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rdkafka_broker.c
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rdkafka_broker.c
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/*
* librdkafka - Apache Kafka C library
*
* Copyright (c) 2012-2015, 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.
*/
#ifndef _MSC_VER
#define _GNU_SOURCE
/*
* AIX defines this and the value needs to be set correctly. For Solaris,
* src/rd.h defines _POSIX_SOURCE to be 200809L, which corresponds to XPG7,
* which itself is not compatible with _XOPEN_SOURCE on that platform.
*/
#if !defined(_AIX) && !defined(__sun)
#define _XOPEN_SOURCE
#endif
#include <signal.h>
#endif
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <ctype.h>
#include "rd.h"
#include "rdkafka_int.h"
#include "rdkafka_msg.h"
#include "rdkafka_msgset.h"
#include "rdkafka_topic.h"
#include "rdkafka_partition.h"
#include "rdkafka_broker.h"
#include "rdkafka_offset.h"
#include "rdkafka_transport.h"
#include "rdkafka_proto.h"
#include "rdkafka_buf.h"
#include "rdkafka_request.h"
#include "rdkafka_sasl.h"
#include "rdkafka_interceptor.h"
#include "rdkafka_idempotence.h"
#include "rdtime.h"
#include "rdcrc32.h"
#include "rdrand.h"
#include "rdkafka_lz4.h"
#if WITH_SSL
#include <openssl/err.h>
#endif
#include "rdendian.h"
#include "rdunittest.h"
#include "rdkafka_sasl_oauthbearer.h"
static const int rd_kafka_max_block_ms = 1000;
const char *rd_kafka_broker_state_names[] = {
"INIT",
"DOWN",
"TRY_CONNECT",
"CONNECT",
"AUTH",
"UP",
"UPDATE",
"APIVERSION_QUERY",
"AUTH_HANDSHAKE"
};
const char *rd_kafka_secproto_names[] = {
[RD_KAFKA_PROTO_PLAINTEXT] = "plaintext",
[RD_KAFKA_PROTO_SSL] = "ssl",
[RD_KAFKA_PROTO_SASL_PLAINTEXT] = "sasl_plaintext",
[RD_KAFKA_PROTO_SASL_SSL] = "sasl_ssl",
NULL
};
/**
* @returns > 0 if a connection to this broker is needed, else 0.
* @locality broker thread
* @locks none
*/
static RD_INLINE int
rd_kafka_broker_needs_connection (rd_kafka_broker_t *rkb) {
return rkb->rkb_state == RD_KAFKA_BROKER_STATE_INIT &&
(!rkb->rkb_rk->rk_conf.sparse_connections ||
rkb->rkb_persistconn.internal ||
rd_atomic32_get(&rkb->rkb_persistconn.coord));
}
static void rd_kafka_broker_handle_purge_queues (rd_kafka_broker_t *rkb,
rd_kafka_op_t *rko);
#define rd_kafka_broker_terminating(rkb) \
(rd_refcnt_get(&(rkb)->rkb_refcnt) <= 1)
/**
* Construct broker nodename.
*/
static void rd_kafka_mk_nodename (char *dest, size_t dsize,
const char *name, uint16_t port) {
rd_snprintf(dest, dsize, "%s:%hu", name, port);
}
/**
* Construct descriptive broker name
*/
static void rd_kafka_mk_brokername (char *dest, size_t dsize,
rd_kafka_secproto_t proto,
const char *nodename, int32_t nodeid,
rd_kafka_confsource_t source) {
/* Prepend protocol name to brokername, unless it is a
* standard plaintext or logical broker in which case we
* omit the protocol part. */
if (proto != RD_KAFKA_PROTO_PLAINTEXT &&
source != RD_KAFKA_LOGICAL) {
int r = rd_snprintf(dest, dsize, "%s://",
rd_kafka_secproto_names[proto]);
if (r >= (int)dsize) /* Skip proto name if it wont fit.. */
r = 0;
dest += r;
dsize -= r;
}
if (nodeid == RD_KAFKA_NODEID_UA)
rd_snprintf(dest, dsize, "%s%s",
nodename,
source == RD_KAFKA_LOGICAL ? "" :
(source == RD_KAFKA_INTERNAL ?
"/internal" : "/bootstrap"));
else
rd_snprintf(dest, dsize, "%s/%"PRId32, nodename, nodeid);
}
/**
* @brief Enable protocol feature(s) for the current broker.
