Collectd CPU plugin showing error 'Invalid value for type disk_io_time'

[Sachin Sable]

I am have recently started working with collectd, I am using logstash to collect logs from collectd. I am seeing following error, anyone know how to fix it?

{:timestamp=>"2016-07-15T21:03:53.481000+0000", :message=>"Invalid value for type=\"disk_io_time\", key=nil, index=1", :level=>:error}

{:timestamp=>"2016-07-15T21:03:53.482000+0000", :message=>"Invalid value for type=\"disk_io_time\", key=nil, index=0", :level=>:error}

{:timestamp=>"2016-07-15T21:03:53.482000+0000", :message=>"Invalid value for type=\"disk_io_time\", key=nil, index=1", :level=>:error}

{:timestamp=>"2016-07-15T21:03:53.483000+0000", :message=>"Invalid value for type=\"disk_io_time\", key=nil, index=0", :level=>:error}

{:timestamp=>"2016-07-15T21:03:53.484000+0000", :message=>"Invalid value for type=\"disk_io_time\", key=nil, index=1", :level=>:error}