Taming openHAB 2 Logging

Took your advice and split it out into it’s own post. Since I had such a hard time finding the information originally (and after updating with OH2.2 replacing the config file) I don’t doubt you’re right it’s something a lot of people ask for.

New topic is at : OpenHAB - Filtering event logs

It’s pretty straightforward as configuration goes, and hopefully adding the filtering reference to the topic name should help people find it readily enough.



Side hint: If you change you logging conf and the change does not seem to work, check if the lines you changed have trailing whitespaces ! It took me several hours to figure that out - so I like to save that time to you … :smiley:

1 Like

log4j also seems to privide a CronTriggeringPolicy in order to rotate the log. For example rotating at midnight.

Did someone already manage to implement that? I tried but failed because all examples found in the internet use xml and not this openhabs approach.

I was asking something similar here:

Unfortunately official documentation is for the xml file which was discontinued with OH2.
I am not sure why and nobody answered me. Maybe beacuse things would be too easy, then! :wink:

Do these instructions still apply to the current release? Is there anything different if running on Windows as a Windows Service?

The OP is out of date. See some of the later posts in the thread or Log4j2 Sample Config.

There is nothing different with the configs when running on Windows.

1 Like

What exactly do you mean?

The log4j config file is identical when running on all platforms. One does not need to do anything special to make logging work when running on Windows as a service.

I totally broke all openhab logging after I edited the org.ops4j.pax.logging.cfg file. Now nothing is logging at all. I replaced the text of the file with what I found in the org.ops4j.pax.logging.cfg.dpkg-old file but no luck.

I’ve restarted it several times, used the openhabian config tool to install openhabian 2.2 (I believe I was running 2.3 snapshot) because I was under the impression that would reset everything in /var/lib/openhab2 and there for fix it but still no luck.

here is the file as it sits now

# Root logger
log4j.rootLogger = WARN, out, osgi:*

# openHAB specific logger configuration
log4j.logger.smarthome.event = INFO, event, osgi:*
log4j.logger.smarthome.event.ItemStateEvent = ERROR
log4j.logger.smarthome.event.ItemAddedEvent = ERROR
log4j.logger.smarthome.event.ItemRemovedEvent = ERROR
log4j.logger.smarthome.event.ThingStatusInfoEvent = ERROR
log4j.logger.smarthome.event.InboxUpdatedEvent = ERROR
log4j.additivity.smarthome.event = false

log4j.logger.org.openhab = INFO
log4j.logger.org.eclipse.smarthome = INFO
log4j.logger.org.jupnp = ERROR
log4j.logger.javax.jmdns = ERROR
log4j.logger.org.ops4j.pax.web.service.jetty.internal.JettyServerWrapper = ERROR
log4j.logger.org.apache.karaf.kar.internal.KarServiceImpl = ERROR
log4j.logger.org.apache.aries.spifly = ERROR

# CONSOLE appender not used by default
log4j.appender.stdout.layout.ConversionPattern=%d{HH:mm:ss.SSS} [%-5.5p] [%-36.36c] - %m%n

# File appender - openhab.log
log4j.appender.out.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss.SSS} [%-5.5p] [%-36.36c] - %m%n

# File appender - events.log
log4j.appender.event.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss.SSS} [%-26.26c{1}] - %m%n

# Sift appender
log4j.appender.sift.appender.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss.SSS} [%-5.5p] [%-36.36c] - %m%n

Anyone have any pointers?

That is not the content of the original file. Grab it from here and copy it to your file.

1 Like

Sure enough, that did it. I could have sworn I tried that in my attempts to fix it. Thanks.

Does anyone have any Idea how to get TimeBasedTriggering working?

I replied with my ideas on your original thread. I must have missed it when you first posted.

How do I clear the openhab.log file (not the console log which is explained in the documentation)?
Mine got to 15MB in size during the last install.

rm openhab.log

You just delete it (stop openhab of course before deleting it).

Be aware that it will roll over on its own when the file reaches 16 MB.

Thank you for the reply.

Do I enter

rm openhab.log

That doesn’t work. Or, do I delete the contents of the file manually (or the file)?

Delete the file. But not while OH is running.

But what I was hoping to get across without saying it is:

  • 15 MB is nothing to worry about
  • OH will move the file to openhab.log.1 when the file reaches 16 MB on its own and after it reaches the 9 it will automatically delete the old log files
  • in short, you shouldn’t be worrying about your log files, particularly if you do not have enough experience to be asking these questions in the first place.

I guess I should be looking at console logging for debugging stuff that isn’t working so I’ll leave it alone.

But conversely there are a hell of a lot of posts on here where people are discussing all manner of ways of reducing SD card and USB drive writes to stop corruption including stopping logging all together or logging to an external file server et al.