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scylladb/streaming/stream_session.cc
Asias He cc0b4d249b streaming: Send error code from the sender to receiver 
In case of error on the sender side, the sender does not propagate the
error to the receiver. The sender will close the stream. As a result,
the receiver will get nullopt from the source in
get_next_mutation_fragment and pass mutation_fragment_opt with no value
to the generating_reader. In turn, the generating_reader generates end
of stream. However, the last element that the generating_reader has
generated can be any type of mutation_fragment. This makes the sstable
that consumes the generating_reader violates the mutation_fragment
stream rule.

To fix, we need to propagate the error. However RPC streaming does not
support propagate the error in the framework. User has to send an error
code explicitly.

Fixes: #4789
(cherry picked from commit bac987e32a)

streaming: Move stream_mutation_fragments_cmd to a new file

Avoid including the stream_session.hh in messaging_service.hh.

More importantly, fix the build because currently messaging_service.cc
and messaging_service.hh does not include stream_mutation_fragments_cmd.
I am not sure why it builds on my machine. Spotted this when backporting
the change to 3.0 branch.

Refs: #4789
(cherry picked from commit 49a73aa2fc)

streaming: Do not call rpc stream flush in send_mutation_fragments

The stream close() guarantees the data sent will be flushed. No need to
call the stream flush() since the stream is not reused.

Follow up fix for commit bac987e32a (streaming: Send error code from
the sender to receiver).

Fixes: #4789
(cherry picked from commit 288371ce75)
Message-Id: <87058e290ae3f59f874b860121786b22f24957c7.1565189319.git.asias@scylladb.com>
2019-08-08 11:41:25 +02:00

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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Modified by ScyllaDB
* Copyright (C) 2015 ScyllaDB
*/
/*
* This file is part of Scylla.
*
* Scylla is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Scylla is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
*/
#include "log.hh"
#include "message/messaging_service.hh"
#include "streaming/stream_session.hh"
#include "streaming/prepare_message.hh"
#include "streaming/stream_result_future.hh"
#include "streaming/stream_manager.hh"
#include "mutation_reader.hh"
#include "dht/i_partitioner.hh"
#include "database.hh"
#include "utils/fb_utilities.hh"
#include "streaming/stream_plan.hh"
#include "core/sleep.hh"
#include "service/storage_service.hh"
#include "core/thread.hh"
#include "cql3/query_processor.hh"
#include "streaming/stream_state.hh"
#include "streaming/stream_session_state.hh"
#include "streaming/stream_exception.hh"
#include "service/storage_proxy.hh"
#include "service/priority_manager.hh"
#include "query-request.hh"
#include "schema_registry.hh"
#include "multishard_writer.hh"
#include "sstables/sstables.hh"
#include "db/system_keyspace.hh"
#include <boost/algorithm/cxx11/any_of.hpp>
#include <boost/range/adaptor/map.hpp>
#include "streaming/stream_mutation_fragments_cmd.hh"
namespace streaming {
logging::logger sslog("stream_session");
/*
* This reader takes a get_next_fragment generator that produces mutation_fragment_opt which is returned by
* generating_reader.
