ijuma commented on code in PR #12416:
URL: https://github.com/apache/kafka/pull/12416#discussion_r922975981
##########
clients/src/main/java/org/apache/kafka/common/network/Selector.java:
##########
@@ -652,6 +652,11 @@ void write(KafkaChannel channel) throws IOException {
if (send != null) {
this.completedSends.add(send);
this.sensors.recordCompletedSend(nodeId, send.size(),
currentTimeMs);
+
+ // To fix KAFKA-13559, i.e. select(timeout) blocks for 300 ms
when the socket has no data but the buffer
+ // has data. Only happens when using SSL.
+ if (channel.hasBytesBuffered())
+ madeReadProgressLastPoll = true;
Review Comment:
It's weird to change this read related variable after we have done a write.
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