*
* Locality: broker thread
*/
static void rd_kafka_broker_feature_enable (rd_kafka_broker_t *rkb,
int features) {
if (features & rkb->rkb_features)
return;
rkb->rkb_features |= features;
rd_rkb_dbg(rkb, BROKER | RD_KAFKA_DBG_PROTOCOL | RD_KAFKA_DBG_FEATURE,
"FEATURE",
"Updated enabled protocol features +%s to %s",
rd_kafka_features2str(features),
rd_kafka_features2str(rkb->rkb_features));
}
/**
* @brief Disable protocol feature(s) for the current broker.
*
* Locality: broker thread
*/
static void rd_kafka_broker_feature_disable (rd_kafka_broker_t *rkb,
int features) {
if (!(features & rkb->rkb_features))
return;
rkb->rkb_features &= ~features;
rd_rkb_dbg(rkb, BROKER | RD_KAFKA_DBG_PROTOCOL | RD_KAFKA_DBG_FEATURE,
"FEATURE",
"Updated enabled protocol features -%s to %s",
rd_kafka_features2str(features),
rd_kafka_features2str(rkb->rkb_features));
}
/**
* @brief Set protocol feature(s) for the current broker.
*
* @remark This replaces the previous feature set.
*
* @locality broker thread
* @locks rd_kafka_broker_lock()
*/
static void rd_kafka_broker_features_set (rd_kafka_broker_t *rkb, int features) {
if (rkb->rkb_features == features)
return;
rkb->rkb_features = features;
rd_rkb_dbg(rkb, BROKER, "FEATURE",
"Updated enabled protocol features to %s",
rd_kafka_features2str(rkb->rkb_features));
}
/**
* @brief Check and return supported ApiVersion for \p ApiKey.
*
* @returns the highest supported ApiVersion in the specified range (inclusive)
* or -1 if the ApiKey is not supported or no matching ApiVersion.
* The current feature set is also returned in \p featuresp
* @locks none
* @locality any
*/
int16_t rd_kafka_broker_ApiVersion_supported (rd_kafka_broker_t *rkb,
int16_t ApiKey,
int16_t minver, int16_t maxver,
int *featuresp) {
struct rd_kafka_ApiVersion skel = { .ApiKey = ApiKey };
struct rd_kafka_ApiVersion ret = RD_ZERO_INIT, *retp;
rd_kafka_broker_lock(rkb);
if (featuresp)
*featuresp = rkb->rkb_features;
if (rkb->rkb_features & RD_KAFKA_FEATURE_UNITTEST) {
/* For unit tests let the broker support everything. */
rd_kafka_broker_unlock(rkb);
return maxver;
}
retp = bsearch(&skel, rkb->rkb_ApiVersions, rkb->rkb_ApiVersions_cnt,
sizeof(*rkb->rkb_ApiVersions),
rd_kafka_ApiVersion_key_cmp);
if (retp)
ret = *retp;
rd_kafka_broker_unlock(rkb);
if (!retp)
return -1;
if (ret.MaxVer < maxver) {
if (ret.MaxVer < minver)
return -1;
else
return ret.MaxVer;
} else if (ret.MinVer > maxver)
return -1;
else
return maxver;
}
/**
* @brief Set broker state.
*
* \c rkb->rkb_state is the previous state, while
* \p state is the new state.
*
* @locks rd_kafka_broker_lock() MUST be held.
* @locality broker thread
*/
void rd_kafka_broker_set_state (rd_kafka_broker_t *rkb, int state) {
if ((int)rkb->rkb_state == state)
return;
rd_kafka_dbg(rkb->rkb_rk, BROKER, "STATE",
"%s: Broker changed state %s -> %s",
rkb->rkb_name,
rd_kafka_broker_state_names[rkb->rkb_state],
rd_kafka_broker_state_names[state]);
if (rkb->rkb_source == RD_KAFKA_INTERNAL) {
/* no-op */
} else if (state == RD_KAFKA_BROKER_STATE_DOWN &&
!rkb->rkb_down_reported &&
rkb->rkb_state != RD_KAFKA_BROKER_STATE_APIVERSION_QUERY) {
/* Propagate ALL_BROKERS_DOWN event if all brokers are
* now down, unless we're terminating.
