@Override
    public void putConnectorConfig(final String connName, final Map<String, String> config, final boolean allowReplace,
                                   final Callback<Created<ConnectorInfo>> callback) {
        putConnectorConfig(connName, config, null, allowReplace, callback);
    }
Close resources managed by this herder but which are not explicitly started.
connect/runtime/src/main/java/org/apache/kafka/connect/runtime/distributed/DistributedHerder.java