This is what i get in the debug.
[2018-04-16T20:29:00,267][DEBUG][logstash.pipeline ] Pushing flush onto pipeline {:pipeline_id=>"main", :thread=>"#<Thread:0x578503b6 sleep>"}
[2018-04-16T20:29:00,304][DEBUG][logstash.inputs.http_poller] Fetching URL {:name=>"ePoWebapi", :url=>[:get, "https://xx.xx.xx.xx:8443/remote/core.executeQuery?queryId=855", {:headers=>{"Accept"=>"application/json"}, :auth=>{:user=>"api", :pass=>"Pass", :eager=>true}}]}
[2018-04-16T20:29:00,501][DEBUG][logstash.instrument.periodicpoller.cgroup] Error, cannot retrieve cgroups information {:exception=>"Errno::ENOENT", :message=>"No such file or directory - /sys/fs/cgroup/cpuacct/docker/777382b06c8067aa9a580f9103bae5ec1bae4a4542157608010b9552811c6335/cpuacct.usage"}
[2018-04-16T20:29:00,891][DEBUG][logstash.instrument.periodicpoller.jvm] collector name {:name=>"ParNew"}
[2018-04-16T20:29:00,897][DEBUG][logstash.instrument.periodicpoller.jvm] collector name {:name=>"ConcurrentMarkSweep"}
[2018-04-16T20:29:02,919][DEBUG][logstash.pipeline ] Pushing flush onto pipeline {:pipeline_id=>".monitoring-logstash", :thread=>"#<Thread:0x7583fca2 sleep>"}
[2018-04-16T20:29:05,269][DEBUG][logstash.pipeline ] Pushing flush onto pipeline {:pipeline_id=>"main", :thread=>"#<Thread:0x578503b6 sleep>"}
[2018-04-16T20:29:05,512][DEBUG][logstash.instrument.periodicpoller.cgroup] Error, cannot retrieve cgroups information {:exception=>"Errno::ENOENT", :message=>"No such file or directory - /sys/fs/cgroup/cpuacct/docker/777382b06c8067aa9a580f9103bae5ec1bae4a4542157608010b9552811c6335/cpuacct.usage"}
[2018-04-16T20:29:05,912][DEBUG][logstash.instrument.periodicpoller.jvm] collector name {:name=>"ParNew"}
[2018-04-16T20:29:05,927][DEBUG][logstash.instrument.periodicpoller.jvm] collector name {:name=>"ConcurrentMarkSweep"}
[2018-04-16T20:29:07,930][DEBUG][logstash.pipeline ] Pushing flush onto pipeline {:pipeline_id=>".monitoring-logstash", :thread=>"#<Thread:0x7583fca2 sleep>"}
[2018-04-16T20:29:08,582][DEBUG][logstash.inputs.metrics ] Metrics input: received a new snapshot {:created_at=>2018-04-16 20:29:08 UTC, :snapshot=>#<LogStash::Instrument::Snapshot:0x4b38f652 @metric_store=#<LogStash::Instrument::MetricStore:0x2154bd22 @store=#<Concurrent:
0x00000000000fbc entries=3 default_proc=nil>, @structured_lookup_mutex=#Mutex:0x23894583, @fast_lookup=#<Concurrent:
0x00000000000fc0 entries=84 default_proc=nil>>, @created_at=2018-04-16 20:29:08 UTC>}