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https://issues.apache.org/jira/browse/OAK-2755?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14492686#comment-14492686
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Varun Mehrotra commented on OAK-2755:
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Thanks [~chetanm] This looks like a really great insight into the various
listeners and their performance. If we could get this feature in oak 1.0.13, it
would be great. Are there plans around it? It would be a great info to look
around when intensive tasks in the system are being performed and how many
local/external events are generated and how is the queue performing.
> Consolidated JMX view of all EventListener related statistics
> -------------------------------------------------------------
>
> Key: OAK-2755
> URL: https://issues.apache.org/jira/browse/OAK-2755
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: core
> Reporter: Chetan Mehrotra
> Assignee: Chetan Mehrotra
> Labels: monitoring, observation
> Fix For: 1.0.13, 1.3.0
>
> Attachments: OAK-2755-2.patch, OAK-2755.patch,
> consolidated-listener-stats-2.png, consolidated-listener-stats.png
>
>
> Oak Observation support exposes a {{EventListenerMBean}} [1] which provide
> quite a bit of details around registered observation listeners. However in a
> typical application there would be multiple listeners registered. To simplify
> monitoring it would be helpful to have a _consolidated_ view of all listeners
> related statistics.
> Further the stats can also include some more details which are Oak specific
> * Subtree paths to which the listener listens to - By default JCR Api allows
> single path however Oak allows a listener to register to multiple paths
> * If listener is enabled to listen to cluster local and cluster external
> changes
> * Size of queue in BackgroundObserver
> * Distribution of change types present in the queue - Local, External etc
> [1]
> https://github.com/apache/jackrabbit/blob/trunk/jackrabbit-api/src/main/java/org/apache/jackrabbit/api/jmx/EventListenerMBean.java
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