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-rw-r--r--fluent-bit/lib/librdkafka-2.1.0/src/rdkafka_fetcher.c1145
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diff --git a/fluent-bit/lib/librdkafka-2.1.0/src/rdkafka_fetcher.c b/fluent-bit/lib/librdkafka-2.1.0/src/rdkafka_fetcher.c
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+++ b/fluent-bit/lib/librdkafka-2.1.0/src/rdkafka_fetcher.c
@@ -0,0 +1,1145 @@
+/*
+ * librdkafka - The Apache Kafka C/C++ library
+ *
+ * Copyright (c) 2022 Magnus Edenhill
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+/**
+ * @name Fetcher
+ *
+ */
+
+#include "rdkafka_int.h"
+#include "rdkafka_offset.h"
+#include "rdkafka_msgset.h"
+#include "rdkafka_fetcher.h"
+
+
+/**
+ * Backoff the next Fetch request (due to error).
+ */
+static void rd_kafka_broker_fetch_backoff(rd_kafka_broker_t *rkb,
+ rd_kafka_resp_err_t err) {
+ int backoff_ms = rkb->rkb_rk->rk_conf.fetch_error_backoff_ms;
+ rkb->rkb_ts_fetch_backoff = rd_clock() + (backoff_ms * 1000);
+ rd_rkb_dbg(rkb, FETCH, "BACKOFF", "Fetch backoff for %dms: %s",
+ backoff_ms, rd_kafka_err2str(err));
+}
+
+/**
+ * @brief Backoff the next Fetch for specific partition
+ */
+static void rd_kafka_toppar_fetch_backoff(rd_kafka_broker_t *rkb,
+ rd_kafka_toppar_t *rktp,
+ rd_kafka_resp_err_t err) {
+ int backoff_ms = rkb->rkb_rk->rk_conf.fetch_error_backoff_ms;
+
+ /* Don't back off on reaching end of partition */
+ if (err == RD_KAFKA_RESP_ERR__PARTITION_EOF)
+ return;
+
+ /* Certain errors that may require manual intervention should have
+ * a longer backoff time. */
+ if (err == RD_KAFKA_RESP_ERR_TOPIC_AUTHORIZATION_FAILED)
+ backoff_ms = RD_MAX(1000, backoff_ms * 10);
+
+ rktp->rktp_ts_fetch_backoff = rd_clock() + (backoff_ms * 1000);
+
+ rd_rkb_dbg(rkb, FETCH, "BACKOFF",
+ "%s [%" PRId32 "]: Fetch backoff for %dms%s%s",
+ rktp->rktp_rkt->rkt_topic->str, rktp->rktp_partition,
+ backoff_ms, err ? ": " : "",
+ err ? rd_kafka_err2str(err) : "");
+}
+
+
+/**
+ * @brief Handle preferred replica in fetch response.
+ *
+ * @locks rd_kafka_toppar_lock(rktp) and
+ * rd_kafka_rdlock(rk) must NOT be held.
+ *
+ * @locality broker thread
+ */
+static void rd_kafka_fetch_preferred_replica_handle(rd_kafka_toppar_t *rktp,
+ rd_kafka_buf_t *rkbuf,
+ rd_kafka_broker_t *rkb,
+ int32_t preferred_id) {
+ const rd_ts_t one_minute = 60 * 1000 * 1000;
+ const rd_ts_t five_seconds = 5 * 1000 * 1000;
+ rd_kafka_broker_t *preferred_rkb;
+ rd_kafka_t *rk = rktp->rktp_rkt->rkt_rk;
+ rd_ts_t new_intvl =
+ rd_interval_immediate(&rktp->rktp_new_lease_intvl, one_minute, 0);
+
+ if (new_intvl < 0) {
+ /* In lieu of KIP-320, the toppar is delegated back to
+ * the leader in the event of an offset out-of-range
+ * error (KIP-392 error case #4) because this scenario
+ * implies the preferred replica is out-of-sync.
+ *
+ * If program execution reaches here, the leader has
+ * relatively quickly instructed the client back to
+ * a preferred replica, quite possibly the same one
+ * as before (possibly resulting from stale metadata),
+ * so we back off the toppar to slow down potential
+ * back-and-forth.
+ */
+
+ if (rd_interval_immediate(&rktp->rktp_new_lease_log_intvl,
+ one_minute, 0) > 0)
+ rd_rkb_log(rkb, LOG_NOTICE, "FETCH",
+ "%.*s [%" PRId32
+ "]: preferred replica "
+ "(%" PRId32
+ ") lease changing too quickly "
+ "(%" PRId64
+ "s < 60s): possibly due to "
+ "unavailable replica or stale cluster "
+ "state: backing off next fetch",
+ RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic),
+ rktp->rktp_partition, preferred_id,
+ (one_minute - -new_intvl) / (1000 * 1000));
+
+ rd_kafka_toppar_fetch_backoff(rkb, rktp,
+ RD_KAFKA_RESP_ERR_NO_ERROR);
+ }
+
+ rd_kafka_rdlock(rk);
+ preferred_rkb = rd_kafka_broker_find_by_nodeid(rk, preferred_id);
+ rd_kafka_rdunlock(rk);
+
+ if (preferred_rkb) {
+ rd_interval_reset_to_now(&rktp->rktp_lease_intvl, 0);
+ rd_kafka_toppar_lock(rktp);
+ rd_kafka_toppar_broker_update(rktp, preferred_id, preferred_rkb,
+ "preferred replica updated");
+ rd_kafka_toppar_unlock(rktp);
+ rd_kafka_broker_destroy(preferred_rkb);
+ return;
+ }
+
+ if (rd_interval_immediate(&rktp->rktp_metadata_intvl, five_seconds, 0) >
+ 0) {
+ rd_rkb_log(rkb, LOG_NOTICE, "FETCH",
+ "%.*s [%" PRId32 "]: preferred replica (%" PRId32
+ ") "
+ "is unknown: refreshing metadata",
+ RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic),
+ rktp->rktp_partition, preferred_id);
+
+ rd_kafka_metadata_refresh_brokers(
+ rktp->rktp_rkt->rkt_rk, NULL,
+ "preferred replica unavailable");
+ }
+
+ rd_kafka_toppar_fetch_backoff(rkb, rktp,
+ RD_KAFKA_RESP_ERR_REPLICA_NOT_AVAILABLE);
+}
+
+
+/**
+ * @brief Handle partition-specific Fetch error.
