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https://issues.apache.org/jira/browse/KAFKA-7300?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Brenden DeLuna reassigned KAFKA-7300:
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Assignee: Brenden DeLuna (was: Philip Nee)
> Add KafkaConsumer fetch-error-rate and fetch-error-total metrics
> -----------------------------------------------------------------
>
> Key: KAFKA-7300
> URL: https://issues.apache.org/jira/browse/KAFKA-7300
> Project: Kafka
> Issue Type: New Feature
> Components: clients, consumer, metrics
> Reporter: Kevin Lu
> Assignee: Brenden DeLuna
> Priority: Minor
>
> [https://cwiki.apache.org/confluence/display/KAFKA/KIP-356%3A+Add+KafkaConsumer+fetch-error-rate+and+fetch-error-total+metrics]
>
> The KafkaConsumer is a complex client that requires many different components
> to function properly. When a consumer is not operating properly, it can be
> difficult to identify the root cause and which component is causing issues
> (ConsumerCoordinator, Fetcher, ConsumerNetworkClient, etc).
>
> This aims to improve the monitoring and detection of KafkaConsumer’s Fetcher
> component.
>
> Fetcher will send a fetch request for each node that the consumer has
> assigned partitions for.
>
> This fetch request may fail under the following cases:
> * Intermittent network issues (goes to onFailure)
> * Node sent an invalid full/incremental fetch response
> (FetchSessionHandler’s handleResponse returns false)
> * FetchSessionIdNotFound
> * InvalidFetchSessionEpochException
>
> These cases are logged, but it would be valuable to provide a corresponding
> metric that allows for monitoring and alerting.
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