Error Handling for Offline Thermal Zones

[bnbhat]

Description:

When procfs try to read the offline thermal zones, it gets stuck. please check this issue for more details.

Device:

• Jetson Orin Nano
• Linux 5.15.136-tegra
• node_exporter version 1.9.0

for ex, when it tries to read thermal_zone2, it gets stuck.

$ cat /sys/class/thermal/thermal_zone2/temp
cat: /sys/class/thermal/thermal_zone2/temp: Resource temporarily unavailable

It would be helpful if it could handle this scenario more gracefully.

I have attempted to trace the error, here is the backtrace: