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**Tim Curtis** · 02-03-2024, 02:20 PM

(02-03-2024, 01:14 PM)Nutul Wrote:
(02-03-2024, 12:20 PM)Tim Curtis Wrote: ETA: The OP reported this error message

Code:
"json.parse unexpected character at line 1 column 1 of the json data"

IIRC there is a legit back-end scenario in the genLibrary() routine where the presence of non-UTF8 characters in the song file metadata can result in json parse failing and an empty libcache_.json file.

Since I see no such message template anywhere, it looks like the response of the json.parse method directly from JQuery. This actually denotes an error in the data.

Yes it's prolly empty JSON data being returned by MPD to the front end thats causing the error to be thrown by the JSON parse function. See below.

Code:
// MPD metadata engine

function engineMpd() {

    $.ajax({

        type: 'GET',

        url: 'engine-mpd.php?state=' + MPD.json['state'],

        async: true,

        cache: false,

        success: function(data) {

            debugLog('engineMpd(): success branch: data=(' + data + ')');

            // Always have valid json

            try {

                MPD.json = JSON.parse(data);

                //console.log(MPD.json);

            }

            catch (e) {

                MPD.json['error'] = e;

            }

Why is it empty? Thats what needs to be reproducible in order to possibly improve the error handling and messages.

Nutul · 02-03-2024, 02:29 PM

(02-03-2024, 02:20 PM)Tim Curtis Wrote:
(02-03-2024, 01:14 PM)Nutul Wrote:
(02-03-2024, 12:20 PM)Tim Curtis Wrote: ETA: The OP reported this error message

Code:
"json.parse unexpected character at line 1 column 1 of the json data"

IIRC there is a legit back-end scenario in the genLibrary() routine where the presence of non-UTF8 characters in the song file metadata can result in json parse failing and an empty libcache_.json file.

Since I see no such message template anywhere, it looks like the response of the json.parse method directly from JQuery. This actually denotes an error in the data.

Yes it's prolly empty JSON data being returned by MPD to the front end thats causing the error to be thrown by the JSON parse function. See below.

Code:
// MPD metadata engine function engineMpd() { $.ajax({ type: 'GET', url: 'engine-mpd.php?state=' + MPD.json['state'], async: true, cache: false, success: function(data) { debugLog('engineMpd(): success branch: data=(' + data + ')'); // Always have valid json try { MPD.json = JSON.parse(data); //console.log(MPD.json); } catch (e) { MPD.json['error'] = e; }

Why is it empty? Thats what needs to be reproducible in order to possibly improve the error handling and messages.

This...

Code:
engine-mpd.php?state=' + MPD.json['state']

together with this...?

Code:
// Check for Worker startup complete

if ($result[0]['value'] == '0') {

    exit; // Worker startup is not finished yet');

}

**Tim Curtis** · 02-03-2024, 02:37 PM

Could be but to confirm there needs to be a recipe for reproducing the error that was mentioned earlier.

ColinM · (This post was last modified: 02-03-2024, 08:39 PM by ColinM.)

(02-03-2024, 02:37 PM)Tim Curtis Wrote: Could be but to confirm there needs to be a recipe for reproducing the error that was mentioned earlier.

My infallible recipe for this error is to initiate a restart from Firefox on Windows. This produces 5 or 6 error popups with "json.parse unexpected character at line 1 column 1 of the json data" before the player screen loads.

Restarting from Vivaldi on Windows or Chromium on Raspberry Pi OS doesn't do anything odd.

Startup log from Firefox restart:

Code:
20240203 202658 worker: --

20240203 202658 worker: -- Start moOde 8 series

20240203 202658 worker: --

20240203 202658 worker: Successfully daemonized

20240203 202658 worker: Wait for Linux startup...

