https://s3.amazonaws.com/clickhouse-test-reports/0/10dc83b7a9c18228c4a4fc0dcfe6b18d2427462e/stress_test__debug__actions_.html

I found weird exception while investigating why ephemeral nodes were not removed for a long time:
https://pastila.nl/?00ec9776/d8858e442f8453f9b9e31a2f1da3cc8b
{
        Poco::Util::AbstractConfiguration::Keys keys;
        config.keys(config_name, keys);
        session_timeout_ms = Coordination::DEFAULT_SESSION_TIMEOUT_MS;
        operation_timeout_ms = Coordination::DEFAULT_OPERATION_TIMEOUT_MS;
        implementation = "zookeeper";
        for (const auto & key : keys)
        {
            if (startsWith(key, "node"))
            {
                hosts.push_back(
                        (config.getBool(config_name + "." + key + ".secure", false) ? "secure://" : "") +
                        config.getString(config_name + "." + key + ".host") + ":"
                        + config.getString(config_name + "." + key + ".port", "2181")
                );
            }
            else if (key == "session_timeout_ms")
            {
                session_timeout_ms = config.getInt(config_name + "." + key);
            }
            else if (key == "operation_timeout_ms")
            {
                operation_timeout_ms = config.getInt(config_name + "." + key);
            }
            else if (key == "identity")
            {
                identity = config.getString(config_name + "." + key);
            }
            else if (key == "root")
            {