npawar commented on a change in pull request #6667:
URL: https://github.com/apache/incubator-pinot/pull/6667#discussion_r595585236
##########
File path:
pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/PinotTableIdealStateBuilder.java
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@@ -115,14 +117,22 @@ public static void
buildLowLevelRealtimeIdealStateFor(PinotLLCRealtimeSegmentMan
pinotLLCRealtimeSegmentManager.setUpNewTable(realtimeTableConfig,
idealState);
}
- public static int getPartitionCount(StreamConfig streamConfig) {
- PartitionCountFetcher partitionCountFetcher = new
PartitionCountFetcher(streamConfig);
+ /**
+ * Fetches the list of {@link PartitionGroupInfo} for the stream, with the
help of the current partitionGroups metadata
+ * This call will only skip partitions which have reached end of life and
all messages from that partition have been consumed.
+ * The current partition group metadata is used to determine the offsets
that have been consumed for a partition.
+ * The current partition group metadata is also used to know about existing
partition groupings which should not be disturbed
Review comment:
Added a more descriptive comment
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