[jira] [Created] (KAFKA-19504) AdminClient creates and adds second metrics reporter

["Bill Bejeck (Jira)" <ji...@apache.org>]

Bill Bejeck created KAFKA-19504:
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             Summary: AdminClient creates and adds second metrics reporter 
                 Key: KAFKA-19504
                 URL: https://issues.apache.org/jira/browse/KAFKA-19504
             Project: Kafka
          Issue Type: Task
          Components: clients
    Affects Versions: 4.1.0
            Reporter: Bill Bejeck


The `AdminClient` adds a telemetry reporter to the metrics reporters list in the constructor.  The problem is that the reporter was already added in the `createInternal` method.  In the `createInternal` method call, the `clientTelemetryReporter` is added to a `List<MetricReporters>` which is passed to the `Metrics` object, will get closed when `Metrics.close()` is called.  But adding a reporter to the reporters list in the constructor is not used by the `Metrics` object and hence doesn't get closed, causing a memory leak.  Note, this problem only exists if telemetry metrics is enabled for the `AdminClient` and it is disabled by default.



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