* Dont do this if we're querying for ApiVersion since it
* is bound to fail once on older brokers. */
if (rd_atomic32_add(&rkb->rkb_rk->rk_broker_down_cnt, 1) ==
rd_atomic32_get(&rkb->rkb_rk->rk_broker_cnt) -
rd_atomic32_get(&rkb->rkb_rk->rk_broker_addrless_cnt) &&
!rd_kafka_terminating(rkb->rkb_rk))
rd_kafka_op_err(rkb->rkb_rk,
RD_KAFKA_RESP_ERR__ALL_BROKERS_DOWN,
"%i/%i brokers are down",
rd_atomic32_get(&rkb->rkb_rk->
rk_broker_down_cnt),
rd_atomic32_get(&rkb->rkb_rk->
rk_broker_cnt) -
rd_atomic32_get(&rkb->rkb_rk->
rk_broker_addrless_cnt));
rkb->rkb_down_reported = 1;
} else if (state >= RD_KAFKA_BROKER_STATE_UP &&
rkb->rkb_down_reported) {
rd_atomic32_sub(&rkb->rkb_rk->rk_broker_down_cnt, 1);
rkb->rkb_down_reported = 0;
}
if (rkb->rkb_source != RD_KAFKA_INTERNAL) {
if (rd_kafka_broker_state_is_up(state) &&
!rd_kafka_broker_state_is_up(rkb->rkb_state))
rd_atomic32_add(&rkb->rkb_rk->rk_broker_up_cnt, 1);
else if (rd_kafka_broker_state_is_up(rkb->rkb_state) &&
!rd_kafka_broker_state_is_up(state))
rd_atomic32_sub(&rkb->rkb_rk->rk_broker_up_cnt, 1);
}
rkb->rkb_state = state;
rkb->rkb_ts_state = rd_clock();
rd_kafka_brokers_broadcast_state_change(rkb->rkb_rk);
}
/**
* @brief Locks broker, acquires the states, unlocks, and returns
* the state.
* @locks !broker_lock
* @locality any
*/
int rd_kafka_broker_get_state (rd_kafka_broker_t *rkb) {
int state;
rd_kafka_broker_lock(rkb);
state = rkb->rkb_state;
rd_kafka_broker_unlock(rkb);
return state;
}
/**
* Failure propagation to application.
* Will tear down connection to broker and trigger a reconnect.
*
* If 'fmt' is NULL nothing will be logged or propagated to the application.
*
* \p level is the log level, <=LOG_INFO will be logged while =LOG_DEBUG will
* be debug-logged.
*
* Locality: Broker thread
*/
void rd_kafka_broker_fail (rd_kafka_broker_t *rkb,
int level, rd_kafka_resp_err_t err,
const char *fmt, ...) {
va_list ap;
int errno_save = errno;
rd_kafka_bufq_t tmpq_waitresp, tmpq;
int old_state;
rd_kafka_assert(rkb->rkb_rk, thrd_is_current(rkb->rkb_thread));
rd_kafka_dbg(rkb->rkb_rk, BROKER | RD_KAFKA_DBG_PROTOCOL, "BROKERFAIL",
"%s: failed: err: %s: (errno: %s)",
rkb->rkb_name, rd_kafka_err2str(err),
rd_strerror(errno_save));
rkb->rkb_err.err = errno_save;
if (rkb->rkb_transport) {
rd_kafka_transport_close(rkb->rkb_transport);
rkb->rkb_transport = NULL;
if (rkb->rkb_state >= RD_KAFKA_BROKER_STATE_UP)
rd_atomic32_add(&rkb->rkb_c.disconnects, 1);
}
rkb->rkb_req_timeouts = 0;
if (rkb->rkb_recv_buf) {
rd_kafka_buf_destroy(rkb->rkb_recv_buf);
rkb->rkb_recv_buf = NULL;
}
rd_kafka_broker_lock(rkb);
/* The caller may omit the format if it thinks this is a recurring
* failure, in which case the following things are omitted:
* - log message
* - application OP_ERR
* - metadata request
*
* Dont log anything if this was the termination signal, or if the
* socket disconnected while trying ApiVersionRequest.
