maytasm commented on a change in pull request #10371:
URL: https://github.com/apache/druid/pull/10371#discussion_r489160535
##########
File path:
server/src/main/java/org/apache/druid/server/coordinator/duty/CompactSegments.java
##########
@@ -238,25 +272,102 @@ private CoordinatorStats makeStats(int
numCompactionTasks, CompactionSegmentIter
{
final CoordinatorStats stats = new CoordinatorStats();
stats.addToGlobalStat(COMPACTION_TASK_COUNT, numCompactionTasks);
- totalSizesOfSegmentsAwaitingCompactionPerDataSource =
iterator.totalRemainingSegmentsSizeBytes();
-
totalSizesOfSegmentsAwaitingCompactionPerDataSource.object2LongEntrySet().fastForEach(
- entry -> {
- final String dataSource = entry.getKey();
- final long totalSizeOfSegmentsAwaitingCompaction =
entry.getLongValue();
- stats.addToDataSourceStat(
- TOTAL_SIZE_OF_SEGMENTS_AWAITING_COMPACTION,
- dataSource,
- totalSizeOfSegmentsAwaitingCompaction
- );
- }
- );
+
+ // Make sure that the iterator iterate through all the remaining segments
so that we can get accurate and correct
+ // statistics (remaining, skipped, processed, etc.). The reason we have to
do this explicitly here is because
+ // earlier (when we are iterating to submit compaction tasks) we may have
ran out of task slot and were not able
+ // to iterate to the first segment that needs compaction for some
datasource.
+ iterator.flushAllSegments();
Review comment:
I'll add it to the Druid docs in the follow up PR. I did also add it as
a comment in DruidCoordinator.java
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