Jackie-Jiang commented on a change in pull request #8242:
URL: https://github.com/apache/pinot/pull/8242#discussion_r815206489
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File path:
pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/PinotHelixResourceManager.java
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@@ -2963,6 +2961,25 @@ public String startReplaceSegments(String
tableNameWithType, List<String> segmen
return segmentLineageEntryId;
}
+ // TODO: Add more conflict checks over segmentsTo later. For example, for
APPEND table,
+ // if the new segments from 2 batch jobs are overlapping, we reject
one of job.
+ private static boolean isConflicted(List<String> segmentsFrom, LineageEntry
lineageEntry, TableConfig tableConfig) {
+ if (!segmentsFrom.isEmpty()) {
+ // It's conflicted if there is any overlap between segmentsFrom.
+ return !Collections.disjoint(segmentsFrom,
lineageEntry.getSegmentsFrom());
+ }
+ // For REFRESH table, it's conflicted if both segmentsFrom are empty.
+ if (isRefreshTable(tableConfig)) {
Review comment:
I don't follow the logic here. Say I have a refresh table, and I
scheduled multiple segment ingestion tasks in parallel, why should one task
kill another?
IMO, we should only perform the disjoint check because having common source
segments can result in duplicate data
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