*
*/
class generating_reader final : public flat_mutation_reader::impl {
std::function<future<mutation_fragment_opt> ()> _get_next_fragment;
public:
generating_reader(schema_ptr s, std::function<future<mutation_fragment_opt> ()> get_next_fragment)
: impl(std::move(s)), _get_next_fragment(std::move(get_next_fragment))
{ }
virtual future<> fill_buffer(db::timeout_clock::time_point) override {
return do_until([this] { return is_end_of_stream() || is_buffer_full(); }, [this] {
return _get_next_fragment().then([this] (mutation_fragment_opt mopt) {
if (!mopt) {
_end_of_stream = true;
} else {
push_mutation_fragment(std::move(*mopt));
}
});
});
}
virtual void next_partition() override {
throw std::bad_function_call();
}
virtual future<> fast_forward_to(const dht::partition_range&, db::timeout_clock::time_point) override {
throw std::bad_function_call();
}
virtual future<> fast_forward_to(position_range, db::timeout_clock::time_point) override {
throw std::bad_function_call();
}
};
static auto get_stream_result_future(utils::UUID plan_id) {
auto& sm = get_local_stream_manager();
auto f = sm.get_sending_stream(plan_id);
if (!f) {
f = sm.get_receiving_stream(plan_id);
}
return f;
}
static auto get_session(utils::UUID plan_id, gms::inet_address from, const char* verb, std::experimental::optional<utils::UUID> cf_id = {}) {
if (cf_id) {
sslog.debug("[Stream #{}] GOT {} from {}: cf_id={}", plan_id, verb, from, *cf_id);
} else {
sslog.debug("[Stream #{}] GOT {} from {}", plan_id, verb, from);
}
auto sr = get_stream_result_future(plan_id);
if (!sr) {
auto err = sprint("[Stream #%s] GOT %s from %s: Can not find stream_manager", plan_id, verb, from);
sslog.debug(err.c_str());
throw std::runtime_error(err);
}
auto coordinator = sr->get_coordinator();
if (!coordinator) {
auto err = sprint("[Stream #%s] GOT %s from %s: Can not find coordinator", plan_id, verb, from);
sslog.debug(err.c_str());
throw std::runtime_error(err);
}
return coordinator->get_or_create_session(from);
}
static future<bool> check_view_build_ongoing(db::system_distributed_keyspace& sys_dist_ks, const sstring& ks_name, const sstring& cf_name) {
return sys_dist_ks.view_status(ks_name, cf_name).then([] (std::unordered_map<utils::UUID, sstring>&& view_statuses) {
return boost::algorithm::any_of(view_statuses | boost::adaptors::map_values, [] (const sstring& view_status) {
return view_status == "STARTED";
});
});
}
static future<bool> check_needs_view_update_path(db::system_distributed_keyspace& sys_dist_ks, const table& t, stream_reason reason) {
if (is_internal_keyspace(t.schema()->ks_name())) {
return make_ready_future<bool>(false);
}
if (reason == stream_reason::repair && !t.views().empty()) {
return make_ready_future<bool>(true);
}
return do_with(t.views(), [&sys_dist_ks] (auto& views) {
return map_reduce(views,
[&sys_dist_ks] (const view_ptr& view) { return check_view_build_ongoing(sys_dist_ks, view->ks_name(), view->cf_name()); },
false,
std::logical_or<bool>());
});
}
void stream_session::init_messaging_service_handler() {
ms().register_prepare_message([] (const rpc::client_info& cinfo, prepare_message msg, UUID plan_id, sstring description, rpc::optional<stream_reason> reason_opt) {
const auto& src_cpu_id = cinfo.retrieve_auxiliary<uint32_t>("src_cpu_id");
const auto& from = cinfo.retrieve_auxiliary<gms::inet_address>("baddr");
auto dst_cpu_id = engine().cpu_id();
auto reason = reason_opt ? *reason_opt : stream_reason::unspecified;
return smp::submit_to(dst_cpu_id, [msg = std::move(msg), plan_id, description = std::move(description), from, src_cpu_id, dst_cpu_id, reason] () mutable {
auto sr = stream_result_future::init_receiving_side(plan_id, description, from);
auto session = get_session(plan_id, from, "PREPARE_MESSAGE");
session->init(sr);
session->dst_cpu_id = src_cpu_id;
session->set_reason(reason);
return session->prepare(std::move(msg.requests), std::move(msg.summaries));
});
});
ms().register_prepare_done_message([] (const rpc::client_info& cinfo, UUID plan_id, unsigned dst_cpu_id) {
const auto& from = cinfo.retrieve_auxiliary<gms::inet_address>("baddr");
return smp::submit_to(dst_cpu_id, [plan_id, from] () mutable {
auto session = get_session(plan_id, from, "PREPARE_DONE_MESSAGE");
session->follower_start_sent();
return make_ready_future<>();
});
});
