Openhab crashes: sometimes multiple times a day, sometimes once a week

1

Anyhow, not sure where I should post this so if it’s in the wrong spot, I’dd appreciate someone correcting me.

So, about 2 months ago I Migrated my OH setup to a rpi2. Before I did this I didn’t have any issues with openhab crashing, now almost daily, but most days it will crash multiple times, other times it will run for a week or so without crashing.
this is what the terminal says:

A fatal error has been detected by the Java Runtime Environment:

SIGSEGV (0xb) at pc=0x7655a07c, pid=3404, tid=1946682480

JRE version: Java™ SE Runtime Environment (8.0-b132) (build 1.8.0-b132)

Java VM: Java HotSpot™ Client VM (25.0-b70 mixed mode linux-arm )

Problematic frame:

V [libjvm.so+0x16507c] CounterDecay::do_method(Method*)+0x14

Failed to write core dump. Core dumps have been disabled. To enable core dumping, try “ulimit -c unlimited” before starting Java again

An error report file with more information is saved as:

/opt/openhab/hs_err_pid3404.log

If you would like to submit a bug report, please visit:

http://bugreport.sun.com/bugreport/crash.jsp

Aborted
./start.sh: 34: ./start.sh: -Djava.compiler=NONE: not found
./start.sh: 35: ./start.sh: -Xrunjdwp:transport=dt_socket,address=8001,server=y,suspend=n: not found

Any help would be very much appreciated

2

This used to happen to me every couple of days.

Whilst I have little solid evidence to prove that this is a solution, I made the recommended changes regarding the tmpfs and reduced the overclock on my RPi2 and it’s been solid ever since.

1 Like
3

I recommend installing the Oracle JDK 1.8, do not overclock, and use the apt-get method of installing openHAB and the addons.

4

I don’t understand, the “do not overclock” part, in raspi-config the max overclock setting is rpi2 1000mhz, isn’t this the correct setting for a pie 2?

and another followup question, if I install the oracle JDK will I need to remove the previous jdk?
and can you point me to a guide of doing so?

5

Thank You for your advice, I modified my tmpfs file, I left the overclock setting at rpi2 because it’s a pie 2, hopefully this works, only time will tell. but Thank you very much for you efforts.

6

The Raspberry Pi 2’s default clock speed is 900MHz. This link might have the full answer.

You don’t need to worry about the other JDK; it can stay in place.

sudo apt-get install oracle-java8-jdk

Just verify after the above the you are using the Oracle JDK with java -version.

7

it seems I already have oracle installed but I’m not sure the version looks correct, does this look good?

pi@RPI-BACKEND /opt/openhab $ sudo apt-get install oracle-java8-jdk
Reading package lists… Done
Building dependency tree
Reading state information… Done
oracle-java8-jdk is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 46 not upgraded.
pi@RPI-BACKEND /opt/openhab $ java -version
java version “1.8.0”
Java™ SE Runtime Environment (build 1.8.0-b132)
Java HotSpot™ Client VM (build 25.0-b70, mixed mode)
pi@RPI-BACKEND /opt/openhab $

8

Looks correct. My Java on RPi2:

$ java -version
java version "1.8.0"
Java(TM) SE Runtime Environment (build 1.8.0-b132)
Java HotSpot(TM) Client VM (build 25.0-b70, mixed mode)

Odd things can happen if you’re not at the standard clock settings. Possibly other causes for crashing, too. FTR, I never see JVM crashes on my RPi2 setups with openHAB.

9

OK, thank you very much for your help, I will clock it back to standard specs. It seems like it’s been solid since I modified my tempfs file, but I probably don’t really need the extra 100mhz rather be safe. Thanks again for your help

1 Like
10

Thank you for all the help guys, My pie has been stable for 2 days straight now

1 Like
11

Glad to help!