Logfile is not updating on macOS with KM 8.0.19 next after some time

Help & Support
1

Dear Mugen Team,

After some time, no new informations are send to the karaoke Mugen log file.
When I open the the Log in Mugen, all the messages directly appears in the log file at once.
We are using a script, that is looking for the stop/start messages to trigger our light console, so after some time, the script is not working, because no informations are send to the karaoke Mugen log.

Best Regards,
Niklas

2

Now that’s weird.

Is it looking into the file log itself ? COuld it be that it happened after midnight where logs are rotated automatically?

3

Hi Axel, we are using the Logfile directly.
When we open it as with a text editor, it also contains no new informations

#!/bin/bash

DATE=$(date '+%Y-%m-%d')

# Set the log file to monitor
LOG_FILE="/Users/niklas/Library/Application Support/karaokemugen-app/app/logs/karaokemugen-${DATE}.log"
echo Using the following Karaoke Mugen Log:
echo $LOG_FILE

# Function to execute the MIDI command ON
send_midi_command_on() {
    sendmidi dev "IAC-Treiber Bus 1" on 1 1
    echo "Lights are turning on"
    echo "MIDI command sent: sendmidi dev "IAC-Treiber Bus 1" on 1 1"
    date
}

# Function to execute the MIDI command OFF
send_midi_command_off() {
    sendmidi dev "IAC-Treiber Bus 1" on 1 1
    echo "Lights are turning off"
    echo "MIDI command sent: sendmidi dev "IAC-Treiber Bus 1" on 1 1"
    date
}

# Monitor the log file for the keyword "stop" or "Playing "
tail -F "$LOG_FILE" | while read -r line; do
    if [[ "$line" == *"Karaoke stopping NOW"* ]]; then
        send_midi_command_on
    fi
    if [[ "$line" == *"Playing "* ]]; then
        send_midi_command_off
    fi
done

Best Regards,
Niklas

4

It happens after about 30-60 Minutes
Script has been started today 10:00

5

Technically nothing should prevent the log file from being wirtten to. Even on macOS. We’ll need to try to investigate that sometime yeah

6

Here a directly view of the log file:

7

I’ve left it running for 70 minutes on our mac mini and your script still works here. It picks up when a song is played still, so I’m not able to reproduce your issue for some reason :confused: