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https://issues.apache.org/jira/browse/FLINK-10820?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16699082#comment-16699082
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ASF GitHub Bot commented on FLINK-10820:
----------------------------------------
zhijiangW commented on a change in pull request #7051: [FLINK-10820][network]
Simplify the RebalancePartitioner implementation
URL: https://github.com/apache/flink/pull/7051#discussion_r236286868
##########
File path:
flink-runtime/src/test/java/org/apache/flink/runtime/operators/util/OutputEmitterTest.java
##########
@@ -211,26 +214,35 @@ public void testWrongKeyClass() throws Exception {
try {
delegate.setInstance(record);
- selector.selectChannels(delegate, 100);
+ selector.selectChannels(delegate);
} catch (DeserializationException re) {
return;
}
Assert.fail("Expected a NullKeyFieldException.");
}
+ private ChannelSelector createChannelSelector(
+ ShipStrategyType shipStrategyType,
+ TypeComparator comparator,
+ int numChannels) {
Review comment:
yes
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> Simplify the RebalancePartitioner implementation
> ------------------------------------------------
>
> Key: FLINK-10820
> URL: https://issues.apache.org/jira/browse/FLINK-10820
> Project: Flink
> Issue Type: Sub-task
> Components: Network
> Affects Versions: 1.8.0
> Reporter: zhijiang
> Assignee: zhijiang
> Priority: Minor
> Labels: pull-request-available
>
> _The current {{RebalancePartitioner}} implementation seems a little hacky for
> selecting a random number as the first channel index, and the following
> selections based on this random index in round-robin fashion._
> _Especially for the corner case of {{numChannels = Integer.MAX_VALUE}}, it
> would trigger next random index once reaching the last channel index.
> Actually the random index should be selected only once at the first time._
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