private PulsarClient closePulsarClient(String clusterId) {
        LOGGER.info("start to close pulsar client id = {}", clusterId);
        PulsarClient client = pulsarClients.remove(clusterId);
        try {
            if (client != null) {
                client.close();
            }
        } catch (Exception e) {
            LOGGER.error("close pulsar client failed, client id = {}", clusterId);
        }
        return client;
    }
Inlong manager that maintain the single topic fetchers.
It is suitable to the cases that each topic has its own configurations.
And each consumer only consume the very one topic.
InlongMultiTopicManager was used since 1.9.0
inlong-sdk/sort-sdk/src/main/java/org/apache/inlong/sdk/sort/manager/InlongTopicManager.java