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Fallback to fetch v12 (#10) #4806

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merged 2 commits into from
Sep 24, 2024
Merged

Fallback to fetch v12 (#10) #4806

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50e6867
Fallback to fetch v12 (#10)
anchitj Aug 8, 2024
d7a7d78
PR Feedback (#41)
anchitj Sep 24, 2024
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22 changes: 21 additions & 1 deletion src/rdkafka_fetcher.c
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Original file line number Diff line number Diff line change
Expand Up @@ -943,7 +943,21 @@ static void rd_kafka_broker_fetch_reply(rd_kafka_t *rk,
}
}

/**
* @brief Check if any toppars have a zero topic id.
*
*/
static rd_bool_t can_use_topic_ids(rd_kafka_broker_t *rkb) {
rd_kafka_toppar_t *rktp = rkb->rkb_active_toppar_next;
do {
if (RD_KAFKA_UUID_IS_ZERO(rktp->rktp_rkt->rkt_topic_id))
return rd_false;
} while ((rktp = CIRCLEQ_LOOP_NEXT(&rkb->rkb_active_toppars, rktp,
rktp_activelink)) !=
rkb->rkb_active_toppar_next);

return rd_true;
}

/**
* @brief Build and send a Fetch request message for all underflowed toppars
Expand Down Expand Up @@ -979,7 +993,13 @@ int rd_kafka_broker_fetch_toppars(rd_kafka_broker_t *rkb, rd_ts_t now) {

ApiVersion = rd_kafka_broker_ApiVersion_supported(rkb, RD_KAFKAP_Fetch,
0, 16, NULL);
rkbuf = rd_kafka_buf_new_flexver_request(

/* Fallback to version 12 if topic id is null which can happen if
* inter.broker.protocol.version is < 2.8 */
ApiVersion =
ApiVersion > 12 && can_use_topic_ids(rkb) ? ApiVersion : 12;

rkbuf = rd_kafka_buf_new_flexver_request(
rkb, RD_KAFKAP_Fetch, 1,
/* MaxWaitTime+MinBytes+MaxBytes+IsolationLevel+
* SessionId+Epoch+TopicCnt */
Expand Down