*/
if (fmt &&
!(errno_save == EINTR &&
rd_kafka_terminating(rkb->rkb_rk)) &&
!(err == RD_KAFKA_RESP_ERR__TRANSPORT &&
rkb->rkb_state == RD_KAFKA_BROKER_STATE_APIVERSION_QUERY)) {
int of;
/* Insert broker name in log message if it fits. */
of = rd_snprintf(rkb->rkb_err.msg, sizeof(rkb->rkb_err.msg),
"%s: ", rkb->rkb_name);
if (of >= (int)sizeof(rkb->rkb_err.msg))
of = 0;
va_start(ap, fmt);
rd_vsnprintf(rkb->rkb_err.msg+of,
sizeof(rkb->rkb_err.msg)-of, fmt, ap);
va_end(ap);
/* Append time since last state change
* to help debug connection issues */
of = (int)strlen(rkb->rkb_err.msg);
if (of + 30 < (int)sizeof(rkb->rkb_err.msg))
rd_snprintf(rkb->rkb_err.msg+of,
sizeof(rkb->rkb_err.msg)-of,
" (after %"PRId64"ms in state %s)",
(rd_clock() - rkb->rkb_ts_state)/1000,
rd_kafka_broker_state_names[rkb->
rkb_state]);
if (level >= LOG_DEBUG)
rd_kafka_dbg(rkb->rkb_rk, BROKER, "FAIL",
"%s", rkb->rkb_err.msg);
else {
/* Don't log if an error callback is registered,
* or the error event is enabled. */
if (!(rkb->rkb_rk->rk_conf.enabled_events &
RD_KAFKA_EVENT_ERROR))
rd_kafka_log(rkb->rkb_rk, level, "FAIL",
"%s", rkb->rkb_err.msg);
/* Send ERR op back to application for processing. */
rd_kafka_op_err(rkb->rkb_rk, err,
"%s", rkb->rkb_err.msg);
}
}
/* If we're currently asking for ApiVersion and the connection
* went down it probably means the broker does not support that request
* and tore down the connection. In this case we disable that feature flag. */
if (rkb->rkb_state == RD_KAFKA_BROKER_STATE_APIVERSION_QUERY)
rd_kafka_broker_feature_disable(rkb, RD_KAFKA_FEATURE_APIVERSION);
/* Set broker state */
old_state = rkb->rkb_state;
rd_kafka_broker_set_state(rkb, RD_KAFKA_BROKER_STATE_DOWN);
/* Unlock broker since a requeue will try to lock it. */
rd_kafka_broker_unlock(rkb);
/*
* Purge all buffers
* (put bufs on a temporary queue since bufs may be requeued,
* make sure outstanding requests are re-enqueued before
* bufs on outbufs queue.)
*/
rd_kafka_bufq_init(&tmpq_waitresp);
rd_kafka_bufq_init(&tmpq);
rd_kafka_bufq_concat(&tmpq_waitresp, &rkb->rkb_waitresps);
rd_kafka_bufq_concat(&tmpq, &rkb->rkb_outbufs);
rd_atomic32_init(&rkb->rkb_blocking_request_cnt, 0);
/* Purge the in-flight buffers (might get re-enqueued in case
* of retries). */
rd_kafka_bufq_purge(rkb, &tmpq_waitresp, err);
/* Purge the waiting-in-output-queue buffers,
* might also get re-enqueued. */
rd_kafka_bufq_purge(rkb, &tmpq,
/* If failure was caused by a timeout,
* adjust the error code for in-queue requests. */
err == RD_KAFKA_RESP_ERR__TIMED_OUT ?
RD_KAFKA_RESP_ERR__TIMED_OUT_QUEUE : err);
/* Update bufq for connection reset:
* - Purge connection-setup requests from outbufs since they will be
* reissued on the next connect.
* - Reset any partially sent buffer's offset.
*/
rd_kafka_bufq_connection_reset(rkb, &rkb->rkb_outbufs);
/* Extra debugging for tracking termination-hang issues:
* show what is keeping this broker from decommissioning. */
if (rd_kafka_terminating(rkb->rkb_rk) &&
!rd_kafka_broker_terminating(rkb)) {
rd_rkb_dbg(rkb, BROKER | RD_KAFKA_DBG_PROTOCOL, "BRKTERM",
"terminating: broker still has %d refcnt(s), "
"%"PRId32" buffer(s), %d partition(s)",
rd_refcnt_get(&rkb->rkb_refcnt),
rd_kafka_bufq_cnt(&rkb->rkb_outbufs),
rkb->rkb_toppar_cnt);
rd_kafka_bufq_dump(rkb, "BRKOUTBUFS", &rkb->rkb_outbufs);
#if ENABLE_SHAREDPTR_DEBUG
if (rd_refcnt_get(&rkb->rkb_refcnt) > 1) {
rd_rkb_dbg(rkb, BROKER, "BRKTERM",
"Dumping shared pointers: "
"this broker is %p", rkb);
rd_shared_ptrs_dump();
}
#endif
}
/* Query for topic leaders to quickly pick up on failover. */
if (fmt && err != RD_KAFKA_RESP_ERR__DESTROY &&
old_state >= RD_KAFKA_BROKER_STATE_UP)
rd_kafka_metadata_refresh_known_topics(rkb->rkb_rk, NULL,
1/*force*/,
"broker down");
}
/**
* @brief Handle broker connection close.
