[jira] [Assigned] (FLINK-8284) Explicitly mention port conflicts in reporter docs

["Chesnay Schepler (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-8284?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chesnay Schepler reassigned FLINK-8284:
---------------------------------------

    Assignee: Chesnay Schepler

> Explicitly mention port conflicts in reporter docs
> --------------------------------------------------
>
>                 Key: FLINK-8284
>                 URL: https://issues.apache.org/jira/browse/FLINK-8284
>             Project: Flink
>          Issue Type: Improvement
>          Components: Documentation, Metrics
>    Affects Versions: 1.4.0, 1.5.0
>         Environment: Linux/CentOS 7
>            Reporter: Julio Biason
>            Assignee: Chesnay Schepler
>            Priority: Major
>
> Following the documentation, we changed our filter that removes events with missing fields to a RichFilterFunction, so we can capture metrics about such events:
> {code:scala}
> public class MissingClientFilter extends RichFilterFunction<LineData> {
> 	private transient Counter counter;
> 	@Override
> 	public void open(Configuration config) {
> 		this.counter = getRuntimeContext()
> 			.getMetricGroup()
> 			.addGroup("events")
> 			.counter("missingClient");
> 	}
> 	@Override
> 	public boolean filter(LineData line) {
> 		String client = line.get("client").toString();
> 		boolean missing = client.trim().equals("");
> 		if (!missing) {
> 			this.count();
> 		}
> 		return !missing;
> 	}
> 	private void count() {
> 		if (this.counter != null) {
> 			this.counter.inc();
> 		}
> 	}
> }
> {code}
> We also added Prometheus as our reporter:
> {noformat}
> metrics.reporters: prom
> metrics.reporter.prom.port: 9105
> metrics.reporter.prom.class: org.apache.flink.metrics.prometheus.PrometheusReporter
> {noformat}
> The problem is accessing port 9105 display all Flink metrics, but not ours.



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