Meta {foo=bar}

Meta {_nats.req.level=0, _nats.ver=2.11.8, _nats.level=1, foo=bar}

java.lang.IllegalArgumentException: [SUB-90016] Existing consumer cannot be modified. Changed fields: [metadata]

private static final String STREAM = "stream1409";
private static final String SUBJECT = "subject1409";
private static final String CONSUMER_NAME = "name1409";
private static final String SERVER = "nats://localhost:4222";

public static void main(String[] args) throws JetStreamApiException, InterruptedException, IOException {
    Options options = Options.builder().server(SERVER).build();
    try (Connection nc = Nats.connect(options)) {
        JetStreamManagement jsm = nc.jetStreamManagement();

        if (nc.getServerInfo().isOlderThanVersion("2.11")) {
            try {
                jsm.deleteStream(STREAM);
            }
            catch (Exception ignore) {
            }

            try {
                jsm.addStream(StreamConfiguration.builder()
                    .name(STREAM)
                    .storageType(StorageType.File)
                    .subjects(SUBJECT)
                    .build());
            }
            catch (Exception e) {
                System.err.println("Fatal error, cannot create stream.");
                System.exit(-1);
            }
        }

        Map<String, String> meta = new HashMap<>();
        meta.put("foo", "bar");
        ConsumerConfiguration cc = ConsumerConfiguration.builder()
            .durable(CONSUMER_NAME)
            .metadata(meta)
            .build();
        PushSubscribeOptions pso = PushSubscribeOptions.builder()
            .stream(STREAM)
            .name(CONSUMER_NAME)
            .configuration(cc).build();

        JetStream js = jsm.jetStream();
        JetStreamSubscription sub = js.subscribe(null, pso);
        ConsumerInfo ci = sub.getConsumerInfo();
        System.out.println("Meta " + ci.getConsumerConfiguration().getMetadata());
    }
}