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${ noResults }
src-kafka/clients
Tom Bentley
269b65279c
See also KIP-183. This implements the following algorithm: AdminClient sends ElectPreferredLeadersRequest. KafakApis receives ElectPreferredLeadersRequest and delegates to ReplicaManager.electPreferredLeaders() ReplicaManager delegates to KafkaController.electPreferredLeaders() KafkaController adds a PreferredReplicaLeaderElection to the EventManager, ReplicaManager.electPreferredLeaders()'s callback uses the delayedElectPreferredReplicasPurgatory to wait for the results of the election to appear in the metadata cache. If there are no results because of errors, or because the preferred leaders are already leading the partitions then a response is returned immediately. In the EventManager work thread the preferred leader is elected as follows: The EventManager runs PreferredReplicaLeaderElection.process() process() calls KafkaController.onPreferredReplicaElectionWithResults() KafkaController.onPreferredReplicaElectionWithResults() calls the PartitionStateMachine.handleStateChangesWithResults() to perform the election (asynchronously the PSM will send LeaderAndIsrRequest to the new and old leaders and UpdateMetadataRequest to all brokers) then invokes the callback. Reviewers: Colin P. McCabe <cmccabe@apache.org>, Jun Rao <junrao@gmail.com> |
6 years ago | |
|---|---|---|
| .. | ||
| src | KAFKA-5692: Change PreferredReplicaLeaderElectionCommand to use Admin… (#3848) | 6 years ago |
| .gitignore |
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