CPU 100% on raspberry 3B on openhabian

Setup, Configuration and Use Runtime
1
  • Platform information:
    • Hardware:raspberry 3B
    • OS: openhabian jessie
    • Java Runtime Environment: openjdk version “1.8.0_121”
    • openHAB version: 2.3 stable
  • Issue of the topic: by pass 1 week, openhab cause cpu 100+% on 1 core and cause openhab very slow response for 3 times, 1 time totally no response on console (port 8101)
    as other 3 core on raspberry only on CPU 2x-3x, so raspberry still fast response and able to perform system restart, first 2 times high cpu I only do soft reboot and before third time, I have a power off on raspberry for 10sec+ and issue happen about 1 hours after system start.

I don’t install any new binding or big changes on rules, only upgrade to 2.3 from 2.2, mostly openhab turn slow response after system startup about 30mins to 1 hour, below is last time when my openhab reach 100% CPU and I do a capture threat list, please kindly take a look and let me know what cause high CPU

P.S. due to topic text limit and lost text format, pls check by below link

2

The Zulu Java Runtime is recommended for RPi. There are known problems with running OH on OpenJDK. So I would look at moving to Zulu as a first step.

3

Hi Rich, good to see u again, thanks for quick response, I will change to Zulu in first step and see will this incident happen again

4

HI Rich, I just take a another look, is that mine java actually using Zulu?

[07:04:06] openhabian@OpenhabianPi:/usr/bin$ java -version
openjdk version “1.8.0_121”
OpenJDK Runtime Environment (Zulu Embedded 8.20.0.42-linux-aarch32hf) (build 1.8.0_121-b42)
OpenJDK Client VM (Zulu Embedded 8.20.0.42-linux-aarch32hf) (build 25.121-b42, mixed mode, Evaluation)

5

Yes it already is Zulu.

You have two paths you can follow. Upgrade to the snapshot (though I would wait a few days, there is a problem with the current snapshot) or use the Milestone 4 release and see if this problem persists in the more recent versions. The problem may be a bug that is already fixed.

Then you will want to start to systematically remove Rules, one at a time until the problem goes away or you have ended up removing all your Rules.

Then you will want to start to systematically removing bindings one at a time until the problem goes away or you have ended up removing all your bindings.

6

Sounds terrible, In this case, I will wait few more days, if this issue keep coming up then I will move to milestone 4.

7

Yes but a pretty old one. Consider upgrading that as well.

8

I will try upgrade Zulu during next system restart,