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#1 2011-02-09 23:55:55

flako
Member
Registered: 2008-10-24
Posts: 56

MPD Error: Connection refused

I think since the last update, mpd will refuse to connect. The daemon seems to crash when I try to update the music database throgh ncmpcpp. I used to run it as a daemon, launching it at startup. But I have also tried running it as 'myself' to see if that fixed any problems.  I have tried searching for solutions, but nothing has worked. This is the output when I run it as 'myself' $  mpd --no-daemon

listen: bind to '0.0.0.0:6600' failed: Address already in use (continuing anyway, because binding to '[::]:6600' succeeded)
daemon: cannot init supplementary groups of user "flako": Operation not permitted
Floating point exception

Before this, when running it as a daemon I got a "connection refused" error in ncmpcpp everytime I hit 'u'. The log file didn't show anything particular, just adding a bunch of albums. I'vet got quite a lot of music, but I guess it shouldn't be a problem for mpd (and it has worked before).

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#2 2011-02-11 16:43:06

Rasi
Member
From: Germany
Registered: 2007-08-14
Posts: 1,912
Website

Re: MPD Error: Connection refused

You cannot run mpd as your own user this way. First you need to make sure to comment out users and groups in mpd.conf, because only root can change to those.
2nd make sure all mpd directories/files are readable by user $MYSELF.

To the other error: thats normal, stricktly bind it to your computers IP (e.g. 127.0.0.1 or 192.168.0.1 for access from outside). If it still complains get rid of the ipv6 module.
In any case, this error is quite harmless.

To your connection refused problem:
Make sure the command

ldd `which mpd` | grep wrap

does not return anything.

If it does, you have to put mpd to the list of allowed applications in /etc/hosts.allow


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#3 2011-02-12 11:47:55

flako
Member
Registered: 2008-10-24
Posts: 56

Re: MPD Error: Connection refused

I know I have to change the config file, and I did already. Anyway, while searching for errors I have gone back to running it as the mpd user.   But I still get the same error, with "failed to bind" and later the connection refused error.

When I rund the ldd command it returns:

libwrap.so.0 => /usr/lib/libwrap.so.0 (0x00007effc27e8000)

And I had already added mpd to the hosts.allow list, but maybe I did it the wrong way?

My /etc/hosts.allow file looks like this:

#
# /etc/hosts.allow
#
mpd: ALL

# End of file

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#4 2011-02-14 23:42:44

flako
Member
Registered: 2008-10-24
Posts: 56

Re: MPD Error: Connection refused

Shouldn't mpd-0.16.1-1 be compiled without libwrap? Or am I missing something? I still get the same error when trying to run mpd as a normal user. I tried making a new install of mpd, removing all old config files I had earlier and setting it up to run as the normal user. This is my mpd.conf:

# An example configuration file for MPD
# See the mpd.conf man page for a more detailed description of each parameter.


# Files and directories #######################################################
#
# This setting controls the top directory which MPD will search to discover the
# available audio files and add them to the daemon's online database. This 
# setting defaults to the XDG directory, otherwise the music directory will be
# be disabled and audio files will only be accepted over ipc socket (using
# file:// protocol) or streaming files over an accepted protocol.
#
music_directory        "/media/Samsung_400GiB/Music"
#
# This setting sets the MPD internal playlist directory. The purpose of this
# directory is storage for playlists created by MPD. The server will use 
# playlist files not created by the server but only if they are in the MPD
# format. This setting defaults to playlist saving being disabled.
#
playlist_directory "/home/flako/.mpd/playlists"
#
# This setting sets the location of the MPD database. This file is used to
# load the database at server start up and store the database while the 
# server is not up. This setting defaults to disabled which will allow
# MPD to accept files over ipc socket (using file:// protocol) or streaming
# files over an accepted protocol.
#
db_file "/home/flako/.mpd/db"
# 
# These settings are the locations for the daemon log files for the daemon.
# These logs are great for troubleshooting, depending on your log_level
# settings.
#
# The special value "syslog" makes MPD use the local syslog daemon. This
# setting defaults to logging to syslog, otherwise logging is disabled.
#
log_file "/home/flako/.mpd/mpd.log"
#
# This setting sets the location of the file which stores the process ID
# for use of mpd --kill and some init scripts. This setting is disabled by
# default and the pid file will not be stored.
#
pid_file "/home/flako/.mpd/mpd.pid"
#
# This setting sets the location of the file which contains information about
# most variables to get MPD back into the same general shape it was in before
# it was brought down. This setting is disabled by default and the server 
# state will be reset on server start up.
#
#state_file "/var/lib/mpd/mpdstate"
#
# The location of the sticker database.  This is a database which
# manages dynamic information attached to songs.
#
#sticker_file            "~/.mpd/sticker.sql"
#
###############################################################################


