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Can't use side inputs with Combine.PerKeyWithHotKeyFanout #20637
Description
PerKeyWithHotKeyFanout doesn't allow a user to specify a side input and access it in the CombineFn. When the function withHotKeyFanout is called, any sideinputs stored in the Combine.PerKey are dropped. (https://github.com/apache/beam/blob/master/sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/Combine.java#L1571):
public PerKeyWithHotKeyFanout<K, InputT, OutputT> withHotKeyFanout(
SerializableFunction<?
super K, Integer> hotKeyFanout) {
return new PerKeyWithHotKeyFanout<>(fn, fnDisplayData, hotKeyFanout);
}
We would like to be able to use side inputs and hot key fanout.
Imported from Jira BEAM-11005. Original Jira may contain additional context.
Reported by: miagilepner.
Activity
blazingbhavneek commentedon May 12, 2023
Hey there! 👋 I'm new to this repository and eager to contribute! 🌟 Could you kindly suggest some entry point or files to look into?
damccorm commentedon May 15, 2023
Hey, saw you added this comment several places. I'd recommend focusing on a single issue at first (I answered the underlying question here - #20298 (comment))
marc7806 commentedon Oct 6, 2023
.take-issue
singhmrinal02 commentedon Sep 16, 2026
Hi, I'd like to work on this issue as a first contribution to Apache . Could you please assign it to me?