yashmayya commented on code in PR #14495:
URL: https://github.com/apache/pinot/pull/14495#discussion_r1850339957
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pinot-query-planner/src/main/java/org/apache/pinot/query/planner/plannode/MailboxSendNode.java:
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@@ -28,7 +30,7 @@
public class MailboxSendNode extends BasePlanNode {
- private final int _receiverStageId;
+ private final BitSet _receiverStages;
Review Comment:
> Originally I though about just changing the current field to add repeat,
but it looks like that is problematic on numbers (see
https://protobuf.dev/programming-guides/proto3/#updating).
Ah, that's unfortunate, that's exactly what I was curious about.
> Case 1. is impossible as long as we update servers before brokers (which
AFAIK is the recommendation)
The recommended order is controller -> broker -> server
(https://docs.pinot.apache.org/operators/operating-pinot/upgrading-pinot-cluster).
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