mcvsubbu commented on a change in pull request #7058:
URL: https://github.com/apache/incubator-pinot/pull/7058#discussion_r668903399
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File path:
pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/realtime/PinotLLCRealtimeSegmentManager.java
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@@ -539,15 +543,42 @@ private void commitSegmentMetadataInternal(String
realtimeTableName,
lock.unlock();
}
- // TODO: also create the new partition groups here, instead of waiting
till the {@link RealtimeSegmentValidationManager} runs
+ // Creates new partition groups here instead of waiting till the {@link
RealtimeSegmentValidationManager} runs
// E.g. If current state is A, B, C, and newPartitionGroupMetadataList
contains B, C, D, E,
- // then create metadata/idealstate entries for D, E along with the
committing partition's entries.
- // Ensure that multiple committing segments don't create multiple new
segment metadata and ideal state entries for the same partitionGroup
+ // then metadata/idealstate entries for D, E are created along with the
committing partition's entries.
+
+ addNewPartitionGroups(realtimeTableName, tableConfig, instancePartitions,
idealState, numReplicas, streamConfig,
+ newPartitionGroupMetadataList, numPartitionGroups, segmentAssignment,
instancePartitionsMap);
// Trigger the metadata event notifier
_metadataEventNotifierFactory.create().notifyOnSegmentFlush(tableConfig);
}
+ /**
+ * Method is kept synchronised so that multiple committing segments don't
create multiple new segment metadata
+ * and ideal state entries for the same partitionGroup
+ */
+ private synchronized void addNewPartitionGroups(String realtimeTableName,
TableConfig tableConfig,
Review comment:
- The code updates ideal state, but it is not written back to zookeeper
anywhere.
- It is possible (under some race conditions) that the background job runs
in another controller. Need to be careful here. Good thing is, I have added
code for idealstate update (PR #6483) so that we don't create two segments with
the same seq number but different timestamp. It covers all existing code path,
but since this is a new code path, you should make sure that is covered. In
that case, the idealstate update will fail with an exception, and you need to
handle it correctly.
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