*
* @locality broker thread
*/
void rd_kafka_broker_conn_closed (rd_kafka_broker_t *rkb,
rd_kafka_resp_err_t err,
const char *errstr) {
int log_level = LOG_ERR;
if (!rkb->rkb_rk->rk_conf.log_connection_close) {
/* Silence all connection closes */
log_level = LOG_DEBUG;
} else {
/* Silence close logs for connections that are idle,
* it is most likely the broker's idle connection
* reaper kicking in.
*
* Indications there might be an error and not an
* idle disconnect:
* - If the connection age is low a disconnect
* typically indicates a failure, such as protocol mismatch.
* - If the connection hasn't been idle long enough.
* - There are outstanding requests, or requests enqueued.
*
* For non-idle connections, adjust log level:
* - requests in-flight: LOG_WARNING
* - else: LOG_INFO
*/
rd_ts_t now = rd_clock();
rd_ts_t minidle =
RD_MAX(60*1000/*60s*/,
rkb->rkb_rk->rk_conf.socket_timeout_ms) * 1000;
int inflight = rd_kafka_bufq_cnt(&rkb->rkb_waitresps);
int inqueue = rd_kafka_bufq_cnt(&rkb->rkb_outbufs);
if (rkb->rkb_ts_state + minidle < now &&
rkb->rkb_ts_tx_last + minidle < now &&
inflight + inqueue == 0)
log_level = LOG_DEBUG;
else if (inflight > 1)
log_level = LOG_WARNING;
else
log_level = LOG_INFO;
}
rd_kafka_broker_fail(rkb, log_level, err, "%s", errstr);
}
/**
* @brief Purge requests in \p rkbq matching request \p ApiKey
* and partition \p rktp.
*
* @warning ApiKey must be RD_KAFKAP_Produce
*
* @returns the number of purged buffers.
*
* @locality broker thread
*/
static int
rd_kafka_broker_bufq_purge_by_toppar (rd_kafka_broker_t *rkb,
rd_kafka_bufq_t *rkbq,
int64_t ApiKey,
rd_kafka_toppar_t *rktp,
rd_kafka_resp_err_t err) {
rd_kafka_buf_t *rkbuf, *tmp;
int cnt = 0;
rd_assert(ApiKey == RD_KAFKAP_Produce);
TAILQ_FOREACH_SAFE(rkbuf, &rkbq->rkbq_bufs, rkbuf_link, tmp) {
if (rkbuf->rkbuf_reqhdr.ApiKey != ApiKey ||
rd_kafka_toppar_s2i(rkbuf->rkbuf_u.Produce.
batch.s_rktp) != rktp||
/* Skip partially sent buffers and let them transmit.
* The alternative would be to kill the connection here,
* which is more drastic and costly. */
rd_slice_offset(&rkbuf->rkbuf_reader) > 0)
continue;
rd_kafka_bufq_deq(rkbq, rkbuf);
rd_kafka_buf_callback(rkb->rkb_rk, rkb, err, NULL, rkbuf);
cnt++;
}
return cnt;
}
/**
* Scan bufq for buffer timeouts, trigger buffer callback on timeout.
*
* If \p partial_cntp is non-NULL any partially sent buffers will increase
* the provided counter by 1.
*
* @param ApiKey Only match requests with this ApiKey, or -1 for all.
* @param now If 0, all buffers will time out, else the current clock.
* @param description "N requests timed out <description>", e.g., "in flight".
* Only used if log_first_n > 0.
* @param log_first_n Log the first N request timeouts.
*
* @returns the number of timed out buffers.
