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https://issues.apache.org/jira/browse/KAFKA-19530?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18008695#comment-18008695
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黃竣陽 commented on KAFKA-19530:
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Hello [~ckamal], if you not work on this, may I take it?
> RemoteLogManager should record lag stats when remote storage is offline
> -----------------------------------------------------------------------
>
> Key: KAFKA-19530
> URL: https://issues.apache.org/jira/browse/KAFKA-19530
> Project: Kafka
> Issue Type: Task
> Reporter: Kamal Chandraprakash
> Priority: Major
>
> When remote storage is offline, then the segmentLag and bytesLag metrics are
> not recorded. These metrics are useful to know the pending data to upload
> when remote storage is down.
> https://sourcegraph.com/github.com/apache/kafka/-/blob/storage/src/main/java/org/apache/kafka/server/log/remote/storage/RemoteLogManager.java?L1088
> Calculate the bytesLag and segmentsLag when
> `remoteStorageManagerPlugin.get().copyLogSegmentData` throws error
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