wsry commented on a change in pull request #11351: [FLINK-16404][runtime] Solve
the potential deadlock problem when reducing exclusive buffers to zero
URL: https://github.com/apache/flink/pull/11351#discussion_r404583572
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/PipelinedSubpartition.java
##########
@@ -197,13 +197,18 @@ BufferAndBacklog pollBuffer() {
return null;
}
+ boolean isExactlyOnceCheckpointBarrier =
buffer.getDataType().isExactlyOnceCheckpointBarrier();
+ if (isExactlyOnceCheckpointBarrier) {
+ readView.blockOnCheckpointBarrier();
+ }
+
updateStatistics(buffer);
// Do not report last remaining buffer on buffers as
available to read (assuming it's unfinished).
// It will be reported for reading either on flush or
when the number of buffers in the queue
// will be 2 or more.
return new BufferAndBacklog(
buffer,
- isAvailableUnsafe(),
+ isAvailableUnsafe() &&
!isExactlyOnceCheckpointBarrier,
Review comment:
I have unified this tag with isAvailable.
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