Jeff Kim created KAFKA-17578:
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Summary: Remove partitionRacks from TopicMetadata
Key: KAFKA-17578
URL: https://issues.apache.org/jira/browse/KAFKA-17578
Project: Kafka
Issue Type: Sub-task
Reporter: Jeff Kim
The ModernGroup#subscribedTopicMetadata takes too much memory due to
partitionRacks:
/**
* Map of every partition Id to a set of its rack Ids, if they exist.
* If rack information is unavailable for all partitions, this is an empty map.
*/
private final Map<Integer, Set<String>> partitionRacks;
This is not being used at the moment as the consumer protocol does not support
rack aware assignments.
A heap dump from a group with 500 members, 2K subscribed topic partitions shows
654,400 bytes used for partitionRacks. The rest of the ConsumerGroup object
holds 822,860 bytes.
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