SessionKiller::Result killSessionsLocal(OperationContext* opCtx,
const SessionKiller::Matcher& matcher,
SessionKiller::UniformRandomBitGenerator* urbg) {
killSessionsLocalKillTransactions(opCtx, matcher);
uassertStatusOK(killSessionsLocalKillOps(opCtx, matcher));
killSessionsLocalKillCursors(opCtx, matcher);
return {std::vector<HostAndPort>{}};
}
void FeatureCompatibilityVersion::onInsertOrUpdate(OperationContext* opCtx, const BSONObj& doc) {
auto idElement = doc["_id"];
if (idElement.type() != BSONType::String ||
idElement.String() != FeatureCompatibilityVersionParser::kParameterName) {
return;
}
auto newVersion = uassertStatusOK(FeatureCompatibilityVersionParser::parse(doc));
// To avoid extra log messages when the targetVersion is set/unset, only log when the version
// changes.
bool isDifferent = serverGlobalParams.featureCompatibility.isVersionInitialized()
? serverGlobalParams.featureCompatibility.getVersion() != newVersion
: true;
if (isDifferent) {
log() << "setting featureCompatibilityVersion to "
<< FeatureCompatibilityVersionParser::toString(newVersion);
}
opCtx->recoveryUnit()->onCommit([opCtx, newVersion](boost::optional<Timestamp>) {
serverGlobalParams.featureCompatibility.setVersion(newVersion);
updateMinWireVersion();
if (newVersion != ServerGlobalParams::FeatureCompatibility::Version::kFullyDowngradedTo36) {
// Close all incoming connections from internal clients with binary versions lower than
// ours.
opCtx->getServiceContext()->getServiceEntryPoint()->endAllSessions(
transport::Session::kLatestVersionInternalClientKeepOpen |
transport::Session::kExternalClientKeepOpen);
// Close all outgoing connections to servers with binary versions lower than ours.
executor::EgressTagCloserManager::get(opCtx->getServiceContext())
.dropConnections(transport::Session::kKeepOpen);
}
if (newVersion != ServerGlobalParams::FeatureCompatibility::Version::kFullyUpgradedTo40) {
// Transactions are only allowed when the featureCompatibilityVersion is 4.0, so abort
// any open transactions when downgrading featureCompatibilityVersion.
SessionKiller::Matcher matcherAllSessions(
KillAllSessionsByPatternSet{makeKillAllSessionsByPattern(opCtx)});
killSessionsLocalKillTransactions(opCtx, matcherAllSessions);
}
});
}