# General music daemon options ################################################
#
# This setting specifies the user that MPD will run as. MPD should never run as
# root and you may use this setting to make MPD change its user ID after
# initialization. This setting is disabled by default and MPD is run as the
# current user.
#
#user "mpd"
#
# This setting specifies the group that MPD will run as. If not specified
# primary group of user specified with "user" setting will be used (if set).
# This is useful if MPD needs to be a member of group such as "audio" to
# have permission to use sound card.
#
#group                "nogroup"
#
# This setting sets the address for the daemon to listen on. Careful attention
# should be paid if this is assigned to anything other then the default, any.
# This setting can deny access to control of the daemon.
#
# For network
#bind_to_address        "any"
#
# And for Unix Socket
#bind_to_address        "~/.mpd/socket"
#
# This setting is the TCP port that is desired for the daemon to get assigned
# to.
#
#port                "6600"
#
# This setting controls the type of information which is logged. Available 
# setting arguments are "default", "secure" or "verbose". The "verbose" setting
# argument is recommended for troubleshooting, though can quickly stretch
# available resources on limited hardware storage.
#
#log_level            "default"
#
# If you have a problem with your MP3s ending abruptly it is recommended that 
# you set this argument to "no" to attempt to fix the problem. If this solves
# the problem, it is highly recommended to fix the MP3 files with vbrfix
# (available from <http://www.willwap.co.uk/Programs/vbrfix.php>), at which
# point gapless MP3 playback can be enabled.
#
#gapless_mp3_playback            "yes"
#
# This setting enables MPD to create playlists in a format usable by other
# music players.
#
#save_absolute_paths_in_playlists    "no"
#
# This setting defines a list of tag types that will be extracted during the 
# audio file discovery process. Optionally, 'comment' can be added to this
# list.
#
#metadata_to_use    "artist,album,title,track,name,genre,date,composer,performer,disc"
#
# This setting enables automatic update of MPD's database when files in 
# music_directory are changed.
#
#auto_update    "yes"
#
# Limit the depth of the directories being watched, 0 means only watch
# the music directory itself.  There is no limit by default.
#
#auto_update_depth "3"
#
###############################################################################


# Symbolic link behavior ######################################################
#
# If this setting is set to "yes", MPD will discover audio files by following 
# symbolic links outside of the configured music_directory.
#
#follow_outside_symlinks    "yes"
#
# If this setting is set to "yes", MPD will discover audio files by following
# symbolic links inside of the configured music_directory.
#
#follow_inside_symlinks        "yes"
#
###############################################################################


# Zeroconf / Avahi Service Discovery ##########################################
#
# If this setting is set to "yes", service information will be published with
# Zeroconf / Avahi.
#
#zeroconf_enabled        "yes"
#
# The argument to this setting will be the Zeroconf / Avahi unique name for
# this MPD server on the network.
#
#zeroconf_name            "Music Player"
#
###############################################################################


# Permissions #################################################################
#
# If this setting is set, MPD will require password authorization. The password
# can setting can be specified multiple times for different password profiles.
#
#password                        "password@read,add,control,admin"
#
# This setting specifies the permissions a user has who has not yet logged in. 
#
#default_permissions             "read,add,control,admin"
#
###############################################################################


# Input #######################################################################
#
#
#input {
#        plugin "curl"
#       proxy "proxy.isp.com:8080"
#       proxy_user "user"
#       proxy_password "password"
#}
#
#
###############################################################################