+ */
+static void rd_kafka_fetch_reply_handle_partition_error(
+ rd_kafka_broker_t *rkb,
+ rd_kafka_toppar_t *rktp,
+ const struct rd_kafka_toppar_ver *tver,
+ rd_kafka_resp_err_t err,
+ int64_t HighwaterMarkOffset) {
+
+ rd_rkb_dbg(rkb, FETCH, "FETCHERR",
+ "%.*s [%" PRId32 "]: Fetch failed at %s: %s",
+ RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic),
+ rktp->rktp_partition,
+ rd_kafka_fetch_pos2str(rktp->rktp_offsets.fetch_pos),
+ rd_kafka_err2name(err));
+
+ /* Some errors should be passed to the
+ * application while some handled by rdkafka */
+ switch (err) {
+ /* Errors handled by rdkafka */
+ case RD_KAFKA_RESP_ERR_OFFSET_NOT_AVAILABLE:
+ case RD_KAFKA_RESP_ERR_UNKNOWN_TOPIC_OR_PART:
+ case RD_KAFKA_RESP_ERR_LEADER_NOT_AVAILABLE:
+ case RD_KAFKA_RESP_ERR_NOT_LEADER_OR_FOLLOWER:
+ case RD_KAFKA_RESP_ERR_BROKER_NOT_AVAILABLE:
+ case RD_KAFKA_RESP_ERR_REPLICA_NOT_AVAILABLE:
+ case RD_KAFKA_RESP_ERR_KAFKA_STORAGE_ERROR:
+ case RD_KAFKA_RESP_ERR_UNKNOWN_LEADER_EPOCH:
+ case RD_KAFKA_RESP_ERR_FENCED_LEADER_EPOCH:
+ if (err == RD_KAFKA_RESP_ERR_OFFSET_NOT_AVAILABLE) {
+ /* Occurs when:
+ * - Msg exists on broker but
+ * offset > HWM, or:
+ * - HWM is >= offset, but msg not
+ * yet available at that offset
+ * (replica is out of sync).
+ * - partition leader is out of sync.
+ *
+ * Handle by requesting metadata update, changing back
+ * to the leader, and then retrying FETCH
+ * (with backoff).
+ */
+ rd_rkb_dbg(rkb, MSG, "FETCH",
+ "Topic %s [%" PRId32
+ "]: %s not "
+ "available on broker %" PRId32
+ " (leader %" PRId32
+ "): updating metadata and retrying",
+ rktp->rktp_rkt->rkt_topic->str,
+ rktp->rktp_partition,
+ rd_kafka_fetch_pos2str(
+ rktp->rktp_offsets.fetch_pos),
+ rktp->rktp_broker_id, rktp->rktp_leader_id);
+ }
+
+ if (err == RD_KAFKA_RESP_ERR_UNKNOWN_LEADER_EPOCH) {
+ rd_rkb_dbg(rkb, MSG | RD_KAFKA_DBG_CONSUMER, "FETCH",
+ "Topic %s [%" PRId32
+ "]: Fetch failed at %s: %s: broker %" PRId32
+ "has not yet caught up on latest metadata: "
+ "retrying",
+ rktp->rktp_rkt->rkt_topic->str,
+ rktp->rktp_partition,
+ rd_kafka_fetch_pos2str(
+ rktp->rktp_offsets.fetch_pos),
+ rd_kafka_err2str(err), rktp->rktp_broker_id);
+ }
+
+ if (rktp->rktp_broker_id != rktp->rktp_leader_id) {
+ rd_kafka_toppar_delegate_to_leader(rktp);
+ }
+ /* Request metadata information update*/
+ rd_kafka_toppar_leader_unavailable(rktp, "fetch", err);
+ break;
+
+ case RD_KAFKA_RESP_ERR_OFFSET_OUT_OF_RANGE: {
+ rd_kafka_fetch_pos_t err_pos;
+
+ if (rktp->rktp_broker_id != rktp->rktp_leader_id &&
+ rktp->rktp_offsets.fetch_pos.offset > HighwaterMarkOffset) {
+ rd_kafka_log(rkb->rkb_rk, LOG_WARNING, "FETCH",
+ "Topic %s [%" PRId32
+ "]: %s "
+ " out of range (HighwaterMark %" PRId64
+ " fetching from "
+ "broker %" PRId32 " (leader %" PRId32
+ "): reverting to leader",
+ rktp->rktp_rkt->rkt_topic->str,
+ rktp->rktp_partition,
+ rd_kafka_fetch_pos2str(
+ rktp->rktp_offsets.fetch_pos),
+ HighwaterMarkOffset, rktp->rktp_broker_id,
+ rktp->rktp_leader_id);
+
+ /* Out of range error cannot be taken as definitive
+ * when fetching from follower.
+ * Revert back to the leader in lieu of KIP-320.
+ */
+ rd_kafka_toppar_delegate_to_leader(rktp);
+ break;
+ }
+
+ /* Application error */
+ err_pos = rktp->rktp_offsets.fetch_pos;
+ rktp->rktp_offsets.fetch_pos.offset = RD_KAFKA_OFFSET_INVALID;
+ rktp->rktp_offsets.fetch_pos.leader_epoch = -1;
+ rd_kafka_offset_reset(rktp, rd_kafka_broker_id(rkb), err_pos,
+ err,
+ "fetch failed due to requested offset "
+ "not available on the broker");
+ } break;
+
+ case RD_KAFKA_RESP_ERR_TOPIC_AUTHORIZATION_FAILED:
+ /* If we're not authorized to access the
+ * topic mark it as errored to deny
+ * further Fetch requests. */
+ if (rktp->rktp_last_error != err) {
+ rd_kafka_consumer_err(
+ rktp->rktp_fetchq, rd_kafka_broker_id(rkb), err,
+ tver->version, NULL, rktp,
+ rktp->rktp_offsets.fetch_pos.offset,
+ "Fetch from broker %" PRId32 " failed: %s",
+ rd_kafka_broker_id(rkb), rd_kafka_err2str(err));
+ rktp->rktp_last_error = err;
+ }
+ break;
+
+
+ /* Application errors */
+ case RD_KAFKA_RESP_ERR__PARTITION_EOF:
+ if (rkb->rkb_rk->rk_conf.enable_partition_eof)
+ rd_kafka_consumer_err(
+ rktp->rktp_fetchq, rd_kafka_broker_id(rkb), err,
+ tver->version, NULL, rktp,
+ rktp->rktp_offsets.fetch_pos.offset,
+ "Fetch from broker %" PRId32
+ " reached end of "
+ "partition at offset %" PRId64
+ " (HighwaterMark %" PRId64 ")",
+ rd_kafka_broker_id(rkb),
+ rktp->rktp_offsets.fetch_pos.offset,
+ HighwaterMarkOffset);
+ break;
+
+ case RD_KAFKA_RESP_ERR_MSG_SIZE_TOO_LARGE:
+ default: /* and all other errors */
+ rd_dassert(tver->version > 0);
+ rd_kafka_consumer_err(
+ rktp->rktp_fetchq, rd_kafka_broker_id(rkb), err,
+ tver->version, NULL, rktp,
+ rktp->rktp_offsets.fetch_pos.offset,
+ "Fetch from broker %" PRId32 " failed at %s: %s",
+ rd_kafka_broker_id(rkb),
+ rd_kafka_fetch_pos2str(rktp->rktp_offsets.fetch_pos),
+ rd_kafka_err2str(err));
+ break;
+ }
+
+ /* Back off the next fetch for this partition */
+ rd_kafka_toppar_fetch_backoff(rkb, rktp, err);
+}
+
+
+
+/**
+ * @brief Per-partition FetchResponse parsing and handling.