*
* @locality broker thread
*/
static int rd_kafka_broker_bufq_timeout_scan (rd_kafka_broker_t *rkb,
int is_waitresp_q,
rd_kafka_bufq_t *rkbq,
int *partial_cntp,
int16_t ApiKey,
rd_kafka_resp_err_t err,
rd_ts_t now,
const char *description,
int log_first_n) {
rd_kafka_buf_t *rkbuf, *tmp;
int cnt = 0;
int idx = -1;
const rd_kafka_buf_t *holb = TAILQ_FIRST(&rkbq->rkbq_bufs);
TAILQ_FOREACH_SAFE(rkbuf, &rkbq->rkbq_bufs, rkbuf_link, tmp) {
idx++;
if (likely(now && rkbuf->rkbuf_ts_timeout > now))
continue;
if (ApiKey != -1 && rkbuf->rkbuf_reqhdr.ApiKey != ApiKey)
continue;
if (partial_cntp && rd_slice_offset(&rkbuf->rkbuf_reader) > 0)
(*partial_cntp)++;
/* Convert rkbuf_ts_sent to elapsed time since request */
if (rkbuf->rkbuf_ts_sent)
rkbuf->rkbuf_ts_sent = now - rkbuf->rkbuf_ts_sent;
else
rkbuf->rkbuf_ts_sent = now - rkbuf->rkbuf_ts_enq;
rd_kafka_bufq_deq(rkbq, rkbuf);
if (now && cnt < log_first_n) {
char holbstr[128];
/* Head of line blocking:
* If this is not the first request in queue, but the
* initial first request did not time out,
* it typically means the first request is a
* long-running blocking one, holding up the
* sub-sequent requests.
* In this case log what is likely holding up the
* requests and what caused this request to time out. */
if (holb && holb == TAILQ_FIRST(&rkbq->rkbq_bufs)) {
rd_snprintf(holbstr, sizeof(holbstr),
": possibly held back by "
"preceeding%s %sRequest with "
"timeout in %dms",
(holb->rkbuf_flags &
RD_KAFKA_OP_F_BLOCKING) ?
" blocking" : "",
rd_kafka_ApiKey2str(holb->
rkbuf_reqhdr.
ApiKey),
(int)((holb->rkbuf_ts_timeout -
now) / 1000));
/* Only log the HOLB once */
holb = NULL;
} else {
*holbstr = '\0';
}
rd_rkb_log(rkb, LOG_NOTICE, "REQTMOUT",
"Timed out %sRequest %s "
"(after %"PRId64"ms, timeout #%d)%s",
rd_kafka_ApiKey2str(rkbuf->rkbuf_reqhdr.
ApiKey),
description, rkbuf->rkbuf_ts_sent/1000, cnt,
holbstr);
}
if (is_waitresp_q && rkbuf->rkbuf_flags & RD_KAFKA_OP_F_BLOCKING
&& rd_atomic32_sub(&rkb->rkb_blocking_request_cnt, 1) == 0)
rd_kafka_brokers_broadcast_state_change(rkb->rkb_rk);
rd_kafka_buf_callback(rkb->rkb_rk, rkb, err, NULL, rkbuf);
cnt++;
}
return cnt;
}
/**
* Scan the wait-response and outbuf queues for message timeouts.
*
* Locality: Broker thread
*/
static void rd_kafka_broker_timeout_scan (rd_kafka_broker_t *rkb, rd_ts_t now) {
int inflight_cnt, retry_cnt, outq_cnt;
int partial_cnt = 0;
rd_kafka_assert(rkb->rkb_rk, thrd_is_current(rkb->rkb_thread));
/* In-flight requests waiting for response */
inflight_cnt = rd_kafka_broker_bufq_timeout_scan(
rkb, 1, &rkb->rkb_waitresps, NULL, -1,
RD_KAFKA_RESP_ERR__TIMED_OUT, now, "in flight", 5);
/* Requests in retry queue */
retry_cnt = rd_kafka_broker_bufq_timeout_scan(
rkb, 0, &rkb->rkb_retrybufs, NULL, -1,
RD_KAFKA_RESP_ERR__TIMED_OUT_QUEUE, now, "in retry queue", 0);
/* Requests in local queue not sent yet.