ms().register_stream_mutation([] (const rpc::client_info& cinfo, UUID plan_id, frozen_mutation fm, unsigned dst_cpu_id, rpc::optional<bool> fragmented_opt, rpc::optional<stream_reason> reason_opt) {
auto from = netw::messaging_service::get_source(cinfo);
auto src_cpu_id = from.cpu_id;
auto fragmented = fragmented_opt && *fragmented_opt;
auto reason = reason_opt ? *reason_opt: stream_reason::unspecified;
sslog.trace("Got stream_mutation from {} reason {}", from, int(reason));
return smp::submit_to(src_cpu_id % smp::count, [fm = std::move(fm), plan_id, from, fragmented] () mutable {
return do_with(std::move(fm), [plan_id, from, fragmented] (const auto& fm) {
auto fm_size = fm.representation().size();
get_local_stream_manager().update_progress(plan_id, from.addr, progress_info::direction::IN, fm_size);
return service::get_schema_for_write(fm.schema_version(), from).then([plan_id, from, &fm, fragmented] (schema_ptr s) {
auto cf_id = fm.column_family_id();
sslog.debug("[Stream #{}] GOT STREAM_MUTATION from {}: cf_id={}", plan_id, from.addr, cf_id);
auto& db = service::get_local_storage_proxy().get_db().local();
if (!db.column_family_exists(cf_id)) {
sslog.warn("[Stream #{}] STREAM_MUTATION from {}: cf_id={} is missing, assume the table is dropped",
plan_id, from.addr, cf_id);
return make_ready_future<>();
}
return service::get_storage_proxy().local().mutate_streaming_mutation(std::move(s), plan_id, fm, fragmented).then_wrapped([plan_id, cf_id, from] (auto&& f) {
try {
f.get();
return make_ready_future<>();
} catch (no_such_column_family&) {
sslog.warn("[Stream #{}] STREAM_MUTATION from {}: cf_id={} is missing, assume the table is dropped",
plan_id, from.addr, cf_id);
return make_ready_future<>();
} catch (...) {
throw;
}
return make_ready_future<>();
});
});
});
});
});
ms().register_stream_mutation_fragments([] (const rpc::client_info& cinfo, UUID plan_id, UUID schema_id, UUID cf_id, uint64_t estimated_partitions, rpc::optional<stream_reason> reason_opt, rpc::source<frozen_mutation_fragment, rpc::optional<stream_mutation_fragments_cmd>> source) {
auto from = netw::messaging_service::get_source(cinfo);
auto reason = reason_opt ? *reason_opt: stream_reason::unspecified;
sslog.trace("Got stream_mutation_fragments from {} reason {}", from, int(reason));
if (!_sys_dist_ks->local_is_initialized() || !_view_update_generator->local_is_initialized()) {
return make_exception_future<rpc::sink<int>>(std::runtime_error(format("Node {} is not fully initialized for streaming, try again later",
utils::fb_utilities::get_broadcast_address())));
}
return with_scheduling_group(service::get_local_storage_service().db().local().get_streaming_scheduling_group(), [from, estimated_partitions, plan_id, schema_id, cf_id, source, reason] () mutable {
return service::get_schema_for_write(schema_id, from).then([from, estimated_partitions, plan_id, schema_id, cf_id, source, reason] (schema_ptr s) mutable {
auto sink = ms().make_sink_for_stream_mutation_fragments(source);
struct stream_mutation_fragments_cmd_status {
bool got_cmd = false;
bool got_end_of_stream = false;
};
auto cmd_status = make_lw_shared<stream_mutation_fragments_cmd_status>();
auto get_next_mutation_fragment = [source, plan_id, from, s, cmd_status] () mutable {
return source().then([plan_id, from, s, cmd_status] (stdx::optional<std::tuple<frozen_mutation_fragment, rpc::optional<stream_mutation_fragments_cmd>>> opt) mutable {
if (opt) {
auto cmd = std::get<1>(*opt);
if (cmd) {
cmd_status->got_cmd = true;
switch (*cmd) {
case stream_mutation_fragments_cmd::mutation_fragment_data:
break;
case stream_mutation_fragments_cmd::error:
return make_exception_future<mutation_fragment_opt>(std::runtime_error("Sender failed"));
case stream_mutation_fragments_cmd::end_of_stream:
cmd_status->got_end_of_stream = true;
return make_ready_future<mutation_fragment_opt>();
default:
return make_exception_future<mutation_fragment_opt>(std::runtime_error("Sender sent wrong cmd"));
}
}
frozen_mutation_fragment& fmf = std::get<0>(*opt);
auto sz = fmf.representation().size();
auto mf = fmf.unfreeze(*s);
streaming::get_local_stream_manager().update_progress(plan_id, from.addr, progress_info::direction::IN, sz);
return make_ready_future<mutation_fragment_opt>(std::move(mf));
} else {
// If the sender has sent stream_mutation_fragments_cmd it means it is
// a node that understands the new protocol. It must send end_of_stream
// before close the stream.
