OH2.1 and Harmonyhub

I can reproduce your issue as follows:

  1. Edit and save Harmony Hub configuration
  2. Send pressButton command

Most likely the issue is that when the configuration is changed the buttonExecutor threadpool is stopped (in dispose()) but never restarted (in initialize()). WDYT @digitaldan?

So a workaround that will probably work for now is:

  1. Edit and save Harmony Hub configuration
  2. Restart openHAB
  3. Send pressButton commands all you like
  4. If for some reason you again want to edit/update the Harmony Hub configuration again restart openHAB after it
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