walterddr commented on code in PR #10971:
URL: https://github.com/apache/pinot/pull/10971#discussion_r1241315331
##########
pinot-query-runtime/src/main/java/org/apache/pinot/query/runtime/plan/pipeline/PipelineBreakerOperator.java:
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@@ -50,6 +50,9 @@ public PipelineBreakerOperator(OpChainExecutionContext
context,
_expectedKeySet = ImmutableSet.copyOf(pipelineWorkerMap.keySet());
_workerEntries = new ArrayDeque<>();
_workerEntries.addAll(pipelineWorkerMap.entrySet());
+ for (int workerKey : _expectedKeySet) {
+ _resultMap.put(workerKey, new ArrayList<>());
Review Comment:
Oh this is b/c we might be null instead of empty pipeline result from a
stage. Alternatively we can handle null and empty as equal when retrieve
pipeline breaker results
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