20240203 202753 worker: Linux startup complete

20240203 202753 worker: Boot config backed up

20240203 202755 worker: Session loaded

20240203 202756 worker: Package holds applied

20240203 202757 worker: File check complete

20240203 202757 worker: Debug logging off

20240203 202757 worker: Reduced logging off

20240203 202757 worker: --

20240203 202757 worker: -- Audio debug

20240203 202757 worker: --

20240203 202757 worker: ALSA cards:  0:IQaudIODAC | 1:empty | 2:empty | 3:empty

20240203 202757 worker: MPD config:  0:IQaudIO Pi-DAC+ | mixer:Digital | cardnum:0

20240203 202757 worker: Mixer name:  [Digital]

20240203 202757 worker: Hdwr volume: set to 0%

20240203 202757 worker: --

20240203 202757 worker: -- System

20240203 202757 worker: --

20240203 202759 worker: Host:     Main

20240203 202759 worker: Model:    Pi-4B 1.1 2GB

20240203 202759 worker: moOde:    8.3.7 2023-12-07

20240203 202759 worker: RaspiOS:  11.5 Bullseye 64-bit

20240203 202759 worker: Kernel:   6.1.21 64-bit

20240203 202759 worker: MPD ver:  0.23.14

20240203 202759 worker: CPU gov:  ondemand

20240203 202759 worker: Userid:   pi

20240203 202759 worker: Homedir:  /home/pi

20240203 202759 worker: Timezone: Europe/London

20240203 202759 worker: Keyboard: gb

20240203 202759 worker: USB boot: enabled

20240203 202759 worker: File sys: expanded

20240203 202759 worker: HDMI out: off

20240203 202759 worker: Sys LED0: on

20240203 202759 worker: Sys LED1: on

20240203 202759 worker: --

20240203 202759 worker: -- Network

20240203 202759 worker: --

20240203 202759 worker: Eth: adapter exists

20240203 202759 worker: Eth: timeout up to 30 secs

20240203 202759 worker: Eth: method  dhcp

20240203 202759 worker: Eth: address 192.168.1.2

20240203 202759 worker: Eth: netmask 255.255.255.0

20240203 202759 worker: Eth: gateway 192.168.1.1

20240203 202759 worker: Eth: pri DNS 192.168.1.100

20240203 202759 worker: Eth: domain  lan

20240203 202759 worker: Wlan: adapter does not exist

20240203 202759 worker: --

20240203 202759 worker: -- Software update

20240203 202759 worker: --

20240203 202759 worker: Automatic check: on

20240203 202759 worker: Checking for available update...

