[jira] [Created] (KAFKA-13147) connection-close-total Metric Keeps Incrementing While Broker Down

["Gary Russell (Jira)" <ji...@apache.org>]

Gary Russell created KAFKA-13147:
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             Summary: connection-close-total Metric Keeps Incrementing While Broker Down
                 Key: KAFKA-13147
                 URL: https://issues.apache.org/jira/browse/KAFKA-13147
             Project: Kafka
          Issue Type: Bug
          Components: clients
    Affects Versions: 2.8.0
            Reporter: Gary Russell


When the broker is down, the {code}connection-close-total{code} keeps incrementing with each connection event.

This makes it more difficult to determine connection health.

{code:java}
System.out.println("Open count:  " + metrics.entrySet().stream()
		.filter(entry -> entry.getKey().name().equals("connection-creation-total"))
		.map(entry -> entry.getValue().metricValue())
		.collect(Collectors.toList()));
System.out.println("Close count: " + metrics.entrySet().stream()
	.filter(entry -> entry.getKey().name().equals("connection-close-total"))
	.map(entry -> entry.getValue().metricValue())
	.collect(Collectors.toList()));
{code}

{noformat}
Open count:  [1.0]
Close count: [0.0]
Open count:  [3.0]
Close count: [0.0]
Open count:  [3.0]
Close count: [8.0]
Open count:  [3.0]
Close count: [13.0]
Open count:  [3.0]
Close count: [17.0]
Open count:  [3.0]
Close count: [22.0]
{noformat}

It would also be more useful if metrics for connection counts by node were available.



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