Files
scylladb/streaming/consumer.cc
Benny Halevy 2e93996473 streaming: make_streaming_consumer: close reader on errors
Currently, if e.g. find_column_family throws an error,
as seen in #8776 when the table was dropped during repair,
the reader is not closed.

Use a coroutine to simplify error handling and
close the reader if an exception is caught.

Also, catch an error inside the lambda passed to make_interposer_consumer
when making the shared_sstable for streaming, and close the reader
their and return an exceptional future early, since
the reader will not be moved to sst->write_components, that assumes
ownership over it and closes it in all cases.

Fixes #8776

Test: unit(dev)
Signed-off-by: Benny Halevy <bhalevy@scylladb.com>
2021-06-08 08:50:46 +03:00

93 lines
4.2 KiB
C++

/*
* Copyright (C) 2021-present 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 <seastar/core/coroutine.hh>
#include "consumer.hh"
#include "mutation_source_metadata.hh"
#include "service/priority_manager.hh"
#include "db/view/view_update_generator.hh"
#include "db/view/view_update_checks.hh"
#include "sstables/sstables.hh"
#include "sstables/sstables_manager.hh"
namespace streaming {
std::function<future<> (flat_mutation_reader)> make_streaming_consumer(sstring origin,
sharded<database>& db,
sharded<db::system_distributed_keyspace>& sys_dist_ks,
sharded<db::view::view_update_generator>& vug,
uint64_t estimated_partitions,
stream_reason reason,
sstables::offstrategy offstrategy) {
return [&db, &sys_dist_ks, &vug, estimated_partitions, reason, offstrategy, origin = std::move(origin)] (flat_mutation_reader reader) -> future<> {
std::exception_ptr ex;
try {
auto cf = db.local().find_column_family(reader.schema()).shared_from_this();
auto use_view_update_path = co_await db::view::check_needs_view_update_path(sys_dist_ks.local(), *cf, reason);
//FIXME: for better estimations this should be transmitted from remote
auto metadata = mutation_source_metadata{};
auto& cs = cf->get_compaction_strategy();
const auto adjusted_estimated_partitions = cs.adjust_partition_estimate(metadata, estimated_partitions);
auto consumer = cs.make_interposer_consumer(metadata,
[cf = std::move(cf), adjusted_estimated_partitions, use_view_update_path, &vug, origin = std::move(origin), offstrategy, reason] (flat_mutation_reader reader) {
sstables::shared_sstable sst;
try {
sst = use_view_update_path ? cf->make_streaming_staging_sstable() : cf->make_streaming_sstable_for_write();
} catch (...) {
return current_exception_as_future().finally([reader = std::move(reader)] () mutable {
return reader.close();
});
}
schema_ptr s = reader.schema();
auto& pc = service::get_local_streaming_priority();
return sst->write_components(std::move(reader), adjusted_estimated_partitions, s,
cf->get_sstables_manager().configure_writer(origin),
encoding_stats{}, pc).then([sst] {
return sst->open_data();
}).then([cf, sst, offstrategy, reason] {
if (offstrategy && (reason == stream_reason::repair)) {
sstables::sstlog.debug("Enabled automatic off-strategy trigger for table {}.{}",
cf->schema()->ks_name(), cf->schema()->cf_name());
cf->enable_off_strategy_trigger();
}
return cf->add_sstable_and_update_cache(sst, offstrategy);
}).then([cf, s, sst, use_view_update_path, &vug]() mutable -> future<> {
if (!use_view_update_path) {
return make_ready_future<>();
}
return vug.local().register_staging_sstable(sst, std::move(cf));
});
});
co_return co_await consumer(std::move(reader));
} catch (...) {
ex = std::current_exception();
}
if (ex) {
co_await reader.close();
std::rethrow_exception(std::move(ex));
}
};
}
}