yanghua commented on a change in pull request #6544: [FLINK-8532] [Streaming]
modify RebalancePartitioner to use a random partition as its first partition
URL: https://github.com/apache/flink/pull/6544#discussion_r209517591
##########
File path:
flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/partitioner/RebalancePartitioner.java
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@@ -36,9 +38,13 @@
@Override
public int[] selectChannels(SerializationDelegate<StreamRecord<T>>
record,
int numberOfOutputChannels) {
- int newChannel = ++this.returnArray[0];
- if (newChannel >= numberOfOutputChannels) {
- this.returnArray[0] = 0;
+ if (this.returnArray[0] < 0) {
+ this.returnArray[0] = new
Random().nextInt(numberOfOutputChannels);
Review comment:
May be use `ThreadLocalRandom.current().nextInt` would be better than `new
Random().nextInt`. Even if you use `Random` class, there is no need to create
it every time, when calling this method.
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