if (cmd_status->got_cmd && !cmd_status->got_end_of_stream) {
return make_exception_future<mutation_fragment_opt>(std::runtime_error("Sender did not sent end_of_stream"));
}
return make_ready_future<mutation_fragment_opt>();
}
});
};
distribute_reader_and_consume_on_shards(s, dht::global_partitioner(),
make_flat_mutation_reader<generating_reader>(s, std::move(get_next_mutation_fragment)),
[cf_id, plan_id, estimated_partitions, reason] (flat_mutation_reader reader) {
auto& cf = service::get_local_storage_service().db().local().find_column_family(cf_id);
return check_needs_view_update_path(_sys_dist_ks->local(), cf, reason).then([cf = cf.shared_from_this(), estimated_partitions, reader = std::move(reader)] (bool use_view_update_path) mutable {
sstables::shared_sstable sst = use_view_update_path ? cf->make_streaming_staging_sstable() : cf->make_streaming_sstable_for_write();
schema_ptr s = reader.schema();
sstables::sstable_writer_config sst_cfg;
sst_cfg.large_partition_handler = cf->get_large_partition_handler();
auto& pc = service::get_local_streaming_write_priority();
return sst->write_components(std::move(reader), std::max(1ul, estimated_partitions), s, sst_cfg, {}, pc).then([sst] {
return sst->open_data();
}).then([cf, sst] {
return cf->add_sstable_and_update_cache(sst);
}).then([cf, s, sst, use_view_update_path]() mutable -> future<> {
if (!use_view_update_path) {
return make_ready_future<>();
}
return _view_update_generator->local().register_staging_sstable(sst, std::move(cf));
});
});
}
).then_wrapped([s, plan_id, from, sink, estimated_partitions] (future<uint64_t> f) mutable {
int32_t status = 0;
uint64_t received_partitions = 0;
if (f.failed()) {
f.ignore_ready_future();
status = -1;
} else {
received_partitions = f.get0();
}
if (received_partitions) {
sslog.info("[Stream #{}] Write to sstable for ks={}, cf={}, estimated_partitions={}, received_partitions={}",
plan_id, s->ks_name(), s->cf_name(), estimated_partitions, received_partitions);
}
return sink(status).finally([sink] () mutable {
return sink.close();
});
}).handle_exception([s, plan_id, from, sink] (std::exception_ptr ep) {
sslog.error("[Stream #{}] Failed to handle STREAM_MUTATION_FRAGMENTS for ks={}, cf={}, peer={}: {}", plan_id, s->ks_name(), s->cf_name(), from.addr, ep);
});
return make_ready_future<rpc::sink<int>>(sink);
});
});
});
ms().register_stream_mutation_done([] (const rpc::client_info& cinfo, UUID plan_id, dht::token_range_vector ranges, UUID cf_id, unsigned dst_cpu_id) {
const auto& from = cinfo.retrieve_auxiliary<gms::inet_address>("baddr");
return smp::submit_to(dst_cpu_id, [ranges = std::move(ranges), plan_id, cf_id, from] () mutable {
auto session = get_session(plan_id, from, "STREAM_MUTATION_DONE", cf_id);
return session->get_db().invoke_on_all([ranges = std::move(ranges), plan_id, from, cf_id] (database& db) {
if (!db.column_family_exists(cf_id)) {
sslog.warn("[Stream #{}] STREAM_MUTATION_DONE from {}: cf_id={} is missing, assume the table is dropped",
plan_id, from, cf_id);
return make_ready_future<>();
}
dht::partition_range_vector query_ranges;
try {
auto& cf = db.find_column_family(cf_id);
query_ranges.reserve(ranges.size());
for (auto& range : ranges) {
query_ranges.push_back(dht::to_partition_range(range));
}
return cf.flush_streaming_mutations(plan_id, std::move(query_ranges));
} catch (no_such_column_family&) {
sslog.warn("[Stream #{}] STREAM_MUTATION_DONE from {}: cf_id={} is missing, assume the table is dropped",
plan_id, from, cf_id);
