Piotr Nowojski created FLINK-18656:
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Summary: 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: Improvement
Components: Runtime / Metrics, Runtime / Network
Affects Versions: 1.11.1
Reporter: Piotr Nowojski
Fix For: 1.12.0, 1.11.2
Attachments: Screenshot 2020-07-21 at 09.53.21.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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