[jira] [Created] (KAFKA-13797) Adding metric to indicate metadata response outgoing bytes rate

["Lucas Wang (Jira)" <ji...@apache.org>]

Lucas Wang created KAFKA-13797:
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             Summary: Adding metric to indicate metadata response outgoing bytes rate
                 Key: KAFKA-13797
                 URL: https://issues.apache.org/jira/browse/KAFKA-13797
             Project: Kafka
          Issue Type: Improvement
            Reporter: Lucas Wang


It's not a common case, but we experienced the following problem in one of our clusters.

The use case involves dynamically creating and deleting topics in the cluster, and the clients were constantly checking if a topic exists in a cluster using the special type of Metadata requests whose topics field is null in order to retrieve all topics before checking a topic's existence.

A high rate of such Metadata requests generated a heavy load on brokers in the cluster. 

Yet, currently, there is no metric to indicate the metadata response outgoing bytes rate.

We propose to add such a metric in order to make the troubleshooting of such cases easier.



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