return make_ready_future<>();
} catch (...) {
throw;
}
}).then([session, cf_id] {
session->receive_task_completed(cf_id);
});
});
});
ms().register_complete_message([] (const rpc::client_info& cinfo, UUID plan_id, unsigned dst_cpu_id, rpc::optional<bool> failed) {
const auto& from = cinfo.retrieve_auxiliary<gms::inet_address>("baddr");
if (failed && *failed) {
return smp::submit_to(dst_cpu_id, [plan_id, from, dst_cpu_id] () {
auto session = get_session(plan_id, from, "COMPLETE_MESSAGE");
sslog.debug("[Stream #{}] COMPLETE_MESSAGE with error flag from {} dst_cpu_id={}", plan_id, from, dst_cpu_id);
session->received_failed_complete_message();
return make_ready_future<>();
});
} else {
// Be compatible with old version. Do nothing but return a ready future.
sslog.debug("[Stream #{}] COMPLETE_MESSAGE from {} dst_cpu_id={}", plan_id, from, dst_cpu_id);
return make_ready_future<>();
}
});
}
distributed<database>* stream_session::_db;
distributed<db::system_distributed_keyspace>* stream_session::_sys_dist_ks;
distributed<db::view::view_update_from_staging_generator>* stream_session::_view_update_generator;
stream_session::stream_session() = default;
stream_session::stream_session(inet_address peer_)
: peer(peer_) {
//this.metrics = StreamingMetrics.get(connecting);
}
stream_session::~stream_session() = default;
future<> stream_session::init_streaming_service(distributed<database>& db, distributed<db::system_distributed_keyspace>& sys_dist_ks, distributed<db::view::view_update_from_staging_generator>& view_update_generator) {
_db = &db;
_sys_dist_ks = &sys_dist_ks;
_view_update_generator = &view_update_generator;
// #293 - do not stop anything
// engine().at_exit([] {
// return get_stream_manager().stop();
// });
return get_stream_manager().start().then([] {
gms::get_local_gossiper().register_(get_local_stream_manager().shared_from_this());
return _db->invoke_on_all([] (auto& db) {
init_messaging_service_handler();
});
});
}
future<> stream_session::on_initialization_complete() {
// send prepare message
set_state(stream_session_state::PREPARING);
auto prepare = prepare_message();
std::copy(_requests.begin(), _requests.end(), std::back_inserter(prepare.requests));
for (auto& x : _transfers) {
prepare.summaries.emplace_back(x.second.get_summary());
}
auto id = msg_addr{this->peer, 0};
sslog.debug("[Stream #{}] SEND PREPARE_MESSAGE to {}", plan_id(), id);
return ms().send_prepare_message(id, std::move(prepare), plan_id(), description(), get_reason()).then_wrapped([this, id] (auto&& f) {
try {
auto msg = f.get0();
sslog.debug("[Stream #{}] GOT PREPARE_MESSAGE Reply from {}", this->plan_id(), this->peer);
this->dst_cpu_id = msg.dst_cpu_id;
for (auto& summary : msg.summaries) {
this->prepare_receiving(summary);
}
if (_stream_result) {
_stream_result->handle_session_prepared(this->shared_from_this());
}
} catch (...) {
sslog.warn("[Stream #{}] Fail to send PREPARE_MESSAGE to {}, {}", this->plan_id(), id, std::current_exception());
throw;
}
return make_ready_future<>();
}).then([this, id] {
auto plan_id = this->plan_id();
sslog.debug("[Stream #{}] SEND PREPARE_DONE_MESSAGE to {}", plan_id, id);
return ms().send_prepare_done_message(id, plan_id, this->dst_cpu_id).then([this] {
sslog.debug("[Stream #{}] GOT PREPARE_DONE_MESSAGE Reply from {}", this->plan_id(), this->peer);
}).handle_exception([id, plan_id] (auto ep) {
sslog.warn("[Stream #{}] Fail to send PREPARE_DONE_MESSAGE to {}, {}", plan_id, id, ep);
std::rethrow_exception(ep);
});
}).then([this] {
