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https://issues.apache.org/jira/browse/KAFKA-1800?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14230151#comment-14230151
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Guozhang Wang commented on KAFKA-1800:
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It is actually quite important for monitoring topic level error / retry rate
for producer thrown exceptions since many users do not monitor global level
metrics but only on topics that they are interested in.
> KafkaException was not recorded at the per-topic metrics
> --------------------------------------------------------
>
> Key: KAFKA-1800
> URL: https://issues.apache.org/jira/browse/KAFKA-1800
> Project: Kafka
> Issue Type: Bug
> Reporter: Guozhang Wang
> Assignee: Guozhang Wang
> Fix For: 0.9.0
>
> Attachments: KAFKA-1800.patch
>
>
> When KafkaException was thrown from producer.send() call, it is not recorded
> on the per-topic record-error-rate, but only the global error-rate.
> Since users are usually monitoring on the per-topic metrics, loosing all
> dropped message counts at this level that are caused by kafka producer thrown
> exceptions such as BufferExhaustedException could be very dangerous.
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