* partial_cnt is included in outq_cnt and denotes a request
* that has been partially transmitted. */
outq_cnt = rd_kafka_broker_bufq_timeout_scan(
rkb, 0, &rkb->rkb_outbufs, &partial_cnt, -1,
RD_KAFKA_RESP_ERR__TIMED_OUT_QUEUE, now, "in output queue", 0);
if (inflight_cnt + retry_cnt + outq_cnt + partial_cnt > 0) {
rd_rkb_log(rkb, LOG_WARNING, "REQTMOUT",
"Timed out %i in-flight, %i retry-queued, "
"%i out-queue, %i partially-sent requests",
inflight_cnt, retry_cnt, outq_cnt, partial_cnt);
rkb->rkb_req_timeouts += inflight_cnt + outq_cnt;
rd_atomic64_add(&rkb->rkb_c.req_timeouts,
inflight_cnt + outq_cnt);
/* If this was a partially sent request that timed out, or the
* number of timed out requests have reached the
* socket.max.fails threshold, we need to take down the
* connection. */
if (partial_cnt > 0 ||
(rkb->rkb_rk->rk_conf.socket_max_fails &&
rkb->rkb_req_timeouts >=
rkb->rkb_rk->rk_conf.socket_max_fails &&
rkb->rkb_state >= RD_KAFKA_BROKER_STATE_UP)) {
char rttinfo[32];
/* Print average RTT (if avail) to help diagnose. */
rd_avg_calc(&rkb->rkb_avg_rtt, now);
if (rkb->rkb_avg_rtt.ra_v.avg)
rd_snprintf(rttinfo, sizeof(rttinfo),
" (average rtt %.3fms)",
(float)(rkb->rkb_avg_rtt.ra_v.avg/
1000.0f));
else
rttinfo[0] = 0;
errno = ETIMEDOUT;
rd_kafka_broker_fail(rkb, LOG_ERR,
RD_KAFKA_RESP_ERR__TIMED_OUT,
"%i request(s) timed out: "
"disconnect%s",
rkb->rkb_req_timeouts, rttinfo);
}
}
}
static ssize_t
rd_kafka_broker_send (rd_kafka_broker_t *rkb, rd_slice_t *slice) {
ssize_t r;
char errstr[128];
rd_kafka_assert(rkb->rkb_rk, rkb->rkb_state >= RD_KAFKA_BROKER_STATE_UP);
rd_kafka_assert(rkb->rkb_rk, rkb->rkb_transport);
r = rd_kafka_transport_send(rkb->rkb_transport, slice,
errstr, sizeof(errstr));
if (r == -1) {
rd_kafka_broker_fail(rkb, LOG_ERR, RD_KAFKA_RESP_ERR__TRANSPORT,
"Send failed: %s", errstr);
rd_atomic64_add(&rkb->rkb_c.tx_err, 1);
return -1;
}
rd_atomic64_add(&rkb->rkb_c.tx_bytes, r);
rd_atomic64_add(&rkb->rkb_c.tx, 1);
return r;
}
static int rd_kafka_broker_resolve (rd_kafka_broker_t *rkb,
const char *nodename) {
const char *errstr;
int save_idx = 0;
if (!*nodename && rkb->rkb_source == RD_KAFKA_LOGICAL) {
rd_kafka_broker_fail(rkb, LOG_DEBUG,
RD_KAFKA_RESP_ERR__RESOLVE,
"Logical broker has no address yet");
return -1;
}
if (rkb->rkb_rsal &&
rkb->rkb_ts_rsal_last + (rkb->rkb_rk->rk_conf.broker_addr_ttl*1000)
< rd_clock()) {
/* Address list has expired. */
/* Save the address index to make sure we still round-robin
* if we get the same address list back */
save_idx = rkb->rkb_rsal->rsal_curr;
rd_sockaddr_list_destroy(rkb->rkb_rsal);
rkb->rkb_rsal = NULL;
}
if (!rkb->rkb_rsal) {
/* Resolve */
rkb->rkb_rsal = rd_getaddrinfo(rkb->rkb_nodename,
RD_KAFKA_PORT_STR,
AI_ADDRCONFIG,
rkb->rkb_rk->rk_conf.
broker_addr_family,
SOCK_STREAM,
IPPROTO_TCP, &errstr);
if (!rkb->rkb_rsal) {
rd_kafka_broker_fail(rkb, LOG_ERR,
RD_KAFKA_RESP_ERR__RESOLVE,
/* Avoid duplicate log messages */
rkb->rkb_err.err == errno ?
NULL :
"Failed to resolve '%s': %s",
nodename, errstr);
return -1;
} else {
rkb->rkb_ts_rsal_last = rd_clock();
/* Continue at previous round-robin position */
if (rkb->rkb_rsal->rsal_cnt > save_idx)
rkb->rkb_rsal->rsal_curr = save_idx;
}
}
return 0;
}
static void rd_kafka_broker_buf_enq0 (rd_kafka_broker_t *rkb,
rd_kafka_buf_t *rkbuf) {
rd_ts_t now;
rd_kafka_assert(rkb->rkb_rk, thrd_is_current(rkb->rkb_thread));
if (rkb->rkb_rk->rk_conf.sparse_connections &&
rkb->rkb_state == RD_KAFKA_BROKER_STATE_INIT) {
/* Sparse connections:
* Trigger connection when a new request is enqueued. */
rkb->rkb_persistconn.internal++;
rd_kafka_broker_lock(rkb);
rd_kafka_broker_set_state(rkb,
RD_KAFKA_BROKER_STATE_TRY_CONNECT);
rd_kafka_broker_unlock(rkb);
}
now = rd_clock();
rkbuf->rkbuf_ts_enq = now;
rkbuf->rkbuf_flags &= ~RD_KAFKA_OP_F_SENT;
/* Calculate request attempt timeout */
rd_kafka_buf_calc_timeout(rkb->rkb_rk, rkbuf, now);
if (likely(rkbuf->rkbuf_prio == RD_KAFKA_PRIO_NORMAL)) {
/* Insert request at tail of queue */
TAILQ_INSERT_TAIL(&rkb->rkb_outbufs.rkbq_bufs,
rkbuf, rkbuf_link);
} else {
/* Insert request after any requests with a higher or
* equal priority.
