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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.
*/
#include "mongo/platform/basic.h"
#include "mongo/s/stale_shard_version_helpers.h"
#include "mongo/logv2/log.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kSharding
namespace mongo {
namespace shard_version_retry {
void checkErrorStatusAndMaxRetries(const Status& status,
const NamespaceString& nss,
CatalogCache* catalogCache,
StringData taskDescription,
size_t numAttempts) {
auto logAndTestMaxRetries = [numAttempts, taskDescription](const Status& status) {
if (numAttempts > kMaxNumStaleVersionRetries) {
uassertStatusOKWithContext(status,
str::stream() << "Exceeded maximum number of "
<< kMaxNumStaleVersionRetries
<< " retries attempting " << taskDescription);
}
LOGV2_DEBUG(4553800,
3,
"Retrying {task_description}. Got error: {exception}",
"task_description"_attr = taskDescription,
"exception"_attr = status);
};
if (status == ErrorCodes::StaleDbVersion) {
auto staleInfo = status.extraInfo<
error_details::ErrorExtraInfoForImpl<ErrorCodes::StaleDbVersion>::type>();
invariant(staleInfo->getDb() == nss.db(),
str::stream() << "StaleDbVersion error on unexpected database. Expected "
<< nss.db() << ", received " << staleInfo->getDb());
// If the database version is stale, refresh its entry in the catalog cache.
catalogCache->onStaleDatabaseVersion(staleInfo->getDb(), staleInfo->getVersionWanted());
logAndTestMaxRetries(status);
return;
}
if (status.isA<ErrorCategory::StaleShardVersionError>()) {
// If the exception provides a shardId, add it to the set of shards requiring a refresh.
// If the cache currently considers the collection to be unsharded, this will trigger an
// epoch refresh. If no shard is provided, then the epoch is stale and we must refresh.
if (auto staleInfo = status.extraInfo<StaleConfigInfo>()) {
invariant(staleInfo->getNss() == nss,
str::stream() << "StaleConfig error on unexpected namespace. Expected " << nss
<< ", received " << staleInfo->getNss());
catalogCache->invalidateShardOrEntireCollectionEntryForShardedCollection(
nss, staleInfo->getVersionWanted(), staleInfo->getShardId());
} else {
catalogCache->invalidateCollectionEntry_LINEARIZABLE(nss);
}
logAndTestMaxRetries(status);
return;
}
if (status == ErrorCodes::ShardInvalidatedForTargeting) {
logAndTestMaxRetries(status);
return;
}
uassertStatusOK(status);
}
} // namespace shard_version_retry
} // namespace mongo
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