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https://issues.apache.org/jira/browse/AMBARI-18331?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15478729#comment-15478729
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Hudson commented on AMBARI-18331:
---------------------------------
FAILURE: Integrated in Jenkins build Ambari-branch-2.5 #12 (See
[https://builds.apache.org/job/Ambari-branch-2.5/12/])
AMBARI-18331 - JMX metric retrieval method may unnecessarily refresh (jhurley:
[http://git-wip-us.apache.org/repos/asf?p=ambari.git&a=commit&h=4ea3229df1c16c47ad42aa5eb298698787c33ab4])
* (edit)
ambari-server/src/main/java/org/apache/ambari/server/state/services/MetricsRetrievalService.java
* (edit) ambari-server/docs/configuration/index.md
* (edit)
ambari-server/src/test/java/org/apache/ambari/server/controller/metrics/RestMetricsPropertyProviderTest.java
* (edit)
ambari-server/src/test/java/org/apache/ambari/server/controller/metrics/JMXPropertyProviderTest.java
* (edit)
ambari-server/src/main/java/org/apache/ambari/server/controller/metrics/RestMetricsPropertyProvider.java
* (edit)
ambari-server/src/main/java/org/apache/ambari/server/controller/jmx/JMXPropertyProvider.java
* (add)
ambari-server/src/test/java/org/apache/ambari/server/state/services/MetricsRetrievalServiceTest.java
* (edit)
ambari-server/src/main/java/org/apache/ambari/server/configuration/Configuration.java
AMBARI-18331 - JMX metric retrieval method may unnecessarily refresh (jhurley:
[http://git-wip-us.apache.org/repos/asf?p=ambari.git&a=commit&h=94a3f90f4097ff3934591e22c5d63556b04fbf0f])
* (edit)
ambari-server/src/main/java/org/apache/ambari/server/state/services/MetricsRetrievalService.java
> 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
>
> Attachments: AMBARI-18331.patch
>
>
> 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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