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https://issues.apache.org/jira/browse/FLUME-2562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14221243#comment-14221243
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Gwen Shapira commented on FLUME-2562:
-------------------------------------
Looks like I got the wrong counters here :)
I used CounterGroup where I probably should have used SourceCounter,
SinkCounter and ChannelCounter which are exposed via http.
I assume that extending those classes to add some Kafka-specific metrics is
acceptable?
I'm asking because it looks like no one extended them before...
> Metrics for Flafka components
> -----------------------------
>
> Key: FLUME-2562
> URL: https://issues.apache.org/jira/browse/FLUME-2562
> Project: Flume
> Issue Type: Improvement
> Reporter: Gwen Shapira
> Assignee: Gwen Shapira
> Attachments: FLUME-2562.0.patch
>
>
> Kafka source, sink and channel should have metrics. This will help us track
> down possible issues or performance problems.
> Here are the metrics I came up with:
> kafka.next.time - Time spent waiting for events from Kafka (source and
> channel)
> kafka.send.time - Time spent sending events (channel and sink)
> kafka.commit.time - Time spent committing (source and channel)
> events.sent - Number of events sent to Kafka (sink and channel)
> events.read - Number of events read from Kafka (channel and source)
> events.rollback - Number of event rolled back (channel) or number of rollback
> calls (sink)
> kafka.empty - Number of times backing off due to empty kafka topic (source)
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