# Audio Output ################################################################
#
# MPD supports various audio output types, as well as playing through multiple 
# audio outputs at the same time, through multiple audio_output settings 
# blocks. Setting this block is optional, though the server will only attempt
# autodetection for one sound card.
#
# See <http://mpd.wikia.com/wiki/Configuration#Audio_Outputs> for examples of 
# other audio outputs.
#
# An example of an ALSA output:
#
#audio_output {
#    type        "alsa"
#    name        "My ALSA Device"
##    device        "hw:0,0"    # optional
##    format        "44100:16:2"    # optional
#    mixer_type      "hardware"    # optional
#    mixer_device    "default"    # optional
#    mixer_control    "PCM"        # optional
##    mixer_index    "0"        # optional
#}
#
# An example of an OSS output:
#
#audio_output {
#    type        "oss"
#    name        "My OSS Device"
##    device        "/dev/dsp"    # optional
##    format        "44100:16:2"    # optional
##    mixer_type      "hardware"    # optional
##    mixer_device    "/dev/mixer"    # optional
##    mixer_control    "PCM"        # optional
#}
#
# An example of a shout output (for streaming to Icecast):
#
#audio_output {
#    type        "shout"
#    encoding    "ogg"            # optional
#    name        "My Shout Stream"
#    host        "localhost"
#    port        "8000"
#    mount        "/mpd.ogg"
#    password    "hackme"
#    quality        "5.0"
#    bitrate        "128"
#    format        "44100:16:1"
##    protocol    "icecast2"        # optional
##    user        "source"        # optional
##    description    "My Stream Description"    # optional
##    genre        "jazz"            # optional
##    public        "no"            # optional
##    timeout        "2"            # optional
##    mixer_type      "software"        # optional
#}
#
# An example of a recorder output:
#
#audio_output {
#    type        "recorder"
#    name        "My recorder"
#    encoder        "vorbis"        # optional, vorbis or lame
#    path        "/var/lib/mpd/recorder/mpd.ogg"
##    quality        "5.0"            # do not define if bitrate is defined
#    bitrate        "128"            # do not define if quality is defined
#    format        "44100:16:1"
#}
#
# An example of a httpd output (built-in HTTP streaming server):
#
#audio_output {
#    type        "httpd"
#    name        "My HTTP Stream"
#    encoder        "vorbis"        # optional, vorbis or lame
#    port        "8000"
#    bind_to_address    "0.0.0.0"        # optional, IPv4 or IPv6
##    quality        "5.0"            # do not define if bitrate is defined
#    bitrate        "128"            # do not define if quality is defined
#    format        "44100:16:1"
#    max_clients    "0"            # optional 0=no limit
#}
#
# An example of a pulseaudio output (streaming to a remote pulseaudio server)
#
#audio_output {
#    type        "pulse"
#    name        "My Pulse Output"
##    server        "remote_server"        # optional
##    sink        "remote_server_sink"    # optional
#}
#
## Example "pipe" output:
#
#audio_output {
#    type        "pipe"
#    name        "my pipe"
#    command        "aplay -f cd 2>/dev/null"
## Or if you're want to use AudioCompress
#    command        "AudioCompress -m | aplay -f cd 2>/dev/null"
## Or to send raw PCM stream through PCM:
#    command        "nc example.org 8765"
#    format        "44100:16:2"
#}
#
## An example of a null output (for no audio output):
#
#audio_output {
#    type        "null"
#    name        "My Null Output"
#    mixer_type      "none"            # optional
#}
#
# This setting will change all decoded audio to be converted to the specified
# format before being passed to the audio outputs. By default, this setting is
# disabled.
#
#audio_output_format        "44100:16:2"
#
# If MPD has been compiled with libsamplerate support, this setting specifies 
# the sample rate converter to use.  Possible values can be found in the 
# mpd.conf man page or the libsamplerate documentation. By default, this is
# setting is disabled.
#
#samplerate_converter        "Fastest Sinc Interpolator"
#
###############################################################################


