loquisgon commented on code in PR #12443:
URL: https://github.com/apache/druid/pull/12443#discussion_r876430129
##########
indexing-service/src/main/java/org/apache/druid/indexing/common/task/batch/parallel/ParallelIndexSupervisorTask.java:
##########
@@ -703,6 +704,10 @@ TaskStatus runHashPartitionMultiPhaseParallel(TaskToolbox
toolbox) throws Except
cardinalityRunner.getReports().values(),
effectiveMaxRowsPerSegment
);
+
+ // This is for potential debugging in case we suspect bad estimation
of cardinalities etc,
+ LOG.debug("intervalToNumShards: %s", intervalToNumShards.toString());
+
Review Comment:
I have instrumented the `Task`'s to make it easier to emit metrics... we
can delay this PR until [this other PR with the metrics
instrumentation](https://github.com/apache/druid/pull/12488) merges and then I
can easily add the metric.
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