Dump1090-fa process overloading CPU at 100% and stops responding/processing data

[gyrex]

Running PiAware 4.0 on a RPi 3B+ but every day or so I find the dump1090-fa process goes from 25% CPU usage to 100% and it stops processing any data. Trying to kill the process with the kill command doesn’t work so I have to send a -9 signal to the process then restart the dump1090-fa service again.

Is there any way to provide logs to see what’s happening?

[wiedehopf]

I’ve had some similar faults quite some time ago and the issue was the power supply.

If this command gives you any output you need to replace your power supply with a proper one (no phone charger):

sudo dmesg --ctime | grep voltage

You can check the dump1090-fa log … but i doubt it’ll say anything useful:

sudo journalctl --no-pager -u dump1090-fa

Smells like an error in the rtl-sdr or USB library. (but that’s guessing a bit )

[obj]

@gyrex

Is there any way to provide logs to see what’s happening?

You can try attaching gdb to get a stack dump when it’s in the bad state:

sudo apt-get install dump1090-fa-dbgsym

sudo gdb -p <pid of dump1090-fa>

(gdb) info threads
(gdb) bt

Another thing to try is strace:

sudo strace -f -o /tmp/log -p <pid of dump1090-fa>
# control-C after a few seconds, look in /tmp/log (it will be large)

[gyrex]

sudo dmesg --ctime | grep voltage

reveals

Under- **voltage** detected!

Thanks mate. I’ll run a 3A power supply and hopefully that fixes it.