is ejabberd's default.
log_rate_limit: 100

##
## watchdog_admins: Only useful for developers: if an ejabberd process
## consumes a lot of memory, send live notifications to these XMPP
## accounts.
##
## watchdog_admins:
##   - "bob@example.com"

###.  ===============
###'  NODE PARAMETERS

##
## net_ticktime: Specifies net_kernel tick time in seconds. This options must have
## identical value on all nodes, and in most cases shouldn't be changed at all from
## default value.
##
## net_ticktime: 60

###.  ================
###'  SERVED HOSTNAMES

##
## hosts: Domains served by ejabberd.
## You can define one or several, for example:
## hosts:
##   - "example.net"
##   - "example.com"
##   - "example.org"
##
hosts: ["ME"]

##
## route_subdomains: Delegate subdomains to other XMPP servers.
## For example, if this ejabberd serves example.org and you want
## to allow communication with an XMPP server called im.example.org.
##
## route_subdomains: s2s

###.  ===============
###'  LISTENING PORTS

##
## listen: The ports ejabberd will listen on, which service each is handled
## by and what options to start it with.
##
listen:
  -
    port: 5222
    module: ejabberd_c2s
    ##
    ## If TLS is compiled in and you installed a SSL
    ## certificate, specify the full path to the
    ## file and uncomment these lines:
    ##
    certfile: "MY.crt"
    starttls: true
    ##
    ## To enforce TLS encryption for client connections,
    ## use this instead of the "starttls" option:
    ##
    ## starttls_required: true
    ##
    ## Custom OpenSSL options
    ##
    ##protocol_options:
  - max_stanza_size: 65536
  - shaper: c2s_shaper
  - access: c2s
  -
  ##   port: 5269
  ##  module: ejabberd_s2s_in
  ##
  ## ejabberd_service: Interact with external components (transports, ...)
  ##
  ## -
  ##   port: 8888
  ##   module: ejabberd_service
  ##   access: all
  ##   shaper_rule: fast
  ##   ip: "127.0.0.1"
  ##   hosts:
  ##     "icq.example.org":
  ##       password: "secret"
  ##     "sms.example.org":
  ##       password: "secret"

  ##
  ## ejabberd_stun: Handles STUN Binding requests
  ##
  ## -
  ##   port: 3478
  ##   transport: udp
  ##   module: ejabberd_stun

  ##
  ## To handle XML-RPC requests that provide admin credentials:
  ##
  ## -
  ##   port: 4560
  ##   module: ejabberd_xmlrpc
  ##   access_commands: {}
  -
  ##  port: 5280
  ##  module: ejabberd_http
  ##  request_handlers:
  ##    "/websocket": ejabberd_http_ws
  ##  "/pub/archive": mod_http_fileserver
  ##  web_admin: false
  ##  http_bind: true
  ## register: false
  ##  captcha: true

###.  ==================
###'  S2S GLOBAL OPTIONS

##
## s2s_use_starttls: Enable STARTTLS + Dialback for S2S connections.
## Allowed values are: false optional required required_trusted
## You must specify a certificate file.
##
## s2s_use_starttls: optional

##
## s2s_certfile: Specify a certificate file.
##
## s2s_certfile: "/path/to/ssl.pem"

## Custom OpenSSL options
##
## s2s_protocol_options:
##   - "no_sslv3"
##   - "no_tlsv1"

##
## domain_certfile: Specify a different certificate for each served hostname.
##
## host_config:
##   "example.org":
##     domain_certfile: "/path/to/example_org.pem"
##   "example.com":
##     domain_certfile: "/path/to/example_com.pem"

##
## S2S whitelist or blacklist
##
## Default s2s policy for undefined hosts.
##
## s2s_access: s2s

##
## Outgoing S2S options
##
## Preferred address families (which to try first) and connect timeout
## in milliseconds.
##
## outgoing_s2s_families:
##   - ipv4
##   - ipv6
## outgoing_s2s_timeout: 10000

###.  ==============
###'  AUTHENTICATION

##
## auth_method: Method used to authenticate the users.
## The default method is the internal.
## If you want to use a different method,
## comment this line and enable the correct ones.
##
auth_method: internal

##
## Store the plain passwords or hashed for SCRAM:
## auth_password_format: plain
auth_password_format: scram
##
## Define the FQDN if ejabberd doesn't detect it:
fqdn: "MYFQDN"

##
## Authentication using external script
## Make sure the script is executable by ejabberd.
##
## auth_method: external
## extauth_program: "/path/to/authentication/script"