20240203 202800 worker: Software is up to date

20240203 202800 worker: --

20240203 202800 worker: -- File sharing

20240203 202800 worker: --

20240203 202800 worker: SMB file sharing:  off

20240203 202800 worker: NFS file sharing:  off

20240203 202800 worker: DLNA file sharing: off

20240203 202800 worker: --

20240203 202800 worker: -- Audio config

20240203 202800 worker: --

20240203 202800 worker: MPD config:    updated

20240203 202800 worker: Audio device:  IQaudIO Pi-DAC+

20240203 202800 worker: Formats:       S16_LE, S24_LE, S32_LE

20240203 202800 worker: Mixer type     Hardware

20240203 202800 worker: Mixer name     Digital

20240203 202800 worker: Hdwr volume:   controller detected

20240203 202800 worker: ALSA max vol:  100%

20240203 202800 worker: ALSA card:     0

20240203 202800 worker: ALSA mode:     Default

20240203 202800 worker: ALSA loopback: off

20240203 202800 worker: CamillaDSP:    off

20240203 202800 worker: Renderers:     active flags reset

20240203 202800 worker: --

20240203 202800 worker: -- MPD startup

20240203 202800 worker: --

20240203 202801 worker: MPD service:        started

20240203 202801 worker: MPD port 6600:      accepting connections

20240203 202801 worker: MPD ALSA Default:   on

20240203 202801 worker: MPD ALSA Bluetooth: off

20240203 202801 worker: MPD HTTP Server:    off

20240203 202801 worker: MPD crossfade:      off

20240203 202801 worker: MPD ignore CUE:     yes

20240203 202801 worker: MPD CDSP volsync:   off

20240203 202801 worker: MPD CDSP volrange:  60 dB

20240203 202801 worker: --

20240203 202801 worker: -- Music sources

20240203 202801 worker: --

20240203 202801 worker: USB auto-mount: udisks-glue

20240203 202801 worker: USB drives:     no drives found

20240203 202801 worker: NAS sources:    no music sources defined

20240203 202801 worker: --

20240203 202801 worker: -- Feature availability

20240203 202801 worker: --

20240203 202801 worker: Input select:    available, src MPD, out IQaudIO Pi-DAC+

20240203 202801 worker: Bluetooth:       available, ALSA mode Default

20240203 202801 worker: AirPlay:         available

20240203 202801 worker: Spotify Connect: available

20240203 202801 worker: Squeezelite:     available

20240203 202801 worker: RoonBridge:      not installed

20240203 202801 worker: Multiroom:       available

20240203 202801 worker: UPnP client:     started

20240203 202801 worker: GPIO buttons:    available

20240203 202801 worker: Stream recorder: n/a

20240203 202801 worker: HTTPS-Only mode: n/a

20240203 202801 worker: --

20240203 202801 worker: -- Volume levels

20240203 202801 worker: --

20240203 202801 worker: Volume knob:      50

20240203 202801 worker: Saved MPD volume: 0

20240203 202801 worker: Saved SRC volume: 0

20240203 202801 worker: Hdwr volume:      83%

20240203 202801 worker: --

20240203 202801 worker: -- Peripherals

20240203 202801 worker: --

20240203 202801 worker: Local display:   off

20240203 202801 worker: On-screen kbd:   off

20240203 202801 worker: Rotary encoder:  off

20240203 202801 worker: USB volume knob: off

20240203 202801 worker: LCD updater:     off

20240203 202801 worker: --

20240203 202801 worker: -- Miscellaneous

20240203 202801 worker: --

20240203 202801 worker: Auto-CoverView:    off

20240203 202801 worker: CoverView timeout: Never

20240203 202801 worker: Auto-shuffle:      off

20240203 202801 worker: Auto-play:         off

20240203 202801 worker: Web SSH server:    on

20240203 202801 worker: Maintenance task:  360 mins

20240203 202801 worker: Current view:      reset to Playback

20240203 202802 worker: Session check:     ok

20240203 202802 worker: --

20240203 202802 worker: -- Startup complete 

20240203 202802 worker: --

20240203 202802 worker: Mount monitor:    off

20240203 202802 worker: MPD monitor:      off

20240203 202802 worker: Watchdog monitor: started

20240203 202802 worker: Responsiveness:   Default

20240203 202802 worker: Ready

Colin

Nutul · (This post was last modified: 02-03-2024, 09:00 PM by Nutul.)

This might be expected, then... during a reboot, on a real Pi, the browser doesn't come up so early; here it seems the JS is there waiting / polling... and as soon as the PHP is ready to answer, it does so when the worker is not done yet... fantasizing here, but makes a lot of sense to me...

Of course, acknowledgement of the scenario in the backend could help in showing such errors only when indeed they might be real errors.

**Tim Curtis** · 02-03-2024, 10:01 PM

(02-03-2024, 08:36 PM)ColinM Wrote:
(02-03-2024, 02:37 PM)Tim Curtis Wrote: Could be but to confirm there needs to be a recipe for reproducing the error that was mentioned earlier.

My infallible recipe for this error is to initiate a restart from Firefox on Windows. This produces 5 or 6 error popups with "json.parse unexpected character at line 1 column 1 of the json data" before the player screen loads.

Restarting from Vivaldi on Windows or Chromium on Raspberry Pi OS doesn't do anything odd.

Startup log from Firefox restart:

