Jackie-Jiang commented on code in PR #8584:
URL: https://github.com/apache/pinot/pull/8584#discussion_r862273056
##########
pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/assignment/segment/RealtimeSegmentAssignment.java:
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@@ -368,12 +364,19 @@ private List<String> assignCompletedSegment(String
segmentName, Map<String, Map<
// Replica-group based assignment
// Uniformly spray the segment partitions over the instance partitions
- int segmentPartitionId =
- SegmentUtils.getRealtimeSegmentPartitionId(segmentName,
_realtimeTableName, _helixManager, _partitionColumn);
- int numPartitions = instancePartitions.getNumPartitions();
- int partitionGroupId = segmentPartitionId % numPartitions;
- return SegmentAssignmentUtils
- .assignSegmentWithReplicaGroup(currentAssignment,
instancePartitions, partitionGroupId);
+ int partitionId = getPartitionGroupId(segmentName) %
instancePartitions.getNumPartitions();
+ return
SegmentAssignmentUtils.assignSegmentWithReplicaGroup(currentAssignment,
instancePartitions, partitionId);
+ }
+ }
+
+ private int getPartitionGroupId(String segmentName) {
+ Integer segmentPartitionId =
+ SegmentUtils.getRealtimeSegmentPartitionId(segmentName,
_realtimeTableName, _helixManager, _partitionColumn);
+ if (segmentPartitionId == null) {
+ // This case is for the uploaded segments for which there's no partition
information
+ // Choose a random, but consistent, partition id
+ segmentPartitionId = Math.abs(segmentName.hashCode());
Review Comment:
+1. We may bound the partition group id to some large number (e.g.
`Math.abs(segmentName.hashCode() % 10000)`
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