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https://issues.apache.org/jira/browse/KAFKA-10172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17146032#comment-17146032
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Chia-Ping Tsai commented on KAFKA-10172:
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> After further investigation we found out that some tasks were doubled, so
> metrics are truthful.
Step to reproduce: just rollout restart connects pods.
it seems you have resolved this issue? If so, please close this one :)
> [Kafka connect] connectors, tasks metrics doubled
> -------------------------------------------------
>
> Key: KAFKA-10172
> URL: https://issues.apache.org/jira/browse/KAFKA-10172
> Project: Kafka
> Issue Type: Bug
> Components: KafkaConnect
> Affects Versions: 2.3.1
> Reporter: Viktor Utkin
> Priority: Critical
> Attachments: image-2020-06-16-12-42-47-753.png
>
>
> After re-balance of connect cluster (4 nodes in total) we noticed that metrics
> * kafka_connect_connect_worker_metrics_task_count
> * kafka_connect_connect_worker_metrics_connector_count
> are doubled (2x,3x,4x,etc.), so connect show wrong values.
>
> !image-2020-06-16-12-42-47-753.png|width=481,height=240!
>
> But when we request number of connector via RESP API it shows only 36:
> {code:java}
> › curl -s 127.0.0.1:8083/connectors | jq '.[]' | sort | wc -l
> 36{code}
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