Jonathan Hurley created AMBARI-18331:
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Summary: JMX metric retrieval method may unnecessarily refresh
metrics at a high rate
Key: AMBARI-18331
URL: https://issues.apache.org/jira/browse/AMBARI-18331
Project: Ambari
Issue Type: Task
Components: ambari-server
Affects Versions: 2.4.0
Reporter: Jonathan Hurley
Assignee: Jonathan Hurley
Fix For: trunk
In AMBARI-16913 we revised the JMX retrieval method to maintain an internal
state of JMX metrics, with the retrieval taking place out of band of the actual
jetty query requiring the metric. However, each query will still generate a
refresh request to the metric, regardless of it's current state.
Recommend setting a TTL on a given metric such as 5 seconds, and only generate
a new request for the metric if a TTL has expired, to avoid large amounts of
repeat metrics collections in short windows.
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