Error after error in openhab.log

it could be anything…

what bindings are you using? on which OH2 version?

when does this error occur?

jetty + I/O error = could be something related to a timeout / network connectivity issue with a remote (http) client

see also:

  1. An I/O error has occurred while writing a response message entity to the container output stream
  2. I/O error while writing a response message entity to the container output stream · Issue #587 · openhab/openhab-distro · GitHub