Method startLegacyVersionMonitors

fdbclient/MultiVersionTransaction.actor.cpp:2085–2096

Starts version monitors for old client versions that don't support connect packet monitoring (<= 5.0). Must be called from the main thread

// Starts version monitors for old client versions that don't support connect packet monitoring (<= 5.0).
// Must be called from the main thread
void MultiVersionDatabase::DatabaseState::startLegacyVersionMonitors() {
	for (auto itr = legacyVersionMonitors.begin(); itr != legacyVersionMonitors.end(); ++itr) {
		while (itr != legacyVersionMonitors.end() && (*itr)->client->failed) {
			(*itr)->close();
			itr = legacyVersionMonitors.erase(itr);
		}
		if (itr != legacyVersionMonitors.end() &&
		    (!dbProtocolVersion.present() || (*itr)->client->protocolVersion != dbProtocolVersion.get())) {
			(*itr)->startConnectionMonitor(Reference<DatabaseState>::addRef(this));
		}
	}
}

// Cleans up state for the legacy version monitors to break reference cycles
void MultiVersionDatabase::DatabaseState::close() {