sslog.debug("[Stream #{}] Initiator starts to sent", this->plan_id());
this->start_streaming_files();
});
}
void stream_session::received_failed_complete_message() {
sslog.info("[Stream #{}] Received failed complete message, peer={}", plan_id(), peer);
_received_failed_complete_message = true;
close_session(stream_session_state::FAILED);
}
void stream_session::abort() {
sslog.info("[Stream #{}] Aborted stream session={}, peer={}, is_initialized={}", plan_id(), this, peer, is_initialized());
close_session(stream_session_state::FAILED);
}
void stream_session::on_error() {
sslog.warn("[Stream #{}] Streaming error occurred, peer={}", plan_id(), peer);
close_session(stream_session_state::FAILED);
}
// Only follower calls this function upon receiving of prepare_message from initiator
future<prepare_message> stream_session::prepare(std::vector<stream_request> requests, std::vector<stream_summary> summaries) {
auto plan_id = this->plan_id();
sslog.debug("[Stream #{}] prepare requests nr={}, summaries nr={}", plan_id, requests.size(), summaries.size());
// prepare tasks
set_state(stream_session_state::PREPARING);
auto& db = get_local_db();
for (auto& request : requests) {
// always flush on stream request
sslog.debug("[Stream #{}] prepare stream_request={}", plan_id, request);
auto ks = request.keyspace;
// Make sure cf requested by peer node exists
for (auto& cf : request.column_families) {
try {
db.find_column_family(ks, cf);
} catch (no_such_column_family&) {
auto err = sprint("[Stream #{}] prepare requested ks={} cf={} does not exist", ks, cf);
sslog.warn(err.c_str());
throw std::runtime_error(err);
}
}
add_transfer_ranges(request.keyspace, request.ranges, request.column_families);
}
for (auto& summary : summaries) {
sslog.debug("[Stream #{}] prepare stream_summary={}", plan_id, summary);
auto cf_id = summary.cf_id;
// Make sure cf the peer node will send to us exists
try {
db.find_column_family(cf_id);
} catch (no_such_column_family&) {
auto err = sprint("[Stream #{}] prepare cf_id=%s does not exist", plan_id, cf_id);
sslog.warn(err.c_str());
throw std::runtime_error(err);
}
prepare_receiving(summary);
}
// Always send a prepare_message back to follower
prepare_message prepare;
if (!requests.empty()) {
for (auto& x: _transfers) {
auto& task = x.second;
prepare.summaries.emplace_back(task.get_summary());
}
}
prepare.dst_cpu_id = engine().cpu_id();;
if (_stream_result) {
_stream_result->handle_session_prepared(shared_from_this());
}
return make_ready_future<prepare_message>(std::move(prepare));
}
void stream_session::follower_start_sent() {
sslog.debug("[Stream #{}] Follower start to sent", this->plan_id());
this->start_streaming_files();
}
session_info stream_session::make_session_info() {
std::vector<stream_summary> receiving_summaries;
for (auto& receiver : _receivers) {
receiving_summaries.emplace_back(receiver.second.get_summary());
}
std::vector<stream_summary> transfer_summaries;
for (auto& transfer : _transfers) {
transfer_summaries.emplace_back(transfer.second.get_summary());
}
return session_info(peer, std::move(receiving_summaries), std::move(transfer_summaries), _state);
}
void stream_session::receive_task_completed(UUID cf_id) {
_receivers.erase(cf_id);
sslog.debug("[Stream #{}] receive task_completed: cf_id={} done, stream_receive_task.size={} stream_transfer_task.size={}",
plan_id(), cf_id, _receivers.size(), _transfers.size());
maybe_completed();
}
void stream_session::transfer_task_completed(UUID cf_id) {
_transfers.erase(cf_id);
