Sylvain Le Gouellec created KAFKA-13647:
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Summary: RocksDb metrics 'number-open-files' is not correct
Key: KAFKA-13647
URL: https://issues.apache.org/jira/browse/KAFKA-13647
Project: Kafka
Issue Type: Bug
Components: streams
Affects Versions: 3.0.0
Reporter: Sylvain Le Gouellec
We were looking at RocksDB metrics and noticed that the {{number-open-files}}
metric behaves like a counter, rather than a gauge.
Looking at the code, we think there is a small error in the type of metric for
that specific mbean (should be a value metric rather than a sum metric).
See [
https://github.com/apache/kafka/blob/ca5d6f9229c170beb23809159113037f05a1120f/streams/src/main/java/org/apache/kafka/streams/state/internals/metrics/RocksDBMetrics.java#L482|https://github.com/apache/kafka/blob/99b9b3e84f4e98c3f07714e1de6a139a004cbc5b/streams/src/main/java/org/apache/kafka/streams/state/internals/metrics/RocksDBMetrics.java#L482]
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