Examples with EndQuorumEpochResponseData org.apache.kafka.common.message.EndQuorumEpochResponseData used on opensource projects

Example 6 with EndQuorumEpochResponseData

use of org.apache.kafka.common.message.EndQuorumEpochResponseData in project kafka by apache.

the class KafkaRaftClient method handleEndQuorumEpochRequest.

/**
 * Handle an EndEpoch request. This API may return the following errors:
 *
 * - {@link Errors#INCONSISTENT_CLUSTER_ID} if the cluster id is presented in request
 *      but different from this node
 * - {@link Errors#BROKER_NOT_AVAILABLE} if this node is currently shutting down
 * - {@link Errors#INCONSISTENT_VOTER_SET} if the request suggests inconsistent voter membership (e.g.
 *      if this node or the sender is not one of the current known voters)
 * - {@link Errors#FENCED_LEADER_EPOCH} if the epoch is smaller than this node's epoch
 */
private EndQuorumEpochResponseData handleEndQuorumEpochRequest(RaftRequest.Inbound requestMetadata, long currentTimeMs) {
    EndQuorumEpochRequestData request = (EndQuorumEpochRequestData) requestMetadata.data;
    if (!hasValidClusterId(request.clusterId())) {
        return new EndQuorumEpochResponseData().setErrorCode(Errors.INCONSISTENT_CLUSTER_ID.code());
    }
    if (!hasValidTopicPartition(request, log.topicPartition())) {
        // Until we support multi-raft, we treat topic partition mismatches as invalid requests
        return new EndQuorumEpochResponseData().setErrorCode(Errors.INVALID_REQUEST.code());
    }
    EndQuorumEpochRequestData.PartitionData partitionRequest = request.topics().get(0).partitions().get(0);
    int requestEpoch = partitionRequest.leaderEpoch();
    int requestLeaderId = partitionRequest.leaderId();
    Optional<Errors> errorOpt = validateVoterOnlyRequest(requestLeaderId, requestEpoch);
    if (errorOpt.isPresent()) {
        return buildEndQuorumEpochResponse(errorOpt.get());
    }
    maybeTransition(OptionalInt.of(requestLeaderId), requestEpoch, currentTimeMs);
    if (quorum.isFollower()) {
        FollowerState state = quorum.followerStateOrThrow();
        if (state.leaderId() == requestLeaderId) {
            List<Integer> preferredSuccessors = partitionRequest.preferredSuccessors();
            long electionBackoffMs = endEpochElectionBackoff(preferredSuccessors);
            logger.debug("Overriding follower fetch timeout to {} after receiving " + "EndQuorumEpoch request from leader {} in epoch {}", electionBackoffMs, requestLeaderId, requestEpoch);
            state.overrideFetchTimeout(currentTimeMs, electionBackoffMs);
        }
    }
    return buildEndQuorumEpochResponse(Errors.NONE);
}