Code:
20240203 202658 worker: -- 20240203 202658 worker: -- Start moOde 8 series 20240203 202658 worker: -- 20240203 202658 worker: Successfully daemonized 20240203 202658 worker: Wait for Linux startup... 20240203 202753 worker: Linux startup complete 20240203 202753 worker: Boot config backed up 20240203 202755 worker: Session loaded 20240203 202756 worker: Package holds applied 20240203 202757 worker: File check complete 20240203 202757 worker: Debug logging off 20240203 202757 worker: Reduced logging off 20240203 202757 worker: -- 20240203 202757 worker: -- Audio debug 20240203 202757 worker: -- 20240203 202757 worker: ALSA cards: 0:IQaudIODAC | 1:empty | 2:empty | 3:empty 20240203 202757 worker: MPD config: 0:IQaudIO Pi-DAC+ | mixer:Digital | cardnum:0 20240203 202757 worker: Mixer name: [Digital] 20240203 202757 worker: Hdwr volume: set to 0% 20240203 202757 worker: -- 20240203 202757 worker: -- System 20240203 202757 worker: -- 20240203 202759 worker: Host: Main 20240203 202759 worker: Model: Pi-4B 1.1 2GB 20240203 202759 worker: moOde: 8.3.7 2023-12-07 20240203 202759 worker: RaspiOS: 11.5 Bullseye 64-bit 20240203 202759 worker: Kernel: 6.1.21 64-bit 20240203 202759 worker: MPD ver: 0.23.14 20240203 202759 worker: CPU gov: ondemand 20240203 202759 worker: Userid: pi 20240203 202759 worker: Homedir: /home/pi 20240203 202759 worker: Timezone: Europe/London 20240203 202759 worker: Keyboard: gb 20240203 202759 worker: USB boot: enabled 20240203 202759 worker: File sys: expanded 20240203 202759 worker: HDMI out: off 20240203 202759 worker: Sys LED0: on 20240203 202759 worker: Sys LED1: on 20240203 202759 worker: -- 20240203 202759 worker: -- Network 20240203 202759 worker: -- 20240203 202759 worker: Eth: adapter exists 20240203 202759 worker: Eth: timeout up to 30 secs 20240203 202759 worker: Eth: method dhcp 20240203 202759 worker: Eth: address 192.168.1.2 20240203 202759 worker: Eth: netmask 255.255.255.0 20240203 202759 worker: Eth: gateway 192.168.1.1 20240203 202759 worker: Eth: pri DNS 192.168.1.100 20240203 202759 worker: Eth: domain lan 20240203 202759 worker: Wlan: adapter does not exist 20240203 202759 worker: -- 20240203 202759 worker: -- Software update 20240203 202759 worker: -- 20240203 202759 worker: Automatic check: on 20240203 202759 worker: Checking for available update... 20240203 202800 worker: Software is up to date 20240203 202800 worker: -- 20240203 202800 worker: -- File sharing 20240203 202800 worker: -- 20240203 202800 worker: SMB file sharing: off 20240203 202800 worker: NFS file sharing: off 20240203 202800 worker: DLNA file sharing: off 20240203 202800 worker: -- 20240203 202800 worker: -- Audio config 20240203 202800 worker: -- 20240203 202800 worker: MPD config: updated 20240203 202800 worker: Audio device: IQaudIO Pi-DAC+ 20240203 202800 worker: Formats: S16_LE, S24_LE, S32_LE 20240203 202800 worker: Mixer type Hardware 20240203 202800 worker: Mixer name Digital 20240203 202800 worker: Hdwr volume: controller detected 20240203 202800 worker: ALSA max vol: 100% 20240203 202800 worker: ALSA card: 0 20240203 202800 worker: ALSA mode: Default 20240203 202800 worker: ALSA loopback: off 20240203 202800 worker: CamillaDSP: off 20240203 202800 worker: Renderers: active flags reset 20240203 202800 worker: -- 20240203 202800 worker: -- MPD startup 20240203 202800 worker: -- 20240203 202801 worker: MPD service: started 20240203 202801 worker: MPD port 6600: accepting connections 20240203 202801 worker: MPD ALSA Default: on 20240203 202801 worker: MPD ALSA Bluetooth: off 20240203 202801 worker: MPD HTTP Server: off 20240203 202801 worker: MPD crossfade: off 20240203 202801 worker: MPD ignore CUE: yes 20240203 202801 worker: MPD CDSP volsync: off 20240203 202801 worker: MPD CDSP volrange: 60 dB 20240203 202801 worker: -- 20240203 202801 worker: -- Music sources 20240203 202801 worker: -- 20240203 202801 worker: USB auto-mount: udisks-glue 20240203 202801 worker: USB drives: no drives found 20240203 202801 worker: NAS sources: no music sources defined 20240203 202801 worker: -- 20240203 202801 worker: -- Feature availability 20240203 202801 worker: -- 20240203 202801 worker: Input select: available, src MPD, out IQaudIO Pi-DAC+ 20240203 202801 worker: Bluetooth: available, ALSA mode Default 20240203 202801 worker: AirPlay: available 20240203 202801 worker: Spotify Connect: available 20240203 202801 worker: Squeezelite: available 20240203 202801 worker: RoonBridge: not installed 20240203 202801 worker: Multiroom: available 20240203 202801 worker: UPnP client: started 20240203 202801 worker: GPIO buttons: available 20240203 202801 worker: Stream recorder: n/a 20240203 202801 worker: HTTPS-Only mode: n/a 20240203 202801 worker: -- 20240203 202801 worker: -- Volume levels 20240203 202801 worker: -- 20240203 202801 worker: Volume knob: 50 20240203 202801 worker: Saved MPD volume: 0 20240203 202801 worker: Saved SRC volume: 0 20240203 202801 worker: Hdwr volume: 83% 20240203 202801 worker: -- 20240203 202801 worker: -- Peripherals 20240203 202801 worker: -- 20240203 202801 worker: Local display: off 20240203 202801 worker: On-screen kbd: off 20240203 202801 worker: Rotary encoder: off 20240203 202801 worker: USB volume knob: off 20240203 202801 worker: LCD updater: off 20240203 202801 worker: -- 20240203 202801 worker: -- Miscellaneous 20240203 202801 worker: -- 20240203 202801 worker: Auto-CoverView: off 20240203 202801 worker: CoverView timeout: Never 20240203 202801 worker: Auto-shuffle: off 20240203 202801 worker: Auto-play: off 20240203 202801 worker: Web SSH server: on 20240203 202801 worker: Maintenance task: 360 mins 20240203 202801 worker: Current view: reset to Playback 20240203 202802 worker: Session check: ok 20240203 202802 worker: -- 20240203 202802 worker: -- Startup complete 20240203 202802 worker: -- 20240203 202802 worker: Mount monitor: off 20240203 202802 worker: MPD monitor: off 20240203 202802 worker: Watchdog monitor: started 20240203 202802 worker: Responsiveness: Default 20240203 202802 worker: Ready