+ *
+ * @returns an error on buffer parse failure, else RD_KAFKA_RESP_ERR_NO_ERROR.
+ */
+static rd_kafka_resp_err_t
+rd_kafka_fetch_reply_handle_partition(rd_kafka_broker_t *rkb,
+ const rd_kafkap_str_t *topic,
+ rd_kafka_topic_t *rkt /*possibly NULL*/,
+ rd_kafka_buf_t *rkbuf,
+ rd_kafka_buf_t *request,
+ int16_t ErrorCode) {
+ const int log_decode_errors = LOG_ERR;
+ struct rd_kafka_toppar_ver *tver, tver_skel;
+ rd_kafka_toppar_t *rktp = NULL;
+ rd_kafka_aborted_txns_t *aborted_txns = NULL;
+ rd_slice_t save_slice;
+ int32_t fetch_version;
+ struct {
+ int32_t Partition;
+ int16_t ErrorCode;
+ int64_t HighwaterMarkOffset;
+ int64_t LastStableOffset; /* v4 */
+ int64_t LogStartOffset; /* v5 */
+ int32_t MessageSetSize;
+ int32_t PreferredReadReplica; /* v11 */
+ } hdr;
+ rd_kafka_resp_err_t err;
+ int64_t end_offset;
+
+ rd_kafka_buf_read_i32(rkbuf, &hdr.Partition);
+ rd_kafka_buf_read_i16(rkbuf, &hdr.ErrorCode);
+ if (ErrorCode)
+ hdr.ErrorCode = ErrorCode;
+ rd_kafka_buf_read_i64(rkbuf, &hdr.HighwaterMarkOffset);
+
+ end_offset = hdr.HighwaterMarkOffset;
+
+ hdr.LastStableOffset = RD_KAFKA_OFFSET_INVALID;
+ hdr.LogStartOffset = RD_KAFKA_OFFSET_INVALID;
+ if (rd_kafka_buf_ApiVersion(request) >= 4) {
+ int32_t AbortedTxnCnt;
+ rd_kafka_buf_read_i64(rkbuf, &hdr.LastStableOffset);
+ if (rd_kafka_buf_ApiVersion(request) >= 5)
+ rd_kafka_buf_read_i64(rkbuf, &hdr.LogStartOffset);
+
+ rd_kafka_buf_read_i32(rkbuf, &AbortedTxnCnt);
+
+ if (rkb->rkb_rk->rk_conf.isolation_level ==
+ RD_KAFKA_READ_UNCOMMITTED) {
+
+ if (unlikely(AbortedTxnCnt > 0)) {
+ rd_rkb_log(rkb, LOG_ERR, "FETCH",
+ "%.*s [%" PRId32
+ "]: "
+ "%" PRId32
+ " aborted transaction(s) "
+ "encountered in READ_UNCOMMITTED "
+ "fetch response: ignoring.",
+ RD_KAFKAP_STR_PR(topic),
+ hdr.Partition, AbortedTxnCnt);
+
+ rd_kafka_buf_skip(rkbuf,
+ AbortedTxnCnt * (8 + 8));
+ }
+ } else {
+ /* Older brokers may return LSO -1,
+ * in which case we use the HWM. */
+ if (hdr.LastStableOffset >= 0)
+ end_offset = hdr.LastStableOffset;
+
+ if (AbortedTxnCnt > 0) {
+ int k;
+
+ if (unlikely(AbortedTxnCnt > 1000000))
+ rd_kafka_buf_parse_fail(
+ rkbuf,
+ "%.*s [%" PRId32
+ "]: "
+ "invalid AbortedTxnCnt %" PRId32,
+ RD_KAFKAP_STR_PR(topic),
+ hdr.Partition, AbortedTxnCnt);
+
+ aborted_txns =
+ rd_kafka_aborted_txns_new(AbortedTxnCnt);
+ for (k = 0; k < AbortedTxnCnt; k++) {
+ int64_t PID;
+ int64_t FirstOffset;
+ rd_kafka_buf_read_i64(rkbuf, &PID);
+ rd_kafka_buf_read_i64(rkbuf,
+ &FirstOffset);
+ rd_kafka_aborted_txns_add(
+ aborted_txns, PID, FirstOffset);
+ }
+ rd_kafka_aborted_txns_sort(aborted_txns);
+ }
+ }
+ }
+
+ if (rd_kafka_buf_ApiVersion(request) >= 11)
+ rd_kafka_buf_read_i32(rkbuf, &hdr.PreferredReadReplica);
+ else
+ hdr.PreferredReadReplica = -1;
+
+ rd_kafka_buf_read_i32(rkbuf, &hdr.MessageSetSize);
+
+ if (unlikely(hdr.MessageSetSize < 0))
+ rd_kafka_buf_parse_fail(
+ rkbuf,
+ "%.*s [%" PRId32 "]: invalid MessageSetSize %" PRId32,
+ RD_KAFKAP_STR_PR(topic), hdr.Partition, hdr.MessageSetSize);
+
+ /* Look up topic+partition */
+ if (likely(rkt != NULL)) {
+ rd_kafka_topic_rdlock(rkt);
+ rktp = rd_kafka_toppar_get(rkt, hdr.Partition,
+ 0 /*no ua-on-miss*/);
+ rd_kafka_topic_rdunlock(rkt);
+ }
+
+ if (unlikely(!rkt || !rktp)) {
+ rd_rkb_dbg(rkb, TOPIC, "UNKTOPIC",
+ "Received Fetch response (error %hu) for unknown "
+ "topic %.*s [%" PRId32 "]: ignoring",
+ hdr.ErrorCode, RD_KAFKAP_STR_PR(topic),
+ hdr.Partition);
+ rd_kafka_buf_skip(rkbuf, hdr.MessageSetSize);
+ if (aborted_txns)
+ rd_kafka_aborted_txns_destroy(aborted_txns);
+ return RD_KAFKA_RESP_ERR_NO_ERROR;
+ }
+
+ rd_kafka_toppar_lock(rktp);
+ rktp->rktp_lo_offset = hdr.LogStartOffset;
+ rktp->rktp_hi_offset = hdr.HighwaterMarkOffset;
+ /* Let the LastStable offset be the effective
+ * end_offset based on protocol version, that is:
+ * if connected to a broker that does not support
+ * LastStableOffset we use the HighwaterMarkOffset. */
+ rktp->rktp_ls_offset = end_offset;
+ rd_kafka_toppar_unlock(rktp);
+
+ if (hdr.PreferredReadReplica != -1) {
+
+ rd_kafka_fetch_preferred_replica_handle(
+ rktp, rkbuf, rkb, hdr.PreferredReadReplica);
+
+ if (unlikely(hdr.MessageSetSize != 0)) {
+ rd_rkb_log(rkb, LOG_WARNING, "FETCH",
+ "%.*s [%" PRId32
