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/**
* Copyright (C) 2008 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kReplication
#include "mongo/platform/basic.h"
#include "mongo/db/repl/initial_sync.h"
#include "mongo/db/operation_context_impl.h"
#include "mongo/db/repl/bgsync.h"
#include "mongo/db/repl/oplog.h"
#include "mongo/db/repl/optime.h"
#include "mongo/db/repl/replication_coordinator_global.h"
#include "mongo/db/repl/repl_client_info.h"
#include "mongo/util/exit.h"
#include "mongo/util/log.h"
namespace mongo {
namespace repl {
unsigned replSetForceInitialSyncFailure = 0;
InitialSync::InitialSync(BackgroundSyncInterface* q, MultiSyncApplyFunc func) : SyncTail(q, func) {}
InitialSync::~InitialSync() {}
/* initial oplog application, during initial sync, after cloning.
*/
void InitialSync::oplogApplication(OperationContext* txn, const OpTime& endOpTime) {
if (replSetForceInitialSyncFailure > 0) {
log() << "test code invoked, forced InitialSync failure: "
<< replSetForceInitialSyncFailure;
replSetForceInitialSyncFailure--;
throw DBException("forced error", 0);
}
_applyOplogUntil(txn, endOpTime);
}
/* applies oplog from "now" until endOpTime using the applier threads for initial sync*/
void InitialSync::_applyOplogUntil(OperationContext* txn, const OpTime& endOpTime) {
unsigned long long bytesApplied = 0;
unsigned long long entriesApplied = 0;
while (true) {
OpQueue ops;
auto replCoord = repl::ReplicationCoordinator::get(txn);
while (!tryPopAndWaitForMore(txn, &ops)) {
// nothing came back last time, so go again
if (ops.empty())
continue;
// Check if we reached the end
const BSONObj currentOp = ops.back().raw;
const OpTime currentOpTime =
fassertStatusOK(28772, OpTime::parseFromOplogEntry(currentOp));
// When we reach the end return this batch
if (currentOpTime == endOpTime) {
break;
} else if (currentOpTime > endOpTime) {
severe() << "Applied past expected end " << endOpTime << " to " << currentOpTime
<< " without seeing it. Rollback?";
fassertFailedNoTrace(18693);
}
// apply replication batch limits
if (ops.getSize() > replBatchLimitBytes)
break;
if (ops.getDeque().size() > replBatchLimitOperations)
break;
};
if (ops.empty()) {
severe() << "got no ops for batch...";
fassertFailedNoTrace(18692);
}
const BSONObj lastOp = ops.back().raw.getOwned();
// Tally operation information
bytesApplied += ops.getSize();
entriesApplied += ops.getDeque().size();
const OpTime lastOpTime = multiApply(txn, ops);
replCoord->setMyLastAppliedOpTime(lastOpTime);
setNewTimestamp(lastOpTime.getTimestamp());
if (inShutdown()) {
return;
}
// if the last op applied was our end, return
if (lastOpTime == endOpTime) {
LOG(1) << "SyncTail applied " << entriesApplied << " entries (" << bytesApplied
<< " bytes) and finished at opTime " << endOpTime;
return;
}
} // end of while (true)
}
} // namespace repl
} // namespace mongo
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