Add a queue of zookeeper notifications in the zookeeper consumer to reduce the
number of rebalancing attempts
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Key: KAFKA-265
URL: https://issues.apache.org/jira/browse/KAFKA-265
Project: Kafka
Issue Type: Sub-task
Components: core
Affects Versions: 0.7
Reporter: Neha Narkhede
Assignee: Jun Rao
Fix For: 0.7.1
The correct fix for KAFKA-262 and other known issues with the current consumer
rebalancing approach, is to get rid of the cache in the zookeeper consumer.
The side-effect of that fix, though, is the large number of zookeeper
notifications that will trigger a full rebalance operation on the consumer.
Ideally, the zookeeper notifications can be batched and only one rebalance
operation can be triggered for several such ZK notifications.
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