sslog.debug("[Stream #{}] transfer task_completed: cf_id={} done, stream_receive_task.size={} stream_transfer_task.size={}",
plan_id(), cf_id, _receivers.size(), _transfers.size());
maybe_completed();
}
void stream_session::transfer_task_completed_all() {
_transfers.clear();
sslog.debug("[Stream #{}] transfer task_completed: all done, stream_receive_task.size={} stream_transfer_task.size={}",
plan_id(), _receivers.size(), _transfers.size());
maybe_completed();
}
void stream_session::send_failed_complete_message() {
if (!is_initialized()) {
return;
}
auto plan_id = this->plan_id();
if (_received_failed_complete_message) {
sslog.debug("[Stream #{}] Skip sending failed message back to peer", plan_id);
return;
}
if (!_complete_sent) {
_complete_sent = true;
} else {
return;
}
auto id = msg_addr{this->peer, this->dst_cpu_id};
sslog.debug("[Stream #{}] SEND COMPLETE_MESSAGE to {}", plan_id, id);
auto session = shared_from_this();
bool failed = true;
this->ms().send_complete_message(id, plan_id, this->dst_cpu_id, failed).then([session, id, plan_id] {
sslog.debug("[Stream #{}] GOT COMPLETE_MESSAGE Reply from {}", plan_id, id.addr);
}).handle_exception([session, id, plan_id] (auto ep) {
sslog.debug("[Stream #{}] COMPLETE_MESSAGE for {} has failed: {}", plan_id, id.addr, ep);
});
}
bool stream_session::maybe_completed() {
bool completed = _receivers.empty() && _transfers.empty();
if (completed) {
sslog.debug("[Stream #{}] maybe_completed: {} -> COMPLETE: session={}, peer={}", plan_id(), _state, this, peer);
close_session(stream_session_state::COMPLETE);
}
return completed;
}
void stream_session::prepare_receiving(stream_summary& summary) {
if (summary.files > 0) {
// FIXME: handle when cf_id already exists
_receivers.emplace(summary.cf_id, stream_receive_task(shared_from_this(), summary.cf_id, summary.files, summary.total_size));
}
}
void stream_session::start_streaming_files() {
sslog.debug("[Stream #{}] {}: {} transfers to send", plan_id(), __func__, _transfers.size());
if (!_transfers.empty()) {
set_state(stream_session_state::STREAMING);
}
do_for_each(_transfers.begin(), _transfers.end(), [this] (auto& item) {
sslog.debug("[Stream #{}] Start to send cf_id={}", this->plan_id(), item.first);
return item.second.execute();
}).then([this] {
this->transfer_task_completed_all();
}).handle_exception([this] (auto ep) {
sslog.warn("[Stream #{}] Failed to send: {}", this->plan_id(), ep);
this->on_error();
});
}
std::vector<column_family*> stream_session::get_column_family_stores(const sstring& keyspace, const std::vector<sstring>& column_families) {
// if columnfamilies are not specified, we add all cf under the keyspace
std::vector<column_family*> stores;
auto& db = get_local_db();
if (column_families.empty()) {
for (auto& x : db.get_column_families()) {
column_family& cf = *(x.second);
auto cf_name = cf.schema()->cf_name();
auto ks_name = cf.schema()->ks_name();
if (ks_name == keyspace) {
sslog.debug("Find ks={} cf={}", ks_name, cf_name);
stores.push_back(&cf);
}
}
} else {
// TODO: We can move this to database class and use shared_ptr<column_family> instead
for (auto& cf_name : column_families) {
try {
auto& x = db.find_column_family(keyspace, cf_name);
stores.push_back(&x);
} catch (no_such_column_family&) {
sslog.warn("stream_session: {}.{} does not exist: {}\n", keyspace, cf_name, std::current_exception());
continue;
}
}
}
return stores;
}
void stream_session::add_transfer_ranges(sstring keyspace, dht::token_range_vector ranges, std::vector<sstring> column_families) {