##
## Authentication using ODBC
## Remember to setup a database in the next section.
##
## auth_method: odbc

##
## Authentication using PAM
##
## auth_method: pam
## pam_service: "pamservicename"

##
## Authentication using LDAP
##
## auth_method: ldap
##
## List of LDAP servers:
## ldap_servers:
##   - "localhost"
##
## Encryption of connection to LDAP servers:
## ldap_encrypt: none
## ldap_encrypt: tls
##
## Port to connect to on LDAP servers:
## ldap_port: 389
## ldap_port: 636
##
## LDAP manager:
## ldap_rootdn: "dc=example,dc=com"
##
## Password of LDAP manager:
## ldap_password: "******"
##
## Search base of LDAP directory:
## ldap_base: "dc=example,dc=com"
##
## LDAP attribute that holds user ID:
## ldap_uids:
##   - "mail": "%u@mail.example.org"
##
## LDAP filter:
## ldap_filter: "(objectClass=shadowAccount)"

##
## Anonymous login support:
##   auth_method: anonymous
##   anonymous_protocol: sasl_anon | login_anon | both
##   allow_multiple_connections: true | false
##
## host_config:
##   "public.example.org":
##     auth_method: anonymous
##     allow_multiple_connections: false
##     anonymous_protocol: sasl_anon
##
## To use both anonymous and internal authentication:
##
## host_config:
##   "public.example.org":
##     auth_method:
##       - internal
##       - anonymous

###.  ==============
###'  DATABASE SETUP

## ejabberd by default uses the internal Mnesia database,
## so you do not necessarily need this section.
## This section provides configuration examples in case
## you want to use other database backends.
## Please consult the ejabberd Guide for details on database creation.

##
## MySQL server:
##
## odbc_type: mysql
## odbc_server: "server"
## odbc_database: "database"
## odbc_username: "username"
## odbc_password: "password"
##
## If you want to specify the port:
## odbc_port: 1234

##
## PostgreSQL server:
##
## odbc_type: pgsql
## odbc_server: "server"
## odbc_database: "database"
## odbc_username: "username"
## odbc_password: "password"
##
## If you want to specify the port:
## odbc_port: 1234
##
## If you use PostgreSQL, have a large database, and need a
## faster but inexact replacement for "select count(*) from users"
##
## pgsql_users_number_estimate: true

##
## SQLite:
##
## odbc_type: sqlite
## odbc_database: "/path/to/database.db"

##
## ODBC compatible or MSSQL server:
##
## odbc_type: odbc
## odbc_server: "DSN=ejabberd;UID=ejabberd;PWD=ejabberd"

##
## Number of connections to open to the database for each virtual host
##
## odbc_pool_size: 10

##
## Interval to make a dummy SQL request to keep the connections to the
## database alive. Specify in seconds: for example 28800 means 8 hours
##
## odbc_keepalive_interval: undefined

###.  ===============
###'  TRAFFIC SHAPERS

shaper:
  ##
  ## The "normal" shaper limits traffic speed to 1000 B/s
  ##
  normal: 1000

  ##
  ## The "fast" shaper limits traffic speed to 50000 B/s
  ##
  fast: 50000

##
## This option specifies the maximum number of elements in the queue
## of the FSM. Refer to the documentation for details.
##
max_fsm_queue: 1000

###.   ====================
###'   ACCESS CONTROL LISTS
acl:
  ##
  ## The 'admin' ACL grants administrative privileges to XMPP accounts.
  ## You can put here as many accounts as you want.
  ##
  ## admin:
  ##   user:
  ##     - "aleksey": "localhost"
  ##     - "ermine": "example.org"
  ##
  ## Blocked users
  ##
  ## blocked:
  ##   user:
  ##     - "baduser": "example.org"
  ##     - "test"

  ## Local users: don't modify this.
  ##
  local:
    user_regexp: ""

  ##
  ## More examples of ACLs
  ##
  ## jabberorg:
  ##   server:
  ##     - "jabber.org"
  ## aleksey:
  ##   user:
  ##     - "aleksey": "jabber.ru"
  ## test:
  ##   user_regexp: "^test"
  ##   user_glob: "test*"

  ##
  ## Loopback network
  ##
  loopback:
    ip:
      - "127.0.0.0/8"

  ##
  ## Bad XMPP servers
  ##
  ## bad_servers:
  ##   server:
  ##     - "xmpp.zombie.org"
  ##     - "xmpp.spam.com"

##
## Define specific ACLs in a virtual host.
##
## host_config:
##   "localhost":
##     acl:
##       admin:
##         user:
##           - "bob-local": "localhost"

