walterddr commented on code in PR #10870:
URL: https://github.com/apache/pinot/pull/10870#discussion_r1222195019
##########
pinot-query-runtime/src/main/java/org/apache/pinot/query/runtime/executor/RoundRobinScheduler.java:
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@@ -169,6 +169,8 @@ public void deregister(OpChain operatorChain) {
} finally {
_lock.unlock();
}
+ // invoke opChain deregister callback
+ operatorChain.getOpChainFinishCallback().accept(operatorChain.getId());
Review Comment:
I dont actually like this way of doing things.
`opChain.finish` call back should be automatically called when deregistered.
however this rely on a very specific impl of the Scheduler.deregister.
let's refactor this later as both the onDataAvai and onFinish callback seems
a bit weird.
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