+ "]: Fetch response has both preferred read "
+ "replica and non-zero message set size: "
+ "%" PRId32 ": skipping messages",
+ RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic),
+ rktp->rktp_partition, hdr.MessageSetSize);
+ rd_kafka_buf_skip(rkbuf, hdr.MessageSetSize);
+ }
+
+ if (aborted_txns)
+ rd_kafka_aborted_txns_destroy(aborted_txns);
+ rd_kafka_toppar_destroy(rktp); /* from get */
+ return RD_KAFKA_RESP_ERR_NO_ERROR;
+ }
+
+ rd_kafka_toppar_lock(rktp);
+
+ /* Make sure toppar hasn't moved to another broker
+ * during the lifetime of the request. */
+ if (unlikely(rktp->rktp_broker != rkb)) {
+ rd_kafka_toppar_unlock(rktp);
+ rd_rkb_dbg(rkb, MSG, "FETCH",
+ "%.*s [%" PRId32
+ "]: partition broker has changed: "
+ "discarding fetch response",
+ RD_KAFKAP_STR_PR(topic), hdr.Partition);
+ rd_kafka_toppar_destroy(rktp); /* from get */
+ rd_kafka_buf_skip(rkbuf, hdr.MessageSetSize);
+ if (aborted_txns)
+ rd_kafka_aborted_txns_destroy(aborted_txns);
+ return RD_KAFKA_RESP_ERR_NO_ERROR;
+ }
+
+ fetch_version = rktp->rktp_fetch_version;
+ rd_kafka_toppar_unlock(rktp);
+
+ /* Check if this Fetch is for an outdated fetch version,
+ * or the original rktp was removed and a new one
+ * created (due to partition count decreasing and
+ * then increasing again, which can happen in
+ * desynchronized clusters): if so ignore it. */
+ tver_skel.rktp = rktp;
+ tver = rd_list_find(request->rkbuf_rktp_vers, &tver_skel,
+ rd_kafka_toppar_ver_cmp);
+ rd_kafka_assert(NULL, tver);
+ if (tver->rktp != rktp || tver->version < fetch_version) {
+ rd_rkb_dbg(rkb, MSG, "DROP",
+ "%s [%" PRId32
+ "]: dropping outdated fetch response "
+ "(v%d < %d or old rktp)",
+ rktp->rktp_rkt->rkt_topic->str, rktp->rktp_partition,
+ tver->version, fetch_version);
+ rd_atomic64_add(&rktp->rktp_c.rx_ver_drops, 1);
+ rd_kafka_toppar_destroy(rktp); /* from get */
+ rd_kafka_buf_skip(rkbuf, hdr.MessageSetSize);
+ if (aborted_txns)
+ rd_kafka_aborted_txns_destroy(aborted_txns);
+ return RD_KAFKA_RESP_ERR_NO_ERROR;
+ }
+
+ rd_rkb_dbg(rkb, MSG, "FETCH",
+ "Topic %.*s [%" PRId32 "] MessageSet size %" PRId32
+ ", error \"%s\", MaxOffset %" PRId64 ", LSO %" PRId64
+ ", Ver %" PRId32 "/%" PRId32,
+ RD_KAFKAP_STR_PR(topic), hdr.Partition, hdr.MessageSetSize,
+ rd_kafka_err2str(hdr.ErrorCode), hdr.HighwaterMarkOffset,
+ hdr.LastStableOffset, tver->version, fetch_version);
+
+ /* If this is the last message of the queue,
+ * signal EOF back to the application. */
+ if (end_offset == rktp->rktp_offsets.fetch_pos.offset &&
+ rktp->rktp_offsets.eof_offset != end_offset) {
+ hdr.ErrorCode = RD_KAFKA_RESP_ERR__PARTITION_EOF;
+ rktp->rktp_offsets.eof_offset = end_offset;
+ }
+
+ if (unlikely(hdr.ErrorCode != RD_KAFKA_RESP_ERR_NO_ERROR)) {
+ /* Handle partition-level errors. */
+ rd_kafka_fetch_reply_handle_partition_error(
+ rkb, rktp, tver, hdr.ErrorCode, hdr.HighwaterMarkOffset);
+
+ rd_kafka_toppar_destroy(rktp); /* from get()*/
+
+ rd_kafka_buf_skip(rkbuf, hdr.MessageSetSize);
+
+ if (aborted_txns)
+ rd_kafka_aborted_txns_destroy(aborted_txns);
+ return RD_KAFKA_RESP_ERR_NO_ERROR;
+ }
+
+ /* No error, clear any previous fetch error. */
+ rktp->rktp_last_error = RD_KAFKA_RESP_ERR_NO_ERROR;
+
+ if (unlikely(hdr.MessageSetSize <= 0)) {
+ rd_kafka_toppar_destroy(rktp); /*from get()*/
+ if (aborted_txns)
+ rd_kafka_aborted_txns_destroy(aborted_txns);
+ return RD_KAFKA_RESP_ERR_NO_ERROR;
+ }
+
+ /**
+ * Parse MessageSet
+ */
+ if (!rd_slice_narrow_relative(&rkbuf->rkbuf_reader, &save_slice,
+ (size_t)hdr.MessageSetSize))
+ rd_kafka_buf_check_len(rkbuf, hdr.MessageSetSize);
+
+ /* Parse messages */
+ err = rd_kafka_msgset_parse(rkbuf, request, rktp, aborted_txns, tver);
+
+ if (aborted_txns)
+ rd_kafka_aborted_txns_destroy(aborted_txns);
+
+ rd_slice_widen(&rkbuf->rkbuf_reader, &save_slice);
+ /* Continue with next partition regardless of
+ * parse errors (which are partition-specific) */
+
+ /* On error: back off the fetcher for this partition */
+ if (unlikely(err))
+ rd_kafka_toppar_fetch_backoff(rkb, rktp, err);
+
+ rd_kafka_toppar_destroy(rktp); /*from get()*/
+
+ return RD_KAFKA_RESP_ERR_NO_ERROR;
+
+err_parse:
+ if (rktp)
+ rd_kafka_toppar_destroy(rktp); /*from get()*/
+
+ return rkbuf->rkbuf_err;
+}
+
+/**
+ * Parses and handles a Fetch reply.
