leventov commented on a change in pull request #7595: Optimize overshadowed
segments computation
URL: https://github.com/apache/incubator-druid/pull/7595#discussion_r289908504
##########
File path:
server/src/main/java/org/apache/druid/metadata/SQLMetadataSegmentManager.java
##########
@@ -502,18 +507,18 @@ public boolean removeSegment(SegmentId segmentId)
{
try {
final boolean removed = removeSegmentFromTable(segmentId.toString());
- Optional.ofNullable(dataSources).ifPresent(
- m ->
- m.computeIfPresent(
- segmentId.getDataSource(),
- (dsName, dataSource) -> {
- dataSource.removeSegment(segmentId);
- // Returning null from the lambda here makes the
ConcurrentHashMap to remove the current entry.
- //noinspection ReturnOfNull
- return dataSource.isEmpty() ? null : dataSource;
- }
- )
- );
+ if (dataSourcesSnapshot != null) {
+ final Map<String, ImmutableDruidDataSource> dataSourcesMap =
dataSourcesSnapshot.getDataSourcesMap();
Review comment:
Sounds good. Please ensure that it's documented properly: the comments
should include the reasoning and background from @jon-wei's comment.
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