@Tobi77, what kind of system do you run OH2 on?
Maybe this is only a problem on certain platforms?
Will try to enable DEBUG/TRACE level debug for binding.
Only about 2 in 10 restarts goes without a hiccup.
Raspberry Pi 3B Plus, milestone…
I had the impression that snapshot builds are more stable regarding the Tradfri binding, but much more unstable for others…
I’ve been on snapshots from day one and the problem has been there since last winter.
I see the same behaviour on two sites, both running Ubuntu server on intel x64 CPU.
Hmmm. Do we have know the maintainers of the binding? Or is this an ESH business?
Note, the ESH bug report claims this to be resolved since ESH 0.10, which is already running in OH 2.4.
Still, the issue remains…
I created a bug report here:
I hope this is the expected procedure. Please inform me in case a acting wrong.
2.5.0-SNAPSHOT Build #1482
My Trådfri Gateway lost all its pairings yesterday, possibly because I had to re-boot/power-cycle it in order to get it to connect to OH2. I had problems re-pairing lights and opted to replace it with a spare I had.
This new Gateway has the same issue with failing to connect after an OH2 restart.
I tried enabling more logs, but no more is showing.
openhab> log:set DEBUG org.openhab.binding.tradfri
When restarting the binding, this is the only WARN log:
2018-12-30 15:31:44.086 [WARN ] [iscovery.TradfriDiscoveryParticipant] - Discovered Tradfri gateway doesn't have an IP address: [ServiceInfoImpl@1501157832 name: 'gw-b072bfb31baf._coap._udp.local.' address: '(null):5684' status: 'NO DNS state: probing 1 task: null', has NO data, empty]
Same log entry on both success and failure.
Tradfri gateway doesn't have an IP address
That’s exactly what I am also experiencing…
Here https://github.com/eclipse/smarthome/issues/6065#issuecomment-453748486 a fix ist proposed and the author asks for testing. As I am unexperienced in conpliling ESH: Maybe an advanced user can do a test and confirm, so the new code can be merged? Thanks 
@OMR: Can you give a try?
I don’t have a Java build environment, but I’m familiar with testing jars should one emerge.
@hreichert uploaded a test version here: https://cloud.h0lger.de/index.php/s/lyKNjOhEKarsGak
Download all files;Remove Tradfri binding; Drop all files in your “addons” folder; Restart.
I recommend to do this on a testing environment.
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I’m on it, but a bit pressed for time.
Let you know.
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Since I don’t have a testing environment setup and am receiving house-guest this weekend it will have to wait until next week.
@cweitkamp, I see you updated the JARs just yesterday.
Have you tested them at all?
If they still work OK for you, would it be easier to test in the next SNAPSHOT?
@OMR There seems to be a misunderstanding. I did not upload anything. I just posted a link to a test version uploaded by @hreichert. So, No, I did not test it, but I am sure @hreichert did.
Just added the change to my system and did a powercycle of the Ikea GW - came back just fine in OpenHab so for now it’s a better working solution than the old binding code for me. Will keep it running and reply back with any other findings I might see with this code.
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Will the provided JAR files work in OH2.5 M1, or are they prepared for OH2.4?
Yes, It should work.
Would you need additional testing before you publish this, or is the improved code already pulled and on the way to snapshot?
Testing will be always welcome. But we have to wait for a release of the underlying library before we can integrate it. If you like to follow the current state I recommend you to subscribe to the related issue.