+ * Returns 0 on success or an error code on failure.
+ */
+static rd_kafka_resp_err_t
+rd_kafka_fetch_reply_handle(rd_kafka_broker_t *rkb,
+ rd_kafka_buf_t *rkbuf,
+ rd_kafka_buf_t *request) {
+ int32_t TopicArrayCnt;
+ int i;
+ const int log_decode_errors = LOG_ERR;
+ rd_kafka_topic_t *rkt = NULL;
+ int16_t ErrorCode = RD_KAFKA_RESP_ERR_NO_ERROR;
+
+ if (rd_kafka_buf_ApiVersion(request) >= 1) {
+ int32_t Throttle_Time;
+ rd_kafka_buf_read_i32(rkbuf, &Throttle_Time);
+
+ rd_kafka_op_throttle_time(rkb, rkb->rkb_rk->rk_rep,
+ Throttle_Time);
+ }
+
+ if (rd_kafka_buf_ApiVersion(request) >= 7) {
+ int32_t SessionId;
+ rd_kafka_buf_read_i16(rkbuf, &ErrorCode);
+ rd_kafka_buf_read_i32(rkbuf, &SessionId);
+ }
+
+ rd_kafka_buf_read_i32(rkbuf, &TopicArrayCnt);
+ /* Verify that TopicArrayCnt seems to be in line with remaining size */
+ rd_kafka_buf_check_len(rkbuf,
+ TopicArrayCnt * (3 /*topic min size*/ +
+ 4 /*PartitionArrayCnt*/ + 4 +
+ 2 + 8 + 4 /*inner header*/));
+
+ for (i = 0; i < TopicArrayCnt; i++) {
+ rd_kafkap_str_t topic;
+ int32_t PartitionArrayCnt;
+ int j;
+
+ rd_kafka_buf_read_str(rkbuf, &topic);
+ rd_kafka_buf_read_i32(rkbuf, &PartitionArrayCnt);
+
+ rkt = rd_kafka_topic_find0(rkb->rkb_rk, &topic);
+
+ for (j = 0; j < PartitionArrayCnt; j++) {
+ if (rd_kafka_fetch_reply_handle_partition(
+ rkb, &topic, rkt, rkbuf, request, ErrorCode))
+ goto err_parse;
+ }
+
+ if (rkt) {
+ rd_kafka_topic_destroy0(rkt);
+ rkt = NULL;
+ }
+ }
+
+ if (rd_kafka_buf_read_remain(rkbuf) != 0) {
+ rd_kafka_buf_parse_fail(rkbuf,
+ "Remaining data after message set "
+ "parse: %" PRIusz " bytes",
+ rd_kafka_buf_read_remain(rkbuf));
+ RD_NOTREACHED();
+ }
+
+ return 0;
+
+err_parse:
+ if (rkt)
+ rd_kafka_topic_destroy0(rkt);
+ rd_rkb_dbg(rkb, MSG, "BADMSG",
+ "Bad message (Fetch v%d): "
+ "is broker.version.fallback incorrectly set?",
+ (int)request->rkbuf_reqhdr.ApiVersion);
+ return rkbuf->rkbuf_err;
+}
+
+
+
+/**
+ * @broker FetchResponse handling.
+ *
+ * @locality broker thread (or any thread if err == __DESTROY).
+ */
+static void rd_kafka_broker_fetch_reply(rd_kafka_t *rk,
+ rd_kafka_broker_t *rkb,
+ rd_kafka_resp_err_t err,
+ rd_kafka_buf_t *reply,
+ rd_kafka_buf_t *request,
+ void *opaque) {
+
+ if (err == RD_KAFKA_RESP_ERR__DESTROY)
+ return; /* Terminating */
+
+ rd_kafka_assert(rkb->rkb_rk, rkb->rkb_fetching > 0);
+ rkb->rkb_fetching = 0;
+
+ /* Parse and handle the messages (unless the request errored) */
+ if (!err && reply)
+ err = rd_kafka_fetch_reply_handle(rkb, reply, request);
+
+ if (unlikely(err)) {
+ char tmp[128];
+
+ rd_rkb_dbg(rkb, MSG, "FETCH", "Fetch reply: %s",
+ rd_kafka_err2str(err));
+ switch (err) {
+ case RD_KAFKA_RESP_ERR_UNKNOWN_TOPIC_OR_PART:
+ case RD_KAFKA_RESP_ERR_LEADER_NOT_AVAILABLE:
+ case RD_KAFKA_RESP_ERR_NOT_LEADER_FOR_PARTITION:
+ case RD_KAFKA_RESP_ERR_BROKER_NOT_AVAILABLE:
+ case RD_KAFKA_RESP_ERR_REPLICA_NOT_AVAILABLE:
+ /* Request metadata information update */
+ rd_snprintf(tmp, sizeof(tmp), "FetchRequest failed: %s",
+ rd_kafka_err2str(err));
+ rd_kafka_metadata_refresh_known_topics(
+ rkb->rkb_rk, NULL, rd_true /*force*/, tmp);
+ /* FALLTHRU */
+
+ case RD_KAFKA_RESP_ERR__TRANSPORT:
+ case RD_KAFKA_RESP_ERR_REQUEST_TIMED_OUT:
+ case RD_KAFKA_RESP_ERR__MSG_TIMED_OUT:
+ /* The fetch is already intervalled from
+ * consumer_serve() so dont retry. */
+ break;
+
+ default:
+ break;
+ }
+
+ rd_kafka_broker_fetch_backoff(rkb, err);
+ /* FALLTHRU */
+ }
+}
+
+
+
+/**
+ * @brief Build and send a Fetch request message for all underflowed toppars
+ * for a specific broker.