* Also make sure the request is after added any partially
* sent request (of any prio).
* We need to check if buf corrid is set rather than
* rkbuf_of since SSL_write may return 0 and expect the
* exact same arguments the next call. */
rd_kafka_buf_t *prev, *after = NULL;
TAILQ_FOREACH(prev, &rkb->rkb_outbufs.rkbq_bufs, rkbuf_link) {
if (prev->rkbuf_prio < rkbuf->rkbuf_prio &&
prev->rkbuf_corrid == 0)
break;
after = prev;
}
if (after)
TAILQ_INSERT_AFTER(&rkb->rkb_outbufs.rkbq_bufs,
after, rkbuf, rkbuf_link);
else
TAILQ_INSERT_HEAD(&rkb->rkb_outbufs.rkbq_bufs,
rkbuf, rkbuf_link);
}
rd_atomic32_add(&rkb->rkb_outbufs.rkbq_cnt, 1);
if (rkbuf->rkbuf_reqhdr.ApiKey == RD_KAFKAP_Produce)
rd_atomic32_add(&rkb->rkb_outbufs.rkbq_msg_cnt,
rd_kafka_msgq_len(&rkbuf->rkbuf_batch.msgq));
}
/**
* Finalize a stuffed rkbuf for sending to broker.
*/
static void rd_kafka_buf_finalize (rd_kafka_t *rk, rd_kafka_buf_t *rkbuf) {
size_t totsize;
/* Calculate total request buffer length. */
totsize = rd_buf_len(&rkbuf->rkbuf_buf) - 4;
rd_assert(totsize <= (size_t)rk->rk_conf.max_msg_size);
/* Set up a buffer reader for sending the buffer. */
rd_slice_init_full(&rkbuf->rkbuf_reader, &rkbuf->rkbuf_buf);
/**
* Update request header fields
*/
/* Total reuqest length */
rd_kafka_buf_update_i32(rkbuf, 0, (int32_t)totsize);
/* ApiVersion */
rd_kafka_buf_update_i16(rkbuf, 4+2, rkbuf->rkbuf_reqhdr.ApiVersion);
}
void rd_kafka_broker_buf_enq1 (rd_kafka_broker_t *rkb,
rd_kafka_buf_t *rkbuf,
rd_kafka_resp_cb_t *resp_cb,
void *opaque) {
rkbuf->rkbuf_cb = resp_cb;
rkbuf->rkbuf_opaque = opaque;
rd_kafka_buf_finalize(rkb->rkb_rk, rkbuf);
rd_kafka_broker_buf_enq0(rkb, rkbuf);
}
/**
* Enqueue buffer on broker's xmit queue, but fail buffer immediately
* if broker is not up.
*
* Locality: broker thread
*/
static int rd_kafka_broker_buf_enq2 (rd_kafka_broker_t *rkb,
rd_kafka_buf_t *rkbuf) {
if (unlikely(rkb->rkb_source == RD_KAFKA_INTERNAL)) {
/* Fail request immediately if this is the internal broker. */
rd_kafka_buf_callback(rkb->rkb_rk, rkb,
RD_KAFKA_RESP_ERR__TRANSPORT,
NULL, rkbuf);
return -1;
}
rd_kafka_broker_buf_enq0(rkb, rkbuf);
return 0;
}
/**
* Enqueue buffer for tranmission.
* Responses are enqueued on 'replyq' (RD_KAFKA_OP_RECV_BUF)
*
* Locality: any thread
*/
void rd_kafka_broker_buf_enq_replyq (rd_kafka_broker_t *rkb,
rd_kafka_buf_t *rkbuf,
rd_kafka_replyq_t replyq,
rd_kafka_resp_cb_t *resp_cb,
void *opaque) {