findingrish commented on code in PR #17025:
URL: https://github.com/apache/druid/pull/17025#discussion_r1756438582
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server/src/main/java/org/apache/druid/segment/metadata/CoordinatorSegmentMetadataCache.java:
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@@ -686,15 +696,21 @@ public RowSignature buildDataSourceRowSignature(final
String dataSource)
final Map<String, ColumnType> columnTypes = new LinkedHashMap<>();
if (segmentsMap != null && !segmentsMap.isEmpty()) {
- for (SegmentId segmentId : segmentsMap.keySet()) {
+ for (Map.Entry<SegmentId, AvailableSegmentMetadata> entry :
segmentsMap.entrySet()) {
+ SegmentId segmentId = entry.getKey();
Optional<SchemaPayloadPlus> optionalSchema =
segmentSchemaCache.getSchemaForSegment(segmentId);
if (optionalSchema.isPresent()) {
RowSignature rowSignature =
optionalSchema.get().getSchemaPayload().getRowSignature();
mergeRowSignature(columnTypes, rowSignature);
} else {
// mark it for refresh, however, this case shouldn't arise by design
- markSegmentAsNeedRefresh(segmentId);
log.debug("SchemaMetadata for segmentId [%s] is absent.", segmentId);
+
+ if (entry.getValue().getSegment().isTombstone()) {
Review Comment:
Refactored it and also added the check for unused segment.
We do not want to mark an unused segment for refresh encountered while
fetching metadata.
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