Colin

I can repro using FF on Mac.

jbaumann · 02-14-2024, 07:27 AM

(01-31-2024, 12:44 PM)Tim Curtis Wrote: The challenge is that we don't test the "broken by apt upgrade update" scenario to learn what exactly gets wrecked because our time is best spent supporting and troubleshooting the built-in updating mechanism.

Btw, the build-in updater can be run from SSH line via the command below and prints status to the terminal as it's working. The script it runs is located in our Updates repo.

Code:
sudo /var/www/util/system-updater.sh moode

To understand how the updater works examine the source code. The same would apply if you want investigate any error messages. or troubleshoot the apt upgrade breakage.

The easiest way to do this is to download the sources from the repo and then use an IDE to globally search the sources for things.

I looked through the source and found it very helpful in switching back between the different versions. Interestingly, downgrading everything to the old versions did result in a system that was still not fully functional, the interaction with CamillaDSP was problematic after the upgrade and then the downgrade.

Might it make sense to do apt-pinning of the versions that are tested for the respective version of Moode? Or at least mark them with apt-mark? Then the other parts of the system could be updated without problems…

I then did the full re-install, and using the backup functionality from the Web GUI this was extremely fast. One observation: It seems that the Restore did not restore the MPD option to write the Metadata to a file…

When running the upgraded versions of everything I had to upgrade the CamillaDSP config as well, but that was straightforward, even without any migration tool. But I had problems with volume control (I‘m using CamillaDSP for that as well), at the beginning of each song the volume was set back to the volume set at the start of the system. Maybe something to check in the upcoming release :-)

And thanks again for the fantastic work. I really love Moode and its functionality.

Cheeers, Joe

bitlab · 02-14-2024, 06:54 PM

apt-mark is already used to protect the packages(see the list at https://github.com/moode-player/pkgbuild...markt.conf).

In your first post you indicated that you forced the upgrade because the system was 'holding back' some packages... that where the packages protected with apt-mark :-(

The volume required unreleased software and configuration files part of the upcoming moode update.

jbaumann · 02-15-2024, 04:21 PM

(02-14-2024, 06:54 PM)bitlab Wrote: apt-mark is already used to protect the packages(see the list at https://github.com/moode-player/pkgbuild...markt.conf).

In your first post you indicated that you forced the upgrade because the system was 'holding back' some packages... that where the packages protected with apt-mark :-(

The volume required unreleased software and configuration files part of the upcoming moode update.

Ah, ok, I overlooked that.

And yes, I forced the upgrade and I‘m fully aware that my approach to updating Linux systems is where the dragons are… :-)

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