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/**
* Copyright (C) 2018-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/handle_request_response.h"
namespace mongo {
BSONObj getErrorLabels(const OperationSessionInfoFromClient& sessionOptions,
const std::string& commandName,
ErrorCodes::Error code,
bool hasWriteConcernError) {
// By specifying "autocommit", the user indicates they want to run a transaction.
// It is always false when set.
if (!sessionOptions.getAutocommit()) {
return {};
}
// The errors that indicate the transaction fails without any persistent side-effect.
bool isTransientTransactionError = code == ErrorCodes::WriteConflict //
|| code == ErrorCodes::SnapshotUnavailable //
|| code == ErrorCodes::LockTimeout //
|| code == ErrorCodes::PreparedTransactionInProgress;
if (commandName == "commitTransaction") {
// NoSuchTransaction is determined based on the data. It's safe to retry the whole
// transaction, only if the data cannot be rolled back.
isTransientTransactionError |=
code == ErrorCodes::NoSuchTransaction && !hasWriteConcernError;
} else {
bool isRetryable = ErrorCodes::isNotMasterError(code) || ErrorCodes::isShutdownError(code);
// For commands other than "commitTransaction", we know there's no side-effect for these
// errors, but it's not true for "commitTransaction" if a failover happens.
isTransientTransactionError |= isRetryable || code == ErrorCodes::NoSuchTransaction;
}
if (isTransientTransactionError) {
return BSON("errorLabels" << BSON_ARRAY("TransientTransactionError"));
}
return {};
}
} // namespace mongo
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