logstash: Error, cannot retrieve cgroups information

问题

I'm trying to run logstash using specific config file:

$ /usr/share/logstash/bin/logstash --debug -f $HOME/conf.d/conf2.conf --path.settings /etc/logstash

and I'm getting this error:

[2018-06-26T15:00:41,046][DEBUG][logstash.pipeline        ] Pushing flush onto pipeline {:pipeline_id=>"main", :thread=>"#<Thread:0x6556cab@/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:247 sleep>"}
[2018-06-26T15:00:45,417][DEBUG][logstash.instrument.periodicpoller.jvm] collector name {:name=>"ParNew"}
[2018-06-26T15:00:45,418][DEBUG][logstash.instrument.periodicpoller.jvm] collector name {:name=>"ConcurrentMarkSweep"}
[2018-06-26T15:00:45,419][DEBUG][logstash.instrument.periodicpoller.cgroup] Error, cannot retrieve cgroups information {:exception=>"NoMethodError", :message=>"undefined method `[]' for nil:NilClass"}

have you any idea about this?

回答1:

This error message appears then MySQL is unreachable

来源：https://stackoverflow.com/questions/51077871/logstash-error-cannot-retrieve-cgroups-information