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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/platform/basic.h"
#include <climits>
#include "mongo/db/repl/member_data.h"
#include "mongo/logv2/log.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kReplication
namespace mongo {
namespace repl {
MemberData::MemberData() : _health(-1), _authIssue(false), _configIndex(-1), _isSelf(false) {
_lastResponse.setState(MemberState::RS_UNKNOWN);
_lastResponse.setElectionTime(Timestamp());
_lastResponse.setAppliedOpTimeAndWallTime(OpTimeAndWallTime());
}
MemberData::HeartbeatChanges MemberData::setUpValues(Date_t now,
ReplSetHeartbeatResponse&& hbResponse) {
_health = 1;
if (_upSince == Date_t()) {
_upSince = now;
}
_authIssue = false;
_lastHeartbeat = now;
_lastUpdate = now;
_lastUpdateStale = false;
_updatedSinceRestart = true;
_lastHeartbeatMessage.clear();
if (!hbResponse.hasState()) {
hbResponse.setState(MemberState::RS_UNKNOWN);
}
if (!hbResponse.hasElectionTime()) {
hbResponse.setElectionTime(_lastResponse.getElectionTime());
}
if (!hbResponse.hasAppliedOpTime()) {
hbResponse.setAppliedOpTimeAndWallTime(_lastResponse.getAppliedOpTimeAndWallTime());
}
// Log if the state changes
const bool memberStateChanged = _lastResponse.getState() != hbResponse.getState();
if (memberStateChanged) {
LOGV2(21215,
"Member {hostAndPort} is now in state {newState}",
"Member is in new state",
"hostAndPort"_attr = _hostAndPort.toString(),
"newState"_attr = hbResponse.getState().toString());
}
bool opTimeAdvanced =
advanceLastAppliedOpTimeAndWallTime(hbResponse.getAppliedOpTimeAndWallTime(), now);
auto durableOpTimeAndWallTime = hbResponse.hasDurableOpTime()
? hbResponse.getDurableOpTimeAndWallTime()
: OpTimeAndWallTime();
opTimeAdvanced =
advanceLastDurableOpTimeAndWallTime(durableOpTimeAndWallTime, now) || opTimeAdvanced;
bool configChanged = (getConfigVersionAndTerm() < hbResponse.getConfigVersionAndTerm());
_configTerm = hbResponse.getConfigTerm();
_configVersion = hbResponse.getConfigVersion();
_lastResponse = std::move(hbResponse);
return {opTimeAdvanced, configChanged, memberStateChanged};
}
void MemberData::setDownValues(Date_t now, const std::string& heartbeatMessage) {
_health = 0;
_upSince = Date_t();
_lastHeartbeat = now;
_authIssue = false;
_updatedSinceRestart = true;
_lastHeartbeatMessage = heartbeatMessage;
if (_lastResponse.getState() != MemberState::RS_DOWN) {
LOGV2(21216,
"Member {hostAndPort} is now in state DOWN - {heartbeatMessage}",
"Member is now in state DOWN",
"hostAndPort"_attr = _hostAndPort.toString(),
"heartbeatMessage"_attr = redact(heartbeatMessage));
}
_lastResponse = ReplSetHeartbeatResponse();
_lastResponse.setState(MemberState::RS_DOWN);
_lastResponse.setElectionTime(Timestamp());
_lastResponse.setAppliedOpTimeAndWallTime(OpTimeAndWallTime());
_lastResponse.setSyncingTo(HostAndPort());
// The _lastAppliedOpTime/_lastDurableOpTime fields don't get cleared merely by missing a
// heartbeat.
}
void MemberData::setAuthIssue(Date_t now) {
_health = 0; // set health to 0 so that this doesn't count towards majority.
_upSince = Date_t();
_lastHeartbeat = now;
_authIssue = true;
_updatedSinceRestart = true;
_lastHeartbeatMessage.clear();
if (_lastResponse.getState() != MemberState::RS_UNKNOWN) {
LOGV2(21217,
"Member {hostAndPort} is now in state UNKNOWN due to authentication issue.",
"Member is now in state UNKNOWN due to authentication issue",
"hostAndPort"_attr = _hostAndPort.toString());
}
_lastResponse = ReplSetHeartbeatResponse();
_lastResponse.setState(MemberState::RS_UNKNOWN);
_lastResponse.setElectionTime(Timestamp());
_lastResponse.setAppliedOpTimeAndWallTime(OpTimeAndWallTime());
_lastResponse.setSyncingTo(HostAndPort());
}
void MemberData::setLastAppliedOpTimeAndWallTime(OpTimeAndWallTime opTime, Date_t now) {
invariant(opTime.opTime.isNull() || opTime.wallTime > Date_t());
_lastUpdate = now;
_lastUpdateStale = false;
_lastAppliedOpTime = opTime.opTime;
_lastAppliedWallTime = opTime.wallTime;
}
void MemberData::setLastDurableOpTimeAndWallTime(OpTimeAndWallTime opTime, Date_t now) {
invariant(opTime.opTime.isNull() || opTime.wallTime > Date_t());
_lastUpdate = now;
_lastUpdateStale = false;
// Since _lastDurableOpTime is set asynchronously from _lastAppliedOpTime, it is possible that
// 'opTime' is ahead of _lastAppliedOpTime.
if (_lastAppliedOpTime >= opTime.opTime) {
_lastDurableOpTime = opTime.opTime;
_lastDurableWallTime = opTime.wallTime;
}
}
bool MemberData::advanceLastAppliedOpTimeAndWallTime(OpTimeAndWallTime opTime, Date_t now) {
invariant(opTime.opTime.isNull() || opTime.wallTime > Date_t());
_lastUpdate = now;
_lastUpdateStale = false;
if (_lastAppliedOpTime < opTime.opTime) {
setLastAppliedOpTimeAndWallTime(opTime, now);
return true;
}
return false;
}
bool MemberData::advanceLastDurableOpTimeAndWallTime(OpTimeAndWallTime opTime, Date_t now) {
invariant(opTime.opTime.isNull() || opTime.wallTime > Date_t());
_lastUpdate = now;
_lastUpdateStale = false;
if (_lastDurableOpTime < opTime.opTime) {
_lastDurableOpTime = opTime.opTime;
_lastDurableWallTime = opTime.wallTime;
return true;
}
return false;
}
} // namespace repl
} // namespace mongo
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