+ *
+ * @returns the number of partitions included in the FetchRequest, if any.
+ *
+ * @locality broker thread
+ */
+int rd_kafka_broker_fetch_toppars(rd_kafka_broker_t *rkb, rd_ts_t now) {
+ rd_kafka_toppar_t *rktp;
+ rd_kafka_buf_t *rkbuf;
+ int cnt = 0;
+ size_t of_TopicArrayCnt = 0;
+ int TopicArrayCnt = 0;
+ size_t of_PartitionArrayCnt = 0;
+ int PartitionArrayCnt = 0;
+ rd_kafka_topic_t *rkt_last = NULL;
+ int16_t ApiVersion = 0;
+
+ /* Create buffer and segments:
+ * 1 x ReplicaId MaxWaitTime MinBytes TopicArrayCnt
+ * N x topic name
+ * N x PartitionArrayCnt Partition FetchOffset MaxBytes
+ * where N = number of toppars.
+ * Since we dont keep track of the number of topics served by
+ * this broker, only the partition count, we do a worst-case calc
+ * when allocating and assume each partition is on its own topic
+ */
+
+ if (unlikely(rkb->rkb_active_toppar_cnt == 0))
+ return 0;
+
+ rkbuf = rd_kafka_buf_new_request(
+ rkb, RD_KAFKAP_Fetch, 1,
+ /* ReplicaId+MaxWaitTime+MinBytes+MaxBytes+IsolationLevel+
+ * SessionId+Epoch+TopicCnt */
+ 4 + 4 + 4 + 4 + 1 + 4 + 4 + 4 +
+ /* N x PartCnt+Partition+CurrentLeaderEpoch+FetchOffset+
+ * LogStartOffset+MaxBytes+?TopicNameLen?*/
+ (rkb->rkb_active_toppar_cnt * (4 + 4 + 4 + 8 + 8 + 4 + 40)) +
+ /* ForgottenTopicsCnt */
+ 4 +
+ /* N x ForgottenTopicsData */
+ 0);
+
+ ApiVersion = rd_kafka_broker_ApiVersion_supported(rkb, RD_KAFKAP_Fetch,
+ 0, 11, NULL);
+
+ if (rkb->rkb_features & RD_KAFKA_FEATURE_MSGVER2)
+ rd_kafka_buf_ApiVersion_set(rkbuf, ApiVersion,
+ RD_KAFKA_FEATURE_MSGVER2);
+ else if (rkb->rkb_features & RD_KAFKA_FEATURE_MSGVER1)
+ rd_kafka_buf_ApiVersion_set(rkbuf, ApiVersion,
+ RD_KAFKA_FEATURE_MSGVER1);
+ else if (rkb->rkb_features & RD_KAFKA_FEATURE_THROTTLETIME)
+ rd_kafka_buf_ApiVersion_set(rkbuf, ApiVersion,
+ RD_KAFKA_FEATURE_THROTTLETIME);
+
+
+ /* FetchRequest header */
+ /* ReplicaId */
+ rd_kafka_buf_write_i32(rkbuf, -1);
+ /* MaxWaitTime */
+ rd_kafka_buf_write_i32(rkbuf, rkb->rkb_rk->rk_conf.fetch_wait_max_ms);
+ /* MinBytes */
+ rd_kafka_buf_write_i32(rkbuf, rkb->rkb_rk->rk_conf.fetch_min_bytes);
+
+ if (rd_kafka_buf_ApiVersion(rkbuf) >= 3)
+ /* MaxBytes */
+ rd_kafka_buf_write_i32(rkbuf,
+ rkb->rkb_rk->rk_conf.fetch_max_bytes);
+
+ if (rd_kafka_buf_ApiVersion(rkbuf) >= 4)
+ /* IsolationLevel */
+ rd_kafka_buf_write_i8(rkbuf,
+ rkb->rkb_rk->rk_conf.isolation_level);
+
+ if (rd_kafka_buf_ApiVersion(rkbuf) >= 7) {
+ /* SessionId */
+ rd_kafka_buf_write_i32(rkbuf, 0);
+ /* Epoch */
+ rd_kafka_buf_write_i32(rkbuf, -1);
+ }
+
+ /* Write zero TopicArrayCnt but store pointer for later update */
+ of_TopicArrayCnt = rd_kafka_buf_write_i32(rkbuf, 0);
+
+ /* Prepare map for storing the fetch version for each partition,
+ * this will later be checked in Fetch response to purge outdated
+ * responses (e.g., after a seek). */
+ rkbuf->rkbuf_rktp_vers =
+ rd_list_new(0, (void *)rd_kafka_toppar_ver_destroy);
+ rd_list_prealloc_elems(rkbuf->rkbuf_rktp_vers,
+ sizeof(struct rd_kafka_toppar_ver),
+ rkb->rkb_active_toppar_cnt, 0);
+
+ /* Round-robin start of the list. */
+ rktp = rkb->rkb_active_toppar_next;
+ do {
+ struct rd_kafka_toppar_ver *tver;
+
+ if (rkt_last != rktp->rktp_rkt) {
+ if (rkt_last != NULL) {
+ /* Update PartitionArrayCnt */
+ rd_kafka_buf_update_i32(rkbuf,
+ of_PartitionArrayCnt,
+ PartitionArrayCnt);
+ }
+
+ /* Topic name */
+ rd_kafka_buf_write_kstr(rkbuf,
+ rktp->rktp_rkt->rkt_topic);
+ TopicArrayCnt++;
+ rkt_last = rktp->rktp_rkt;
+ /* Partition count */
+ of_PartitionArrayCnt = rd_kafka_buf_write_i32(rkbuf, 0);
+ PartitionArrayCnt = 0;
+ }
+
+ PartitionArrayCnt++;
+
+ /* Partition */
+ rd_kafka_buf_write_i32(rkbuf, rktp->rktp_partition);
+
+ if (rd_kafka_buf_ApiVersion(rkbuf) >= 9) {
+ /* CurrentLeaderEpoch */
+ if (rktp->rktp_leader_epoch < 0 &&
+ rd_kafka_has_reliable_leader_epochs(rkb)) {
+ /* If current leader epoch is set to -1 and
+ * the broker has reliable leader epochs,
+ * send 0 instead, so that epoch is checked
+ * and optionally metadata is refreshed.