# Normalization automatic volume adjustments ##################################
#
# This setting specifies the type of ReplayGain to use. This setting can have
# the argument "off", "album" or "track". See <http://www.replaygain.org>
# for more details. This setting is off by default.
#
#replaygain            "album"
#
# This setting sets the pre-amp used for files that have ReplayGain tags. By
# default this setting is disabled.
#
#replaygain_preamp        "0"
#
# This setting enables on-the-fly normalization volume adjustment. This will
# result in the volume of all playing audio to be adjusted so the output has 
# equal "loudness". This setting is disabled by default.
#
#volume_normalization        "no"
#
###############################################################################


# MPD Internal Buffering ######################################################
#
# This setting adjusts the size of internal decoded audio buffering. Changing
# this may have undesired effects. Don't change this if you don't know what you
# are doing.
#
#audio_buffer_size        "2048"
#
# This setting controls the percentage of the buffer which is filled before 
# beginning to play. Increasing this reduces the chance of audio file skipping, 
# at the cost of increased time prior to audio playback.
#
#buffer_before_play        "10%"
#
###############################################################################


# Resource Limitations ########################################################
#
# These settings are various limitations to prevent MPD from using too many
# resources. Generally, these settings should be minimized to prevent security
# risks, depending on the operating resources.
#
#connection_timeout        "60"
#max_connections        "10"
#max_playlist_length        "16384"
#max_command_list_size        "2048"
#max_output_buffer_size        "8192"
#
###############################################################################


# Character Encoding ##########################################################
#
# If file or directory names do not display correctly for your locale then you 
# may need to modify this setting.
#
#filesystem_charset        "UTF-8"
#
# This setting controls the encoding that ID3v1 tags should be converted from.
#
#id3v1_encoding            "ISO-8859-1"
#
###############################################################################


# SIDPlay decoder #############################################################
#
# songlength_database:
#  Location of your songlengths file, as distributed with the HVSC.
#  The sidplay plugin checks this for matching MD5 fingerprints.
#  See http://www.c64.org/HVSC/DOCUMENTS/Songlengths.faq
#
# default_songlength:
#  This is the default playing time in seconds for songs not in the
#  songlength database, or in case you're not using a database.
#  A value of 0 means play indefinitely.
#
# filter:
#  Turns the SID filter emulation on or off.
#
#decoder {
#    plugin            "sidplay"
#    songlength_database    "/media/C64Music/DOCUMENTS/Songlengths.txt"
#    default_songlength    "120"
#    filter "true"
#}
#
###############################################################################

But I still get the same adress already in use error. Weirdly, I seem to have gotten hold of a new error now that I startded with a 'clean' database-file. Something about a corrupted database...

 mpd --verbose .mpd/mpd.conf 
config: loading file .mpd/mpd.conf
listen: bind to '0.0.0.0:6600' failed: Address already in use (continuing anyway, because binding to '[::]:6600' succeeded)
path: path_set_fs_charset: fs charset is: UTF-8
Failed to load database: Database corrupted
output: No "audio_output" defined in config file
output: Attempt to detect audio output device
output: Attempting to detect a alsa audio device
output: Successfully detected a alsa audio device
disabling the last.fm playlist plugin because account is not configured
daemon: opening pid file
daemon: daemonized!
daemon: writing pid file

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#5 2011-02-15 15:38:41

Rasi
Member
From: Germany
Registered: 2007-08-14
Posts: 1,912
Website

Re: MPD Error: Connection refused

flako wrote:

...

Dont worry much about this error. MPD simply binds to your ipv6 interface first, which makes the same address unavailable for ipv4.
simply bind mpd to 127.0.0.1 exclusively in mpd.conf or (more brutal) remove the ipv6 module.


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#6 2011-02-15 19:48:47

flako
Member
Registered: 2008-10-24
Posts: 56

Re: MPD Error: Connection refused

Rasi wrote:
flako wrote:

...

(...)simply bind mpd to 127.0.0.1

Thanks, that fixed the adress already in use error! But the biggesst error still remains, I still get the "connection refused" when running ncmpcpp or mpc. Maybe it has something to do with the database? Since I removed all my old files I still get the connection refused error on the client side, but now at least there seems to be something related to that in the mpd output. As you can see in my earlier post

Failed to load database: Database corrupted

Could this be what's causing the connection refused error? The weird thing is that my database file is completely empty...

