1996fanrui commented on code in PR #28661:
URL: https://github.com/apache/flink/pull/28661#discussion_r3630862997
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flink-runtime/src/main/java/org/apache/flink/streaming/runtime/io/checkpointing/ChannelState.java:
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@@ -98,4 +111,26 @@ public ChannelState emptyState() {
sequenceNumberInAnnouncedChannels.clear();
return this;
}
+
+ /**
+ * Dispatches checkpoint start: inserts recovery-checkpoint barriers into
in-recovery channels
+ * through the trigger, then notifies every input. (FLINK-38544
transitional: the spilling
+ * backend adds a third step handing the trigger's snapshot reader to the
channel-state writer.)
+ */
+ public void onCheckpointStartedForAllInputs(CheckpointBarrier barrier)
+ throws CheckpointException, IOException {
+ long cpId = barrier.getId();
+ try {
+ recoveryCheckpointTrigger.snapshotAndInsertBarriers(cpId);
+
+ for (CheckpointableInput input : inputs) {
+ input.checkpointStarted(barrier);
+ }
+ } catch (Throwable t) {
+ if (t instanceof CheckpointException) {
+ throw (CheckpointException) t;
+ }
+ ExceptionUtils.rethrowIOException(t);
+ }
+ }
Review Comment:
This pr introduced Fetched channel state, but they are not integrated yet.
addInputDataFromSpill is not needed for Memory buffer.
They will be done in the next pr https://github.com/apache/flink/pull/28662
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