[FLINK-38939][runtime] Pause sources until the 1st checkpoint to prioritize processing recovered records #27440
+453
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…eived This allows to prioritize processing of recovered records (when recovering from an unaligned checkpoint)
…g for a checkpoint
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davidradl
reviewed
Jan 20, 2026
| <td><h5>pipeline.sources.pause-until-first-checkpoint</h5></td> | ||
| <td style="word-wrap: break-word;">true</td> | ||
| <td>Boolean</td> | ||
| <td>Don't pull any data from sources until the first checkpoint is triggered. This might be helpful in reducing recovery times. Incompatible 0 value for execution.checkpointing.interval-during-backlog</td> |
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I suggest expanding on "This might be helpful in reducing recovery times." to be specific about the scenarios that this would be helpful in. Are there scenarios it would not be helpful in? If there are no downsides to this change - then do we need a config option?
I am not sure what Incompatible 0 value for execution.checkpointing.interval-during-backlog means .
davidradl
reviewed
Jan 20, 2026
| && checkpointConfig.isPauseSourcesUntilFirstCheckpoint()) { | ||
| throw new IllegalArgumentException( | ||
| "Pausing sources until first checkpoint is incompatible with disabling checkpoints during backlog processing. " | ||
| + "Please consult " |
Contributor
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nit: "Please consult ...." -> "Please review and choose whether you require + CheckpointingOptions.PAUSE_SOURCES_UNTIL_FIRST_CHECKPOINT.key()
+ " or"
+ CheckpointingOptions.CHECKPOINTING_INTERVAL_DURING_BACKLOG.key());
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