AmatyaAvadhanula commented on code in PR #15699:
URL: https://github.com/apache/druid/pull/15699#discussion_r1461371213
##########
indexing-service/src/main/java/org/apache/druid/indexing/common/actions/RetrieveUsedSegmentsAction.java:
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@@ -113,11 +131,81 @@ public TypeReference<Collection<DataSegment>>
getReturnTypeReference()
@Override
public Collection<DataSegment> perform(Task task, TaskActionToolbox toolbox)
+ {
+ // The DruidInputSource can be used to read from one datasource and write
to another.
+ // In such a case, the race condition described in the class-level docs
cannot occur,
+ // and the action can simply fetch all visible segments for the datasource
and interval.
+ // Similarly, an MSQ replace could read from a different datasource.
Review Comment:
Simplified, thanks
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