AHeise commented on a change in pull request #12353:
URL: https://github.com/apache/flink/pull/12353#discussion_r432967103
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/api/writer/BroadcastRecordWriter.java
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@@ -130,7 +132,7 @@ public BufferBuilder requestNewBufferBuilder(int
targetChannel) throws IOExcepti
BufferBuilder builder =
super.requestNewBufferBuilder(targetChannel);
if (randomTriggered) {
- addBufferConsumer(builder.createBufferConsumer(),
targetChannel);
+ addBufferConsumer(randomConsumer =
builder.createBufferConsumer(), targetChannel);
Review comment:
Okay I added a proposal that strives for a middle ground: buffer is
owned by `BufferBuilder` but not initialized before first buffer consumer is
being created. If consumers are always created from the same thread, we can
avoid making this cache volatile.
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