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/**
* Copyright (C) 2020-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.
*/
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kIndex
#include "mongo/db/index/skipped_record_tracker.h"
#include "mongo/db/catalog/collection.h"
#include "mongo/db/concurrency/write_conflict_exception.h"
#include "mongo/db/curop.h"
#include "mongo/db/index/index_access_method.h"
#include "mongo/db/multi_key_path_tracker.h"
#include "mongo/db/storage/execution_context.h"
#include "mongo/logv2/log.h"
namespace mongo {
namespace {
static constexpr StringData kRecordIdField = "recordId"_sd;
}
SkippedRecordTracker::SkippedRecordTracker(IndexCatalogEntry* indexCatalogEntry)
: SkippedRecordTracker(nullptr, indexCatalogEntry, boost::none) {}
SkippedRecordTracker::SkippedRecordTracker(OperationContext* opCtx,
IndexCatalogEntry* indexCatalogEntry,
boost::optional<StringData> ident)
: _indexCatalogEntry(indexCatalogEntry) {
if (!ident) {
return;
}
// Only initialize the table when resuming an index build if an ident already exists. Otherwise,
// lazily initialize table when we record the first document.
_skippedRecordsTable =
opCtx->getServiceContext()->getStorageEngine()->makeTemporaryRecordStoreFromExistingIdent(
opCtx, ident.get());
}
void SkippedRecordTracker::keepTemporaryTable() {
if (_skippedRecordsTable) {
_skippedRecordsTable->keep();
}
}
void SkippedRecordTracker::record(OperationContext* opCtx, const RecordId& recordId) {
BSONObjBuilder builder;
recordId.serializeToken(kRecordIdField, &builder);
BSONObj toInsert = builder.obj();
// Lazily initialize table when we record the first document.
if (!_skippedRecordsTable) {
_skippedRecordsTable =
opCtx->getServiceContext()->getStorageEngine()->makeTemporaryRecordStore(
opCtx, KeyFormat::Long);
}
writeConflictRetry(
opCtx,
"recordSkippedRecordTracker",
NamespaceString::kIndexBuildEntryNamespace.ns(),
[&]() {
WriteUnitOfWork wuow(opCtx);
uassertStatusOK(
_skippedRecordsTable->rs()
->insertRecord(opCtx, toInsert.objdata(), toInsert.objsize(), Timestamp::min())
.getStatus());
wuow.commit();
});
}
bool SkippedRecordTracker::areAllRecordsApplied(OperationContext* opCtx) const {
if (!_skippedRecordsTable) {
return true;
}
auto cursor = _skippedRecordsTable->rs()->getCursor(opCtx);
auto record = cursor->next();
// The table is empty only when all writes are applied.
if (!record)
return true;
return false;
}
Status SkippedRecordTracker::retrySkippedRecords(OperationContext* opCtx,
const CollectionPtr& collection) {
dassert(opCtx->lockState()->isCollectionLockedForMode(collection->ns(), MODE_X));
if (!_skippedRecordsTable) {
return Status::OK();
}
InsertDeleteOptions options;
collection->getIndexCatalog()->prepareInsertDeleteOptions(
opCtx,
_indexCatalogEntry->getNSSFromCatalog(opCtx),
_indexCatalogEntry->descriptor(),
&options);
options.fromIndexBuilder = true;
// This should only be called when constraints are being enforced, on a primary. It does not
// make sense, nor is it necessary for this to be called on a secondary.
invariant(options.getKeysMode ==
InsertDeleteOptions::ConstraintEnforcementMode::kEnforceConstraints);
static const char* curopMessage = "Index Build: retrying skipped records";
ProgressMeterHolder progress;
{
stdx::unique_lock<Client> lk(*opCtx->getClient());
progress.set(
CurOp::get(opCtx)->setProgress_inlock(curopMessage, _skippedRecordCounter.load(), 1));
}
SharedBufferFragmentBuilder pooledBuilder(KeyString::HeapBuilder::kHeapAllocatorDefaultBytes);
auto& executionCtx = StorageExecutionContext::get(opCtx);
auto recordStore = _skippedRecordsTable->rs();
auto cursor = recordStore->getCursor(opCtx);
int resolved = 0;
while (auto record = cursor->next()) {
const BSONObj doc = record->data.toBson();
// This is the RecordId of the skipped record from the collection.
RecordId skippedRecordId = RecordId::deserializeToken(doc[kRecordIdField]);
WriteUnitOfWork wuow(opCtx);
// If the record still exists, get a potentially new version of the document to index.
auto collCursor = collection->getCursor(opCtx);
auto skippedRecord = collCursor->seekExact(skippedRecordId);
if (skippedRecord) {
const auto skippedDoc = skippedRecord->data.toBson();
LOGV2_DEBUG(23882,
2,
"reapplying skipped RecordID {skippedRecordId}: {skippedDoc}",
"skippedRecordId"_attr = skippedRecordId,
"skippedDoc"_attr = skippedDoc);
auto keys = executionCtx.keys();
auto multikeyMetadataKeys = executionCtx.multikeyMetadataKeys();
auto multikeyPaths = executionCtx.multikeyPaths();
auto iam = _indexCatalogEntry->accessMethod()->asSortedData();
try {
// Because constraint enforcement is set, this will throw if there are any indexing
// errors, instead of writing back to the skipped records table, which would
// normally happen if constraints were relaxed.
iam->getKeys(opCtx,
collection,
pooledBuilder,
skippedDoc,
options.getKeysMode,
SortedDataIndexAccessMethod::GetKeysContext::kAddingKeys,
keys.get(),
multikeyMetadataKeys.get(),
multikeyPaths.get(),
skippedRecordId);
auto status = iam->insertKeys(opCtx, collection, *keys, options, nullptr, nullptr);
if (!status.isOK()) {
return status;
}
status = iam->insertKeys(
opCtx, collection, *multikeyMetadataKeys, options, nullptr, nullptr);
if (!status.isOK()) {
return status;
}
} catch (const DBException& ex) {
return ex.toStatus();
}
if (iam->shouldMarkIndexAsMultikey(
keys->size(), *multikeyMetadataKeys, *multikeyPaths)) {
if (!_multikeyPaths) {
_multikeyPaths = *multikeyPaths;
}
MultikeyPathTracker::mergeMultikeyPaths(&_multikeyPaths.get(), *multikeyPaths);
}
}
// Delete the record so that it is not applied more than once.
recordStore->deleteRecord(opCtx, record->id);
cursor->save();
wuow.commit();
cursor->restore();
progress->hit();
resolved++;
}
progress->finished();
int logLevel = (resolved > 0) ? 0 : 1;
LOGV2_DEBUG(23883,
logLevel,
"Index build: reapplied skipped records",
"index"_attr = _indexCatalogEntry->descriptor()->indexName(),
"numResolved"_attr = resolved);
return Status::OK();
}
} // namespace mongo
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