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https://issues.apache.org/jira/browse/FLINK-18656?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Piotr Nowojski updated FLINK-18656:
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Attachment: Screenshot 2020-07-21 at 09.58.29.png
> Start Delay metric is always zero for unaligned checkpoints
> -----------------------------------------------------------
>
> Key: FLINK-18656
> URL: https://issues.apache.org/jira/browse/FLINK-18656
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Metrics, Runtime / Network
> Affects Versions: 1.11.1
> Reporter: Piotr Nowojski
> Priority: Critical
> Fix For: 1.12.0, 1.11.2
>
> Attachments: Screenshot 2020-07-21 at 09.53.21.png, Screenshot
> 2020-07-21 at 09.58.29.png
>
>
> As visible in the attached screenshot, start delay is 0, despite very high
> end to end time and very quick async/sync times. This is impossible, as
> "start delay" should be equal to "end_to_end_time - sync_time - async_time".
> The bug is probably in {{CheckpointBarrierUnaligner}} class, which seems to
> never invoke {{CheckpointBarrierHandler#markCheckpointStart}}.
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