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https://issues.apache.org/jira/browse/FLINK-10820?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16700214#comment-16700214
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ASF GitHub Bot commented on FLINK-10820:
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pnowojski commented on a change in pull request #7051: [FLINK-10820][network]
Simplify the RebalancePartitioner implementation
URL: https://github.com/apache/flink/pull/7051#discussion_r236609171
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File path:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/api/writer/RoundRobinChannelSelector.java
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@@ -32,9 +32,16 @@
/** Stores the index of the channel to send the next record to. */
private final int[] nextChannelToSendTo = new int[] { -1 };
+ private int numChannels;
Review comment:
We can unify it lazily (later) towards `numberOfChannels`, unless you want
to fix it now :)
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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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