check_ceph_status raised exception

[Adam Dyess]

    check_ceph_status raised unknown exception '<class 'json.decoder.JSONDecodeError'>'
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Traceback (most recent call last):
File "/usr/local/lib/nagios/plugins/check_ceph_status.py", line 294, in main
msg = check_ceph_status(args)
File "/usr/local/lib/nagios/plugins/check_ceph_status.py", line 142, in check_ceph_status
status_data = json.loads(tree)
File "/usr/lib/python3.6/json/__init__.py", line 354, in loads
return _default_decoder.decode(s)
File "/usr/lib/python3.6/json/decoder.py", line 339, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/usr/lib/python3.6/json/decoder.py", line 357, in raw_decode
raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
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[Adam Dyess (addyess)]

content of /var/lib/nagios/cat-ceph-status.txt is empty

[Adam Dyess (addyess)]

running `sudo ceph status` on this node times out eventually because it's split off from the rest of the network -- it may be best to produce 'CRITICAL: cannot read ceph status' or something like that.