+ * This can happen if metadata is read initially
+ * without an existing topic (see
+ * rd_kafka_topic_metadata_update2).
+ * TODO: have a private metadata struct that
+ * stores leader epochs before topic creation.
+ */
+ rd_kafka_buf_write_i32(rkbuf, 0);
+ } else {
+ rd_kafka_buf_write_i32(rkbuf,
+ rktp->rktp_leader_epoch);
+ }
+ }
+
+ /* FetchOffset */
+ rd_kafka_buf_write_i64(rkbuf,
+ rktp->rktp_offsets.fetch_pos.offset);
+
+ if (rd_kafka_buf_ApiVersion(rkbuf) >= 5)
+ /* LogStartOffset - only used by follower replica */
+ rd_kafka_buf_write_i64(rkbuf, -1);
+
+ /* MaxBytes */
+ rd_kafka_buf_write_i32(rkbuf, rktp->rktp_fetch_msg_max_bytes);
+
+ rd_rkb_dbg(rkb, FETCH, "FETCH",
+ "Fetch topic %.*s [%" PRId32 "] at offset %" PRId64
+ " (leader epoch %" PRId32
+ ", current leader epoch %" PRId32 ", v%d)",
+ RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic),
+ rktp->rktp_partition,
+ rktp->rktp_offsets.fetch_pos.offset,
+ rktp->rktp_offsets.fetch_pos.leader_epoch,
+ rktp->rktp_leader_epoch, rktp->rktp_fetch_version);
+
+ /* We must have a valid fetch offset when we get here */
+ rd_dassert(rktp->rktp_offsets.fetch_pos.offset >= 0);
+
+ /* Add toppar + op version mapping. */
+ tver = rd_list_add(rkbuf->rkbuf_rktp_vers, NULL);
+ tver->rktp = rd_kafka_toppar_keep(rktp);
+ tver->version = rktp->rktp_fetch_version;
+
+ cnt++;
+ } while ((rktp = CIRCLEQ_LOOP_NEXT(&rkb->rkb_active_toppars, rktp,
+ rktp_activelink)) !=
+ rkb->rkb_active_toppar_next);
+
+ /* Update next toppar to fetch in round-robin list. */
+ rd_kafka_broker_active_toppar_next(
+ rkb, rktp ? CIRCLEQ_LOOP_NEXT(&rkb->rkb_active_toppars, rktp,
+ rktp_activelink)
+ : NULL);
+
+ rd_rkb_dbg(rkb, FETCH, "FETCH", "Fetch %i/%i/%i toppar(s)", cnt,
+ rkb->rkb_active_toppar_cnt, rkb->rkb_toppar_cnt);
+ if (!cnt) {
+ rd_kafka_buf_destroy(rkbuf);
+ return cnt;
+ }
+
+ if (rkt_last != NULL) {
+ /* Update last topic's PartitionArrayCnt */
+ rd_kafka_buf_update_i32(rkbuf, of_PartitionArrayCnt,
+ PartitionArrayCnt);
+ }
+
+ /* Update TopicArrayCnt */
+ rd_kafka_buf_update_i32(rkbuf, of_TopicArrayCnt, TopicArrayCnt);
+
+
+ if (rd_kafka_buf_ApiVersion(rkbuf) >= 7)
+ /* Length of the ForgottenTopics list (KIP-227). Broker
+ * use only - not used by the consumer. */
+ rd_kafka_buf_write_i32(rkbuf, 0);
+
+ if (rd_kafka_buf_ApiVersion(rkbuf) >= 11)
+ /* RackId */
+ rd_kafka_buf_write_kstr(rkbuf,
+ rkb->rkb_rk->rk_conf.client_rack);
+
+ /* Consider Fetch requests blocking if fetch.wait.max.ms >= 1s */
+ if (rkb->rkb_rk->rk_conf.fetch_wait_max_ms >= 1000)
+ rkbuf->rkbuf_flags |= RD_KAFKA_OP_F_BLOCKING;
+
+ /* Use configured timeout */
+ rd_kafka_buf_set_timeout(rkbuf,
+ rkb->rkb_rk->rk_conf.socket_timeout_ms +
+ rkb->rkb_rk->rk_conf.fetch_wait_max_ms,
+ now);
+
+ /* Sort toppar versions for quicker lookups in Fetch response. */
+ rd_list_sort(rkbuf->rkbuf_rktp_vers, rd_kafka_toppar_ver_cmp);
+
+ rkb->rkb_fetching = 1;
+ rd_kafka_broker_buf_enq1(rkb, rkbuf, rd_kafka_broker_fetch_reply, NULL);
+
+ return cnt;
+}
+
+
+
+/**
+ * @brief Decide whether this toppar should be on the fetch list or not.
+ *
+ * Also:
+ * - update toppar's op version (for broker thread's copy)
+ * - finalize statistics (move rktp_offsets to rktp_offsets_fin)
+ *
+ * @returns the partition's Fetch backoff timestamp, or 0 if no backoff.
