[Piuparts-reports] problem with piuparts-slave detected

[piuparts master]

Either a test is running for a very long time (but no test should run longer than an hour), piuparts-slave hangs or is not running at all or wasn't started with ~piupartss/bin/slave_run - please investigate and take appropriate measures!

    main()
  File "../share/piuparts/piuparts-slave", line 666, in main
    processed = section.run()
  File "../share/piuparts/piuparts-slave", line 347, in run
    ret = self._run()
  File "../share/piuparts/piuparts-slave", line 371, in _run
    self._slave.send_log(self._config.section, logdir, fullname)
  File "../share/piuparts/piuparts-slave", line 212, in send_log
    raise MasterNotOK()
__main__.MasterNotOK: ('M', 'a', 's', 't', 'e', 'r', ' ', 'd', 'i', 'd', ' ', 'n', 'o', 't', ' ', 'r', 'e', 's', 'p', 'o', 'n', 'd', ' ', 'w', 'i', 't', 'h', ' ', "'", 'o', 'k', "'")