zhongqishang commented on code in PR #10526:
URL: https://github.com/apache/iceberg/pull/10526#discussion_r1683742893
##########
flink/v1.19/flink/src/main/java/org/apache/iceberg/flink/sink/IcebergFilesCommitter.java:
##########
@@ -426,30 +425,44 @@ private void commitOperation(
}
@Override
- public void processElement(StreamRecord<WriteResult> element) {
- this.writeResultsOfCurrentCkpt.add(element.getValue());
+ public void processElement(StreamRecord<FlinkWriteResult> element) {
+ FlinkWriteResult flinkWriteResult = element.getValue();
+ List<WriteResult> writeResults =
+ writeResultsSinceLastSnapshot.computeIfAbsent(
+ flinkWriteResult.checkpointId(), k -> Lists.newArrayList());
+ writeResults.add(flinkWriteResult.writeResult());
}
@Override
public void endInput() throws IOException {
// Flush the buffered data files into 'dataFilesPerCheckpoint' firstly.
- long currentCheckpointId = Long.MAX_VALUE;
- dataFilesPerCheckpoint.put(currentCheckpointId,
writeToManifest(currentCheckpointId));
- writeResultsOfCurrentCkpt.clear();
-
+ long currentCheckpointId = IcebergStreamWriter.END_INPUT_CHECKPOINT_ID;
+ writeToManifestSinceLastSnapshot(currentCheckpointId);
commitUpToCheckpoint(dataFilesPerCheckpoint, flinkJobId, operatorUniqueId,
currentCheckpointId);
}
+ private void writeToManifestSinceLastSnapshot(long checkpointId) throws
IOException {
+ if (!writeResultsSinceLastSnapshot.containsKey(checkpointId)) {
+ dataFilesPerCheckpoint.put(checkpointId, EMPTY_MANIFEST_DATA);
+ }
+
+ for (Map.Entry<Long, List<WriteResult>> writeResultsOfCkpt :
Review Comment:
> should we add Preconditions check that the writeResultsSinceLastSnapshot
contains checkpointIds <= the current checkpointId?
I think we can't add a Preconditions check, because the method needs to
consider the case where writeResultsSinceLastSnapshot is empty.
> We may have a problem in case of concurrent checkpoints (say 1 and 2).
when checkpoint 1 snapshot method is executed, we shall not write the data
files partially received for checkpoint 2 to manifest file. we should only
process the map entries up to the checkpointId
I discussed this scenario (If I understand correctly) with @pvary and we
concluded that it is not possible.
https://github.com/apache/iceberg/pull/10526#discussion_r1650849668
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