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Posted to jira@kafka.apache.org by "John Roesler (JIRA)" <ji...@apache.org> on 2018/04/27 23:59:00 UTC
[jira] [Closed] (KAFKA-6376) Improve Streams metrics for skipped
records
[ https://issues.apache.org/jira/browse/KAFKA-6376?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
John Roesler closed KAFKA-6376.
-------------------------------
All the work for this issue is merged in the linked GH PRs.
> Improve Streams metrics for skipped records
> -------------------------------------------
>
> Key: KAFKA-6376
> URL: https://issues.apache.org/jira/browse/KAFKA-6376
> Project: Kafka
> Issue Type: Improvement
> Components: metrics, streams
> Affects Versions: 1.0.0
> Reporter: Matthias J. Sax
> Assignee: John Roesler
> Priority: Major
> Labels: kip
> Fix For: 2.0.0
>
>
> Copy this from KIP-210 discussion thread:
> {quote}
> Note that currently we have two metrics for `skipped-records` on different
> levels:
> 1) on the highest level, the thread-level, we have a `skipped-records`,
> that records all the skipped records due to deserialization errors.
> 2) on the lower processor-node level, we have a
> `skippedDueToDeserializationError`, that records the skipped records on
> that specific source node due to deserialization errors.
> So you can see that 1) does not cover any other scenarios and can just be
> thought of as an aggregate of 2) across all the tasks' source nodes.
> However, there are other places that can cause a record to be dropped, for
> example:
> 1) https://issues.apache.org/jira/browse/KAFKA-5784: records could be
> dropped due to window elapsed.
> 2) KIP-210: records could be dropped on the producer side.
> 3) records could be dropped during user-customized processing on errors.
> {quote}
> [~guozhang] Not sure what you mean by "3) records could be dropped during user-customized processing on errors."
> Btw: we also drop record with {{null}} key and/or value for certain DSL operations. This should be included as well.
> KIP: : https://cwiki.apache.org/confluence/display/KAFKA/KIP-274%3A+Kafka+Streams+Skipped+Records+Metrics
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