###.  ============
###'  ACCESS RULES
access:
  ## Maximum number of simultaneous sessions allowed for a single user:
  max_user_sessions:
    all: 10
  ## Maximum number of offline messages that users can have:
  max_user_offline_messages:
    admin: 5000
    all: 100
  ## This rule allows access only for local users:
  local:
    local: allow
  ## Only non-blocked users can use c2s connections:
  c2s:
    blocked: deny
    all: allow
  ## For C2S connections, all users except admins use the "normal" shaper
  c2s_shaper:
    admin: none
    all: normal
  ## All S2S connections use the "fast" shaper
  s2s_shaper:
    all: fast
  ## Only admins can send announcement messages:
  announce:
    admin: allow
  ## Only admins can use the configuration interface:
  configure:
    admin: allow
  ## Admins of this server are also admins of the MUC service:
  muc_admin:
    admin: allow
  ## Only accounts of the local ejabberd server can create rooms:
  muc_create:
    local: allow
  ## All users are allowed to use the MUC service:
  muc:
    all: allow
  ## Only accounts on the local ejabberd server can create Pubsub nodes:
  pubsub_createnode:
    local: allow
  ## In-band registration allows registration of any possible username.
  ## To disable in-band registration, replace 'allow' with 'deny'.
  register:
    all: allow
  ## Only allow to register from localhost
  trusted_network:
    loopback: allow
  ## Do not establish S2S connections with bad servers
  ## s2s:
  ##   bad_servers: deny
  ##   all: allow

## By default the frequency of account registrations from the same IP
## is limited to 1 account every 10 minutes. To disable, specify: infinity
## registration_timeout: 600
 
##
## Define specific Access Rules in a virtual host.
##
## host_config:
##   "localhost":
##     access:
##       c2s:
##         admin: allow
##         all: deny
##       register:
##         all: deny

###.  ================
###'  DEFAULT LANGUAGE

##
## language: Default language used for server messages.
##
language: "en"

##
## Set a different default language in a virtual host.
##
## host_config:
##   "localhost":
##     language: "ru"

###.  =======
###'  CAPTCHA

##
## Full path to a script that generates the image.
##
## captcha_cmd: "/lib/ejabberd/priv/bin/captcha.sh"

##
## Host for the URL and port where ejabberd listens for CAPTCHA requests.
##
## captcha_host: "example.org:5280"

##
## Limit CAPTCHA calls per minute for JID/IP to avoid DoS.
##
## captcha_limit: 5

###.  =======
###'  MODULES

##
## Modules enabled in all ejabberd virtual hosts.
##
modules:
  mod_adhoc: {}
  ## mod_admin_extra: {}
  mod_announce: # recommends mod_adhoc
    access: announce
  mod_blocking: {} # requires mod_privacy
  mod_caps: {}
  mod_carboncopy: {}
  mod_client_state: {}
  mod_configure: {} # requires mod_adhoc
  mod_disco: {}
  ## mod_echo: {}
  mod_irc: {}
  mod_http_bind: {}
  ## mod_http_fileserver:
  ##   docroot: "/var/www"
  ##   accesslog: "/var/log/ejabberd/access.log"
  mod_last: {}
  mod_muc:
    ## host: "conference.@HOST@"
    access: muc
    access_create: muc_create
    access_persistent: muc_create
    access_admin: muc_admin
  ## mod_muc_log: {}
  ## mod_multicast: {}
  mod_offline:
    access_max_user_messages: max_user_offline_messages
  mod_ping: {}
  ## mod_pres_counter:
  ##   count: 5
  ##   interval: 60
  mod_privacy: {}
  mod_private: {}
  ## mod_proxy65: {}
  mod_pubsub:
    access_createnode: pubsub_createnode
    ## reduces resource comsumption, but XEP incompliant
    ignore_pep_from_offline: true
    ## XEP compliant, but increases resource comsumption
    ## ignore_pep_from_offline: false
    last_item_cache: false
    plugins:
      - "flat"
      - "hometree"
      - "pep" # pep requires mod_caps
  mod_register:
    ##
    ## Protect In-Band account registrations with CAPTCHA.
    ##
    ## captcha_protected: true

    ##
    ## Set the minimum informational entropy for passwords.
    ##
    ## password_strength: 32

    ##
    ## After successful registration, the user receives
    ## a message with this subject and body.
    ##
    welcome_message:
      subject: "Welcome!"
      body: |-
        Hi.
        Welcome to this XMPP server.

    ##
    ## When a user registers, send a notification to
    ## these XMPP accounts.
    ##
    ## registration_watchers:
    ##   - "admin1@example.org"

    ##
    ## Only clients in the server machine can register accounts
    ##
    ip_access: trusted_network

    ##
    ## Local c2s or remote s2s users cannot register accounts
    ##
    ## access_from: deny

    access: register
  mod_roster: {}
  mod_shared_roster: {}
  mod_stats: {}
  mod_time: {}
  mod_vcard:
    search: false
  mod_version: {}

##
## Enable modules with custom options in a specific virtual host
##
## host_config:
##   "localhost":
##     modules:
##       mod_echo:
##         host: "mirror.localhost"

##
## Enable modules management via ejabberdctl for installation and
## uninstallation of public/private contributed modules
## (enabled by default)
##

allow_contrib_modules: true

###.
###'
### Local Variables:
### mode: yaml
### End:
### vim: set filetype=yaml tabstop=8 foldmarker=###',###. foldmethod=marker:
#

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