AmatyaAvadhanula commented on code in PR #16667:
URL: https://github.com/apache/druid/pull/16667#discussion_r1671728038
##########
indexing-service/src/main/java/org/apache/druid/indexing/common/task/KillUnusedSegmentsTask.java:
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@@ -231,16 +234,57 @@ public TaskStatus runTask(TaskToolbox toolbox) throws
Exception
);
}
- // Kill segments
- // Order is important here: we want the nuke action to clean up the
metadata records _before_ the
- // segments are removed from storage, this helps maintain that we will
always have a storage segment if
- // the metadata segment is present. If the segment nuke throws an
exception, then the segment cleanup is
- // abandoned.
+ // Kill segments. Order is important here:
+ // Retrieve the segment upgrade infos for the batch _before_ the
segments are nuked
+ // We then want the nuke action to clean up the metadata records
_before_ the segments are removed from storage.
+ // This helps maintain that we will always have a storage segment if the
metadata segment is present.
+ // Determine the subset of segments to be killed from deep storage based
on loadspecs.
+ // If the segment nuke throws an exception, then the segment cleanup is
abandoned.
+
+ // Determine upgraded_from_segment_id before nuking
Review Comment:
Done
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