zhijiangW commented on a change in pull request #11507: [FLINK-16587] Add basic
CheckpointBarrierHandler for unaligned checkpoint
URL: https://github.com/apache/flink/pull/11507#discussion_r400309436
##########
File path:
flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/tasks/StreamTask.java
##########
@@ -880,6 +893,31 @@ private boolean performCheckpoint(
}
}
+ private void prepareInflightDataSnapshot(long checkpointId) throws
IOException {
+ // For source task we do not have input processor
+ CompletableFuture<?> inputPreparedFuture;
+ if (inputProcessor != null) {
+ inputPreparedFuture =
inputProcessor.prepareSnapshot(checkpointId);
+ } else {
+ inputPreparedFuture =
CompletableFuture.completedFuture(null);
+ }
+
+ ResultPartitionWriter[] writers =
getEnvironment().getAllWriters();
+ for (ResultPartitionWriter writer : writers) {
+ for (int i = 0; i < writer.getNumberOfSubpartitions();
i++) {
+ ResultSubpartition subpartition =
writer.getSubpartition(i);
+ channelStateWriter.addOutputData(
+ checkpointId,
+ subpartition.getSubpartitionInfo(),
+
ChannelStateWriter.SEQUENCE_NUMBER_UNKNOWN,
+
subpartition.getInflightBufferSnapshot().toArray(new Buffer[0]));
+ }
+ }
+
+ // finish channelStateWriter after all input (future) and
output (above block) buffers have been added
+ inputPreparedFuture.thenAccept(unused ->
channelStateWriter.finish(checkpointId));
Review comment:
nit:
```
if (inputProcessor != null) {
inputProcessor.prepareSnapshot(checkpointId).thenAccept(unused
-> channelStateWriter.finish(checkpointId));
} else {
channelStateWriter.finish(checkpointId);
}
```
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