Qichao Chu created KAFKA-16127:
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Summary: Reset corresponding verbosity configs when topic is
deleted
Key: KAFKA-16127
URL: https://issues.apache.org/jira/browse/KAFKA-16127
Project: Kafka
Issue Type: Task
Reporter: Qichao Chu
*{{metrics.verbosity}}* will be a new dynamic config introduced to control the
verbosity(fan-out rate) of the metrics. It's a config with JSON format
specifying the condition controlling fan-out of the metrics.
When the topic is deleted, the corresponding topic config should be reset to
default value because:
# If the topic is automatically recreated, the verbosity from the previous
generation may cause too much/too little metrics to be emitted
# Too many unused configurations may cause user error when configuring this
field. The typical workflow would be getting the value first, then adding or
modifying the config to reflect the latest requirement. If we don't delete
unused entries, it could only grow instead of evolve.
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