+ *
+ * @locality broker thread
+ * @locks none
+ */
+rd_ts_t rd_kafka_toppar_fetch_decide(rd_kafka_toppar_t *rktp,
+ rd_kafka_broker_t *rkb,
+ int force_remove) {
+ int should_fetch = 1;
+ const char *reason = "";
+ int32_t version;
+ rd_ts_t ts_backoff = 0;
+ rd_bool_t lease_expired = rd_false;
+
+ rd_kafka_toppar_lock(rktp);
+
+ /* Check for preferred replica lease expiry */
+ lease_expired = rktp->rktp_leader_id != rktp->rktp_broker_id &&
+ rd_interval(&rktp->rktp_lease_intvl,
+ 5 * 60 * 1000 * 1000 /*5 minutes*/, 0) > 0;
+ if (lease_expired) {
+ /* delete_to_leader() requires no locks to be held */
+ rd_kafka_toppar_unlock(rktp);
+ rd_kafka_toppar_delegate_to_leader(rktp);
+ rd_kafka_toppar_lock(rktp);
+
+ reason = "preferred replica lease expired";
+ should_fetch = 0;
+ goto done;
+ }
+
+ /* Forced removal from fetch list */
+ if (unlikely(force_remove)) {
+ reason = "forced removal";
+ should_fetch = 0;
+ goto done;
+ }
+
+ if (unlikely((rktp->rktp_flags & RD_KAFKA_TOPPAR_F_REMOVE) != 0)) {
+ reason = "partition removed";
+ should_fetch = 0;
+ goto done;
+ }
+
+ /* Skip toppars not in active fetch state */
+ if (rktp->rktp_fetch_state != RD_KAFKA_TOPPAR_FETCH_ACTIVE) {
+ reason = "not in active fetch state";
+ should_fetch = 0;
+ goto done;
+ }
+
+ /* Update broker thread's fetch op version */
+ version = rktp->rktp_op_version;
+ if (version > rktp->rktp_fetch_version ||
+ rd_kafka_fetch_pos_cmp(&rktp->rktp_next_fetch_start,
+ &rktp->rktp_last_next_fetch_start) ||
+ rktp->rktp_offsets.fetch_pos.offset == RD_KAFKA_OFFSET_INVALID) {
+ /* New version barrier, something was modified from the
+ * control plane. Reset and start over.
+ * Alternatively only the next_offset changed but not the
+ * barrier, which is the case when automatically triggering
+ * offset.reset (such as on PARTITION_EOF or
+ * OFFSET_OUT_OF_RANGE). */
+
+ rd_kafka_dbg(
+ rktp->rktp_rkt->rkt_rk, TOPIC, "FETCHDEC",
+ "Topic %s [%" PRId32
+ "]: fetch decide: "
+ "updating to version %d (was %d) at %s "
+ "(was %s)",
+ rktp->rktp_rkt->rkt_topic->str, rktp->rktp_partition,
+ version, rktp->rktp_fetch_version,
+ rd_kafka_fetch_pos2str(rktp->rktp_next_fetch_start),
+ rd_kafka_fetch_pos2str(rktp->rktp_offsets.fetch_pos));
+
+ rd_kafka_offset_stats_reset(&rktp->rktp_offsets);
+
+ /* New start offset */
+ rktp->rktp_offsets.fetch_pos = rktp->rktp_next_fetch_start;
+ rktp->rktp_last_next_fetch_start = rktp->rktp_next_fetch_start;
+
+ rktp->rktp_fetch_version = version;
+
+ /* Clear last error to propagate new fetch
+ * errors if encountered. */
+ rktp->rktp_last_error = RD_KAFKA_RESP_ERR_NO_ERROR;
+
+ rd_kafka_q_purge_toppar_version(rktp->rktp_fetchq, rktp,
+ version);
+ }
+
+
+ if (RD_KAFKA_TOPPAR_IS_PAUSED(rktp)) {
+ should_fetch = 0;
+ reason = "paused";
+
+ } else if (RD_KAFKA_OFFSET_IS_LOGICAL(
+ rktp->rktp_next_fetch_start.offset)) {
+ should_fetch = 0;
+ reason = "no concrete offset";
+
+ } else if (rd_kafka_q_len(rktp->rktp_fetchq) >=
+ rkb->rkb_rk->rk_conf.queued_min_msgs) {
+ /* Skip toppars who's local message queue is already above
+ * the lower threshold. */
+ reason = "queued.min.messages exceeded";
+ should_fetch = 0;
+
+ } else if ((int64_t)rd_kafka_q_size(rktp->rktp_fetchq) >=
+ rkb->rkb_rk->rk_conf.queued_max_msg_bytes) {
+ reason = "queued.max.messages.kbytes exceeded";
+ should_fetch = 0;
+
+ } else if (rktp->rktp_ts_fetch_backoff > rd_clock()) {
+ reason = "fetch backed off";
+ ts_backoff = rktp->rktp_ts_fetch_backoff;
+ should_fetch = 0;
+ }
+
+done:
+ /* Copy offset stats to finalized place holder. */
+ rktp->rktp_offsets_fin = rktp->rktp_offsets;
+
+ if (rktp->rktp_fetch != should_fetch) {
+ rd_rkb_dbg(
+ rkb, FETCH, "FETCH",
+ "Topic %s [%" PRId32
+ "] in state %s at %s "
+ "(%d/%d msgs, %" PRId64
+ "/%d kb queued, "
+ "opv %" PRId32 ") is %s%s",
+ rktp->rktp_rkt->rkt_topic->str, rktp->rktp_partition,
+ rd_kafka_fetch_states[rktp->rktp_fetch_state],
+ rd_kafka_fetch_pos2str(rktp->rktp_next_fetch_start),
+ rd_kafka_q_len(rktp->rktp_fetchq),
+ rkb->rkb_rk->rk_conf.queued_min_msgs,
+ rd_kafka_q_size(rktp->rktp_fetchq) / 1024,
+ rkb->rkb_rk->rk_conf.queued_max_msg_kbytes,
+ rktp->rktp_fetch_version,
+ should_fetch ? "fetchable" : "not fetchable: ", reason);
+
+ if (should_fetch) {
+ rd_dassert(rktp->rktp_fetch_version > 0);
+ rd_kafka_broker_active_toppar_add(
+ rkb, rktp, *reason ? reason : "fetchable");
+ } else {
+ rd_kafka_broker_active_toppar_del(rkb, rktp, reason);
+ }
+ }
+
+ rd_kafka_toppar_unlock(rktp);
+
+ /* Non-fetching partitions will have an
+ * indefinate backoff, unless explicitly specified. */
+ if (!should_fetch && !ts_backoff)
+ ts_backoff = RD_TS_MAX;
+
+ return ts_backoff;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-31 14:04:08 +0000