auto cfs = get_column_family_stores(keyspace, column_families);
for (auto& cf : cfs) {
auto cf_id = cf->schema()->id();
auto it = _transfers.find(cf_id);
if (it == _transfers.end()) {
stream_transfer_task task(shared_from_this(), cf_id, ranges);
auto inserted = _transfers.emplace(cf_id, std::move(task)).second;
assert(inserted);
} else {
it->second.append_ranges(ranges);
}
}
}
future<> stream_session::receiving_failed(UUID cf_id)
{
return get_db().invoke_on_all([cf_id, plan_id = plan_id()] (database& db) {
try {
auto& cf = db.find_column_family(cf_id);
return cf.fail_streaming_mutations(plan_id);
} catch (no_such_column_family&) {
return make_ready_future<>();
}
});
}
void stream_session::close_session(stream_session_state final_state) {
sslog.debug("[Stream #{}] close_session session={}, state={}, is_aborted={}", plan_id(), this, final_state, _is_aborted);
if (!_is_aborted) {
_is_aborted = true;
set_state(final_state);
if (final_state == stream_session_state::FAILED) {
for (auto& x : _transfers) {
stream_transfer_task& task = x.second;
sslog.debug("[Stream #{}] close_session session={}, state={}, abort stream_transfer_task cf_id={}", plan_id(), this, final_state, task.cf_id);
task.abort();
}
for (auto& x : _receivers) {
stream_receive_task& task = x.second;
sslog.debug("[Stream #{}] close_session session={}, state={}, abort stream_receive_task cf_id={}", plan_id(), this, final_state, task.cf_id);
receiving_failed(x.first);
task.abort();
}
send_failed_complete_message();
}
// Note that we shouldn't block on this close because this method is called on the handler
// incoming thread (so we would deadlock).
//handler.close();
if (_stream_result) {
_stream_result->handle_session_complete(shared_from_this());
}
sslog.debug("[Stream #{}] close_session session={}, state={}", plan_id(), this, final_state);
}
}
void stream_session::start() {
if (_requests.empty() && _transfers.empty()) {
sslog.info("[Stream #{}] Session does not have any tasks.", plan_id());
close_session(stream_session_state::COMPLETE);
return;
}
auto connecting = netw::get_local_messaging_service().get_preferred_ip(peer);
if (peer == connecting) {
sslog.debug("[Stream #{}] Starting streaming to {}", plan_id(), peer);
} else {
sslog.debug("[Stream #{}] Starting streaming to {} through {}", plan_id(), peer, connecting);
}
on_initialization_complete().handle_exception([this] (auto ep) {
this->on_error();
});
}
bool stream_session::is_initialized() const {
return bool(_stream_result);
}
void stream_session::init(shared_ptr<stream_result_future> stream_result_) {
_stream_result = stream_result_;
}
utils::UUID stream_session::plan_id() {
return _stream_result ? _stream_result->plan_id : UUID();
}
sstring stream_session::description() {
return _stream_result ? _stream_result->description : "";
}
future<> stream_session::update_progress() {
return get_local_stream_manager().get_progress_on_all_shards(plan_id(), peer).then([this] (auto sbytes) {
auto bytes_sent = sbytes.bytes_sent;
if (bytes_sent > 0) {
auto tx = progress_info(this->peer, "txnofile", progress_info::direction::OUT, bytes_sent, bytes_sent);
_session_info.update_progress(std::move(tx));
}
auto bytes_received = sbytes.bytes_received;
if (bytes_received > 0) {
auto rx = progress_info(this->peer, "rxnofile", progress_info::direction::IN, bytes_received, bytes_received);
_session_info.update_progress(std::move(rx));
}
});
}
} // namespace streaming
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