Check if OpenHAB is running - Invalid command '' received

Tags: #<Tag:0x00007fd3170abfa8>

(Dries) #1


I have installed OpenHAB2 (Snapshot) using apt-get.
It is running fine.
I wanted to set up a bash-script in Linux that checks regularly if OpenHAB2 is running, and (if not) start it.
I use this script:

if /usr/sbin/service openhab2 status > /dev/null
		echo "Running"
		echo "Stopped, starting openHAB…"
		/usr/sbin/service openhab2 start

The script is running fine. However, every time “/usr/sbin/service openhab2 status” I see an entry in openhab.log:

2017-06-17 13:18:13.460 [WARN ] [ache.karaf.main.ShutdownSocketThread] - Karaf shutdown socket:  Invalid command '' received

It is just a warning, and it seems safe to ignore. But this means my script will pollute my openhab.log. Is there anything wrong with my OH installation? How to solve this warning message?

(Angelos) #2

that’s strange… the service status request shouldn’t interact with the karaf console (i think)
How do you call the bash script?

I tried the same script in my system and I don’t get that warning…
Maybe this is coming from another script/rule/etc?

(Dries) #3

I log in via SSH and type “/usr/sbin/service openhab2 status” (using the root-user)

(Angelos) #4

I tried the same (copied your script) and I don’t get the same
I checked and I have org.apache.karaf on WARN level so I should get that log entry also… (but I don’t)
I am on S951

(Angelos) #5

Correction: The /etc/init.d/openhab2 script does interact with the Karaf (it executes /usr/share/openhab2/runtime/bin/status which in turn, executes: "$KARAF_HOME"/bin/karaf status "$@"

Do you get the same log entry when you run: /usr/share/openhab2/runtime/bin/karaf status ?

update: If I run it manually, I get the same (Karaf shutdown socket: Invalid command '' received)
This means that the script is not executed correctly (for some strange reason)

Note: If I execute systemctl status openhab2 or service openhab2 status, I don’t get that log entry

(Dries) #6

I’m also on S951.

When I run “/usr/share/openhab2/runtime/bin/karaf status”, I get:

root@DiskStation:/# /usr/share/openhab2/runtime/bin/karaf status
/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.utf8)
/usr/share/openhab2/runtime/bin/setenv: line 161: die: command not found
/usr/share/openhab2/runtime/bin/setenv: line 181: [: : integer expression expected
/usr/share/openhab2/runtime/bin/karaf: line 261: [: : integer expression expected
/usr/share/openhab2/runtime/bin/karaf: line 306: [: : integer expression expected
/usr/share/openhab2/runtime/bin/karaf: line 497: /var/packages/java8/target/ejdk1.8.0_121/linux_i586/jre/bin/java: No such file or directory

When running “systemctl status openhab2”, I get:

root@DiskStation:/# systemctl status openhab2
Running in chroot, ignoring request.

When I run “service openhab2 status”, I get:

root@DiskStation:/# service openhab2 status
status: Ignoring predefined value for KARAF_HOME
/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.utf8)
Running ...

And that last command also results in a “[WARN ] [ache.karaf.main.ShutdownSocketThread] - Karaf shutdown socket: Invalid command ‘’ received”

I guess it is related to the fact that I have installed OH under chroot. This is a way to have Debian (and thus apt-get) on my Synology.

[SOLVED] "Failed to start The openHAB 2 Home Automation Bus Solution."
(Jonny) #7

If you get this error, or one like it, it means your java version isn’t set correctly
/usr/share/openhab2/runtime/bin/setenv: line 181: [: : integer expression expected

java -version
To verify it. If it shows nothing, install java. For ubuntu this is:
sudo apt install default-jre default-jdk
If you are using a really new dev version, you’ll need to switch it:
sudo apt update-alternatives --config java
If you haven’t set these variables:
echo $JAVA
Then you need to set them
sudo nano /etc/environment
The correct value of JAVA_HOME is whatever dir has a bin/java in it (the bin dir in it), that is to say:
sudo updatedb && locate bin/java

(Adam Wolarczuk) #8

you all are GODS its all working now thanks so much one last thing is there a way i can get it to start if the computer reboots