pnowojski commented on a change in pull request #8467: [FLINK-12535][network]
Make CheckpointBarrierHandler non-blocking
URL: https://github.com/apache/flink/pull/8467#discussion_r287723725
##########
File path:
flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/io/StreamInputProcessor.java
##########
@@ -206,27 +207,35 @@ public boolean processInput() throws Exception {
}
}
- final BufferOrEvent bufferOrEvent =
barrierHandler.getNextNonBlocked();
- if (bufferOrEvent != null) {
- if (bufferOrEvent.isBuffer()) {
- currentChannel =
bufferOrEvent.getChannelIndex();
- currentRecordDeserializer =
recordDeserializers[currentChannel];
-
currentRecordDeserializer.setNextBuffer(bufferOrEvent.getBuffer());
- }
- else {
- // Event received
- final AbstractEvent event =
bufferOrEvent.getEvent();
- if (event.getClass() !=
EndOfPartitionEvent.class) {
- throw new
IOException("Unexpected event: " + event);
+ final Optional<BufferOrEvent> bufferOrEvent =
barrierHandler.pollNext();
+ if (bufferOrEvent.isPresent()) {
+ processBufferOrEvent(bufferOrEvent.get());
+ } else {
+ if (!barrierHandler.isFinished()) {
+ barrierHandler.isAvailable().get();
Review comment:
@Aitozi at the moment yes. To make it work correctly with mailbox thread,
this change of non blocking `BarrierHandler` has to be integrated with pending
@StefanRRichter 's PR.
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