Accumulating memory consumption in MPD while streaming to Icecast

Troubleshooting
1

I’m trying to troubleshoot why MPD is slowly increasing in memory as it streams to Icecast from the same DietPi machine.

I’m using the default MPD and Icecast2 from dietpi-software. I’m using myMPD as client, with its settings as Jukebox hopefully continually running 24/7. MPD is configured to output an mp3-encoded shoutcast stream which Icecast2 receives.

myMPD and Icecast look fine but when I check MPD through dietpi-services the memory slowly increases until the service stops responding at 2.1GB. I’m using a 4GB Pi4. I can remedy this by manually restarting MPD service but this is not an ideal workaround.

Below are the logs and possibly-relevant mpd settings. Hoping someone has ideas on how to troubleshoot.

Regards.

log

 ● mpd.service - Music Player Daemon
│      Loaded: loaded (/lib/systemd/system/mpd.service; disabled; vendor preset: enabled)
│     Drop-In: /etc/systemd/system/mpd.service.d
│              └─dietpi-services_edit.conf, dietpi.conf
│      Active: active (running) since Mon 2022-02-28 01:31:25 JST; 5h 57min ago
│        Docs: man:mpd(1)
│              man:mpd.conf(5)
│              file:///usr/share/doc/mpd/html/user.html
│    Main PID: 39275 (mpd)
│       Tasks: 7 (limit: 4472)
│      Memory: 727.1M
│         CPU: 53min 17.090s
│      CGroup: /system.slice/mpd.service
│              └─39275 /usr/bin/mpd --no-daemon

sample log error when 2.1GB reached
│ Feb 28 07:35:10 musicpi mpd[39275]: exception: Failed to play on "music stream" (shout): Lost shout
│ connection to localhost:8000: Socket error

mpd.conf

# An example of a shout output (for streaming to Icecast):
#
audio_output {
        type            "shout"
        encoder         "lame"          # optional
        name            "music stream"
        host            "localhost"
        port            "8000"
        mount           "/mpd.mp3"
        password        "hackme"
#       quality         "5.0"
        bitrate         "128"
        format          "48000:16:1"
        protocol        "icecast2"              # optional
##      user            "source"                # optional
        description     ""     # optional
##      url             "http://example.com"    # optional
        genre           ""                 # optional
##      public          "no"                    # optional
##      timeout         "2"                     # optional
##      mixer_type      "software"              # optional
#}

input_cache {
        size "256 MB"
}