Problem with ThingManager and ThreadPool

With the recent build of OpenHab2 I get the following warnings in my Tellstick binding.

2016-02-09 22:43:13.149 [WARN ] [rthome.core.common.ThreadPoolManager] - Thread pool ‘thingManager’ rejected execution of class org.eclipse.smarthome.core.thing.internal.ThingManager$8

This seems related to the amount of devices I have added, when I only have 5-10 things defined it works, but when I have added all 20 things it stops working.
bridgeHandlerInitialized does never get called on some of my ThingHandlers and it seems to be related to the error above.
Any hints on how to resolve this ?

Have a try by increasing this value in your configuration:

In the end, this worked for me.

Thanks for the feedback. I hope that such manual setting won’t be necessary anymore, once we have finished and with it a new thread pool handling.