Metrics occassionally spuriously show "Unknown"

[mcm001]

Describe the bug

After flashing dev-v2025.0.0-beta-8-42-g04e28bc2 on my Orange Pi 5, when refreshing metrics, metrics will sometimes show "unknown". Logs don't inidcate any commands failed either.

Screenshots / Videos

[08:58:25] [2025-01-13 16:58:15] [General - MetricsManager] [DEBUG] Publishing Metrics...
[08:58:25] [2025-01-13 16:58:15] [General - ShellExec] [DEBUG] Executing "cat /sys/class/thermal/thermal_zone1/temp | awk '{printf "%.1f", $1/1000}'"
[08:58:25] [2025-01-13 16:58:15] [General - ShellExec] [DEBUG] Got exit code 0
[08:58:25] [2025-01-13 16:58:15] [General - ShellExec] [DEBUG] Executing "top -bn1 | grep "Cpu(s)" | sed "s/.*, *\([0-9.]*\)%* id.*/\1/" | awk '{print 100 - $1}'"
[08:58:25] [2025-01-13 16:58:15] [General - ShellExec] [DEBUG] Got exit code 0
[08:58:25] [2025-01-13 16:58:15] [General - ShellExec] [DEBUG] Executing "uptime -p | cut -c 4-"
[08:58:25] [2025-01-13 16:58:15] [General - ShellExec] [DEBUG] Got exit code 0
[08:58:25] [2025-01-13 16:58:15] [General - ShellExec] [DEBUG] Executing "free -m | awk 'FNR == 2 {print $3}'"
[08:58:25] [2025-01-13 16:58:15] [General - ShellExec] [DEBUG] Got exit code 0
[08:58:25] [2025-01-13 16:58:15] [General - ShellExec] [DEBUG] Executing "df ./ --output=pcent | tail -n +2"
[08:58:25] [2025-01-13 16:58:15] [General - ShellExec] [DEBUG] Got exit code 0
[08:58:25] [2025-01-13 16:58:15] [General - ShellExec] [DEBUG] Executing "cat /sys/kernel/debug/rknpu/load | sed 's/NPU load://; s/^ *//; s/ *$//'"
[08:58:25] [2025-01-13 16:58:15] [General - ShellExec] [DEBUG] Got exit code 0
[08:58:25] [2025-01-13 16:58:15] [General - MetricsManager] [DEBUG] Requesting IP addresses for "end1"
[08:58:25] [2025-01-13 16:58:15] [General - MetricsManager] [DEBUG] Got value "10.0.0.182/8"
[08:58:25] [2025-01-13 16:58:15] [WebServer - Server] [DEBUG] Handled HTTP request of type POST from endpoint /api/utils/publishMetrics of req size 0 bytes & type null with return code 204 for host 10.0.0.118 in 279.6006 ms

photonvision-logs(3).zip

Platform:

• Hardware Platform: Orange Pi 5
• Network Configuration: Home router
• PhotonVision Version: dev-v2025.0.0-beta-8-42-g04e28bc2