ParseError

[akrzos]

I have now seen this occur "randomly". If I find any further details on how this occurs I'll post back to this issue.

[2017-06-27 17:13:39] [error] Unhandled python exception in read callback: ParseError: Unknown input format: ''
[2017-06-27 17:13:39] [error] Traceback (most recent call last):
[2017-06-27 17:13:39] [error]   File "/usr/local/bin/collectd_iostat_python.py", line 328, in read_callback
    ds = iostat.get_diskstats()
[2017-06-27 17:13:39] [error]   File "/usr/local/bin/collectd_iostat_python.py", line 184, in get_diskstats
    eds = self.parse_diskstats(edd)
[2017-06-27 17:13:39] [error]   File "/usr/local/bin/collectd_iostat_python.py", line 101, in parse_diskstats
    raise ParseError('Unknown input format: %r' % input)
[2017-06-27 17:13:39] [error] ParseError: Unknown input format: ''

Also this one:

[2017-06-26 19:11:41] [error]   File "/usr/local/bin/collectd_iostat_python.py", line 328, in read_callback
    ds = iostat.get_diskstats()
[2017-06-26 19:11:41] [error]   File "/usr/local/bin/collectd_iostat_python.py", line 181, in get_diskstats
    dsd = self._get_childs_data(dstats)
[2017-06-26 19:11:41] [error]   File "/usr/local/bin/collectd_iostat_python.py", line 157, in _get_childs_data
    (stdout, stderr) = child.communicate()
[2017-06-26 19:11:41] [error]   File "/usr/lib64/python2.7/subprocess.py", line 793, in communicate
    self.stdout.close()
[2017-06-26 19:11:41] [error] IOError: [Errno 9] Bad file descriptor

[deniszh]

Looks like sometimes running of 'iostat' command on your machine returns error or some garbage. What's your OS and Interval / Count parameters?

[akrzos]

What's your OS and Interval / Count parameters?

RHEL 7.3

Collectd interval (global and plugin) of 10s with iostat interval of 2s

Example of my configuration for the iostat plugin:

<Plugin python>
  ModulePath "/usr/local/bin/"
  Import "collectd_iostat_python"

  <Module collectd_iostat_python>
    Path "/usr/bin/iostat"
    Interval 10
    IostatInterval 2
    Count 2
    Verbose false
    NiceNames false
    PluginName collectd_iostat_python
  </Module>
</Plugin>