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/**
* Copyright (C) 2022-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/db/s/migration_batch_inserter.h"
#include "mongo/db/s/sharding_statistics.h"
#include "mongo/util/concurrency/ticketholder.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kShardingMigration
namespace mongo {
namespace {
void checkOutSessionAndVerifyTxnState(OperationContext* opCtx) {
auto mongoDSessionCatalog = MongoDSessionCatalog::get(opCtx);
mongoDSessionCatalog->checkOutUnscopedSession(opCtx);
TransactionParticipant::get(opCtx).beginOrContinue(opCtx,
{*opCtx->getTxnNumber()},
boost::none /* autocommit */,
boost::none /* startTransaction */);
}
template <typename Callable>
constexpr bool returnsVoid() {
return std::is_void_v<std::invoke_result_t<Callable>>;
}
// Yields the checked out session before running the given function. If the function runs without
// throwing, will reacquire the session and verify it is still valid to proceed with the migration.
template <typename Callable, std::enable_if_t<!returnsVoid<Callable>(), int> = 0>
auto runWithoutSession(OperationContext* opCtx, Callable callable) {
auto mongoDSessionCatalog = MongoDSessionCatalog::get(opCtx);
mongoDSessionCatalog->checkInUnscopedSession(opCtx,
OperationContextSession::CheckInReason::kYield);
auto retVal = callable();
// The below code can throw, so it cannot run in a scope guard.
opCtx->checkForInterrupt();
checkOutSessionAndVerifyTxnState(opCtx);
return retVal;
}
// Same as runWithoutSession above but takes a void function.
template <typename Callable, std::enable_if_t<returnsVoid<Callable>(), int> = 0>
void runWithoutSession(OperationContext* opCtx, Callable callable) {
auto mongoDSessionCatalog = MongoDSessionCatalog::get(opCtx);
mongoDSessionCatalog->checkInUnscopedSession(opCtx,
OperationContextSession::CheckInReason::kYield);
callable();
// The below code can throw, so it cannot run in a scope guard.
opCtx->checkForInterrupt();
checkOutSessionAndVerifyTxnState(opCtx);
}
} // namespace
void MigrationBatchInserter::onCreateThread(const std::string& threadName) {
Client::initThread(threadName, getGlobalServiceContext(), nullptr);
{
stdx::lock_guard<Client> lk(cc());
cc().setSystemOperationKillableByStepdown(lk);
}
}
void MigrationBatchInserter::run(Status status) const try {
// Run is passed in a non-ok status if this function runs inline.
// That happens if we schedule this task on a ThreadPool that is
// already shutdown. If we were to schedule a task on a shutdown ThreadPool,
// then there is a logic error in our code. Therefore, we assert that here.
invariant(status.isOK());
auto arr = _batch["objects"].Obj();
if (arr.isEmpty())
return;
auto executor =
Grid::get(_innerOpCtx->getServiceContext())->getExecutorPool()->getFixedExecutor();
auto applicationOpCtx = CancelableOperationContext(
cc().makeOperationContext(), _innerOpCtx->getCancellationToken(), executor);
auto opCtx = applicationOpCtx.get();
auto assertNotAborted = [&]() {
{
stdx::lock_guard<Client> lk(*_outerOpCtx->getClient());
_outerOpCtx->checkForInterrupt();
}
opCtx->checkForInterrupt();
};
auto it = arr.begin();
while (it != arr.end()) {
int batchNumCloned = 0;
int batchClonedBytes = 0;
const int batchMaxCloned = migrateCloneInsertionBatchSize.load();
assertNotAborted();
write_ops::InsertCommandRequest insertOp(_nss);
insertOp.getWriteCommandRequestBase().setOrdered(true);
insertOp.setDocuments([&] {
std::vector<BSONObj> toInsert;
while (it != arr.end() && (batchMaxCloned <= 0 || batchNumCloned < batchMaxCloned)) {
const auto& doc = *it;
BSONObj docToClone = doc.Obj();
toInsert.push_back(docToClone);
batchNumCloned++;
batchClonedBytes += docToClone.objsize();
++it;
}
return toInsert;
}());
{
// Disable the schema validation (during document inserts and updates)
// and any internal validation for opCtx for performInserts()
DisableDocumentValidation documentValidationDisabler(
opCtx,
DocumentValidationSettings::kDisableSchemaValidation |
DocumentValidationSettings::kDisableInternalValidation);
const auto reply =
write_ops_exec::performInserts(opCtx, insertOp, OperationSource::kFromMigrate);
for (unsigned long i = 0; i < reply.results.size(); ++i) {
uassertStatusOKWithContext(
reply.results[i],
str::stream() << "Insert of " << insertOp.getDocuments()[i] << " failed.");
}
// Revert to the original DocumentValidationSettings for opCtx
}
persistUpdatedNumOrphans(opCtx, _collectionUuid, _range, batchNumCloned);
_migrationProgress->updateMaxOptime(
repl::ReplClientInfo::forClient(opCtx->getClient()).getLastOp());
ShardingStatistics::get(opCtx).countDocsClonedOnRecipient.addAndFetch(batchNumCloned);
ShardingStatistics::get(opCtx).countBytesClonedOnRecipient.addAndFetch(batchClonedBytes);
LOGV2(6718408,
"Incrementing numCloned count by {batchNumCloned} and numClonedBytes by "
"{batchClonedBytes}",
"batchNumCloned"_attr = batchNumCloned,
"batchClonedBytes"_attr = batchClonedBytes);
_migrationProgress->incNumCloned(batchNumCloned);
_migrationProgress->incNumBytes(batchClonedBytes);
if (_writeConcern.needToWaitForOtherNodes() && _threadCount == 1) {
AdmissionContext admissionContext;
if (auto ticket = _secondaryThrottleTicket->tryAcquire(&admissionContext)) {
runWithoutSession(_outerOpCtx, [&] {
repl::ReplicationCoordinator::StatusAndDuration replStatus =
repl::ReplicationCoordinator::get(opCtx)->awaitReplication(
opCtx,
repl::ReplClientInfo::forClient(opCtx->getClient()).getLastOp(),
_writeConcern);
if (replStatus.status.code() == ErrorCodes::WriteConcernFailed) {
LOGV2_WARNING(22011,
"secondaryThrottle on, but doc insert timed out; continuing",
"migrationId"_attr = _migrationId.toBSON());
} else {
uassertStatusOK(replStatus.status);
}
});
} else {
// Ticket should always be available unless thread pool max size 1 setting is not
// being respected.
dassert(false);
}
}
sleepmillis(migrateCloneInsertionBatchDelayMS.load());
}
} catch (const DBException& e) {
stdx::lock_guard<Client> lk(*_innerOpCtx->getClient());
_innerOpCtx->getServiceContext()->killOperation(lk, _innerOpCtx, ErrorCodes::Error(6718402));
LOGV2(6718407,
"Batch application failed: {error}",
"Batch application failed",
"error"_attr = e.toStatus());
}
} // namespace mongo
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