Worker end of action - unicode exception

[mohierf]

[2019-01-07 06:39:09] INFO: [poller-master.alignak.daemon] Daemon poller-master is living: loop #1 ;)
[2019-01-07 06:43:54] ERROR: [poller-master.alignak.worker.fork_1] [fork_1] exited with an unmanaged exception : 'utf8' codec can't decode byte 0x90 in position 14: invalid start byte
[2019-01-07 06:43:54] ERROR: [poller-master.alignak.worker.fork_1] 'utf8' codec can't decode byte 0x90 in position 14: invalid start byte
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/alignak-2.0.3-py2.7.egg/alignak/worker.py", line 374, in work
    self.do_work(actions_queue, returns_queue, control_queue)
  File "/usr/local/lib/python2.7/dist-packages/alignak-2.0.3-py2.7.egg/alignak/worker.py", line 420, in do_work
    self.manage_finished_checks(returns_queue)
  File "/usr/local/lib/python2.7/dist-packages/alignak-2.0.3-py2.7.egg/alignak/worker.py", line 320, in manage_finished_checks
    action.check_finished(self.max_plugins_output_length)
  File "/usr/local/lib/python2.7/dist-packages/alignak-2.0.3-py2.7.egg/alignak/action.py", line 437, in check_finished
    self.stderrdata += stderr.decode("utf-8")
  File "/usr/lib/python2.7/encodings/utf_8.py", line 16, in decode
    return codecs.utf_8_decode(input, errors, True)
UnicodeDecodeError: 'utf8' codec can't decode byte 0x90 in position 14: invalid start byte
[2019-01-07 06:43:55] WARNING: [poller-master.alignak.satellite] The worker fork_1 (pid=28712) went down unexpectedly!
[2019-01-07 06:43:55] INFO: [poller-master.alignak.satellite] Allocating new 'fork' worker...
[2019-01-07 06:43:55] INFO: [poller-master.alignak.satellite] Started 'fork' worker: fork_4 (pid=29623)
[2019-01-07 06:43:55] INFO: [poller-master.alignak.worker.fork_4] [fork_4] (pid=29623) starting my job...
[2019-01-07 06:43:55] WARNING: [poller-master.alignak.action] Process pid=29491 spent too much time: 60.34 seconds
[2019-01-07 06:43:59] WARNING: [poller-master.alignak.action] Process pid=29509 spent too much time: 60.07 seconds
[2019-01-07 06:44:00] WARNING: [poller-master.alignak.action] Process pid=29516 spent too much time: 60.01 seconds
[2019-01-07 06:44:00] ERROR: [poller-master.alignak.worker.fork_3] [fork_3] exited with an unmanaged exception : 'utf8' codec can't decode byte 0x8e in position 16: invalid start byte
[2019-01-07 06:44:00] ERROR: [poller-master.alignak.worker.fork_3] 'utf8' codec can't decode byte 0x8e in position 16: invalid start byte
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/alignak-2.0.3-py2.7.egg/alignak/worker.py", line 374, in work
    self.do_work(actions_queue, returns_queue, control_queue)
  File "/usr/local/lib/python2.7/dist-packages/alignak-2.0.3-py2.7.egg/alignak/worker.py", line 420, in do_work
    self.manage_finished_checks(returns_queue)
  File "/usr/local/lib/python2.7/dist-packages/alignak-2.0.3-py2.7.egg/alignak/worker.py", line 320, in manage_finished_checks
    action.check_finished(self.max_plugins_output_length)
  File "/usr/local/lib/python2.7/dist-packages/alignak-2.0.3-py2.7.egg/alignak/action.py", line 437, in check_finished
    self.stderrdata += stderr.decode("utf-8")
  File "/usr/lib/python2.7/encodings/utf_8.py", line 16, in decode
    return codecs.utf_8_decode(input, errors, True)
UnicodeDecodeError: 'utf8' codec can't decode byte 0x8e in position 16: invalid start byte
[2019-01-07 06:44:01] WARNING: [poller-master.alignak.satellite] The worker fork_3 (pid=28714) went down unexpectedly!
[2019-01-07 06:44:01] INFO: [poller-master.alignak.satellite] Allocating new 'fork' worker...
[2019-01-07 06:44:01] INFO: [poller-master.alignak.satellite] Started 'fork' worker: fork_5 (pid=29644)
[2019-01-07 06:44:01] INFO: [poller-master.alignak.worker.fork_5] [fork_5] (pid=29644) starting my job...
[2019-01-07 06:44:03] WARNING: [poller-master.alignak.action] Process pid=29522 spent too much time: 60.52 seconds
[2019-01-07 06:44:27] WARNING: [poller-master.alignak.action] Process pid=29584 spent too much time: 60.39 seconds