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#7 2011-02-15 20:02:47

.:B:.
Forum Fellow
Registered: 2006-11-26
Posts: 5,819

Re: MPD Error: Connection refused

It's not related. If it was, that would mean MPD would not start up until you generated a database.


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#8 2011-02-15 20:24:29

Rasi
Member
From: Germany
Registered: 2007-08-14
Posts: 1,912
Website

Re: MPD Error: Connection refused

flako wrote:
Rasi wrote:
flako wrote:

...

(...)simply bind mpd to 127.0.0.1

Thanks, that fixed the adress already in use error! But the biggesst error still remains, I still get the "connection refused" when running ncmpcpp or mpc. Maybe it has something to do with the database? Since I removed all my old files I still get the connection refused error on the client side, but now at least there seems to be something related to that in the mpd output. As you can see in my earlier post

Failed to load database: Database corrupted

Could this be what's causing the connection refused error? The weird thing is that my database file is completely empty...

delete that file. mpd does not create a database file, before scanning completed. So its likely anything went wrong there.


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#9 2011-02-16 13:13:20

flako
Member
Registered: 2008-10-24
Posts: 56

Re: MPD Error: Connection refused

Ok, I deleted the file. But now I get this error when trying to run mpd:

 mpd --verbose .mpd/mpd.conf
config: loading file .mpd/mpd.conf
path: path_set_fs_charset: fs charset is: UTF-8
[b]Failed to load database: Failed to open database file "/home/flako/.mpd/mpd.db": No such file or directory[/b]
output: No "audio_output" defined in config file
output: Attempt to detect audio output device
output: Attempting to detect a alsa audio device
output: Successfully detected a alsa audio device
disabling the last.fm playlist plugin because account is not configured
daemon: opening pid file
daemon: daemonized!
daemon: writing pid file

And still, connection refused.

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#10 2011-02-16 17:46:44

Rasi
Member
From: Germany
Registered: 2007-08-14
Posts: 1,912
Website

Re: MPD Error: Connection refused

there is no error message. the warning about missing db file is obvious - it will be created.
Be aware that the file wont be written, until the scanning finished.

About the connection refused error:

maybe you have some wrong settings in ~/.ncmpcpp/config

try this:

MPD_HOST=127.0.0.1 mpc status

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#11 2011-02-18 12:18:51

flako
Member
Registered: 2008-10-24
Posts: 56

Re: MPD Error: Connection refused

That didn't change anything. And I don't know if I said it earlier but I get the same connection refused error when I run mpc. So I don't think it's an ncmpcpp error, but a mpd one.

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#12 2011-02-18 20:31:22

Rasi
Member
From: Germany
Registered: 2007-08-14
Posts: 1,912
Website

Re: MPD Error: Connection refused

well then, i am out of ideas. if you have mpd: ALL in hosts.allow and bind mpd to 127.0.0.1 (and of course connect from localhost - NOT from outside) then you have done all that can be done.

some iptable rules maybe?


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#13 2011-02-23 23:18:05

JMO
Member
From: Argentina
Registered: 2006-04-08
Posts: 98

Re: MPD Error: Connection refused

I've run into the same problem. What I did was to start a clean mpd install:

sudo pkill mpd
sudo pacman -R --nosave mpd
sudo rm -r /var/lib/mpd
sudo rm -r /var/run/mpd

Beware with the above remove commands

Installed git version from AUR (I don't think that has nothing to do with this. Just mentioning it) and prepared a couple of things

mkdir -p ~/.mpd/playlists
sudo cp /usr/share/mpd/mpd.conf.example /etc

Edited the mpd.conf.example in etc

music_directory "~/music"
playlist_directory  "~/.mpd/playlists"
db_file "~/.mpd/mpd.db"
log_file "~/.mpd/mpd.log"
user "[youruser]"
bind_to_address "127.0.0.1"
port "6600"

Then

sudo mv /etc/mpd.conf.example /etc/mpd.conf

Finally, I added this to /etc/hosts.allow

mpd: ALL

I'm using ncmpcpp and mpd is running fine now, but hell... it made me sweat this afternoon =P

Cheers.-

Last edited by JMO (2011-02-23 23:19:17)

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