I started examining metrics on one of the nodes in my Kafka cluster and I am confused about one of the metrics that is exposed. Specifically, this metric: kafka.network:name=ErrorsPerSec,error=NONE,request=Fetch,type=RequestMetrics
The name is ErrorsPerSec but error is set to "NONE". What is the correct interpretation of what this metric represents? Are these errors (as the name implies) or are they not errors (as the value of error implies)? If they are errors, my next question is how I can uncover what is causing the error. I don't see anything relevant in the Kafka logs. Here is how I am accessing the metric: bin/kafka-run-class.sh kafka.tools.JmxTool --jmx-url service:jmx:rmi:///jndi/rmi://localhost:9999/jmxrmi --object-name kafka.network:name=ErrorsPerSec,error=NONE,request=Fetch,type=RequestMetrics --attributes Count "time","kafka.network:type=RequestMetrics,name=ErrorsPerSec,request=Fetch,error=NONE:Count" 1559694405057,684396 1559694407058,684396 1559694409058,684400 1559694411059,684400 1559694413061,684404 1559694415059,684404 1559694417059,684404 1559694419068,684408 1559694421060,684408 1559694423061,684412
