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https://issues.apache.org/jira/browse/CASSANDRA-6234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13834865#comment-13834865
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Sylvain Lebresne commented on CASSANDRA-6234:
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I don't think the rejection handler can ever be called since MATPE uses an
unbounded queue under the hood. That being said, MATPE does potentially block
tasks by design, but unfortunately I don't think there's a way to know how many
tasks are blocked nor how many were blocked. Might be something to request on
the Netty but for now, let's just use a raw ThreadPoolMetrics and leave blocked
counts (current and total) out of it.
> Add metrics for native protocols
> --------------------------------
>
> Key: CASSANDRA-6234
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6234
> Project: Cassandra
> Issue Type: New Feature
> Reporter: Adam Hattrell
> Assignee: Mikhail Stepura
> Attachments: CASSANDRA-2.0-6234.patch,
> Oracle_Java_Mission_Control_2013-11-22_15-50-09.png
>
>
> It would be very useful to expose metrics related to the native protocol.
> Initially I have a user that would like to be able to monitor the usage of
> native transport threads.
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