Hazelcast client Subscriber Issue

[Rishav Shandilya]

Hi Hazelcast Team,

We are running one node hazelcast server in one container & other container has hazelcast java client app running.

Now, client is able to connect to hazelcast cluster and play around with data but when it comes to pub/sub, it's not working.

Both pub & sub threads are in same hz java client app but published data is not being received by subscriber.

We have tried with both iTopic and iReliableTopic.

Could you please let me know what could the possible issue?

[Rishav Shandilya]

PS: We have 2 different docker containers running on same machine.

[Rishav Shandilya]

Hi Hazelcast Team,

Any suggestion on this?

We are using Hazelcast v5.1.3 for both client & server

[Josef Cacek]

Hi,
can you share a reproducer?
What if you run a simple client application like the following one?

public static void main(String[] args) {
    ClientConfig clientConfig = new ClientConfig();
    clientConfig.getNetworkConfig().addAddress("172.17.0.2");
    HazelcastInstance client = HazelcastClient.newHazelcastClient(clientConfig);

    ExecutorService ex = Executors.newFixedThreadPool(1);
    ex.submit((Runnable) () -> {
        ITopic<String> t = client.getTopic("topic");
        while (true) {
            t.publish("" + Instant.now());
            try {
                TimeUnit.SECONDS.sleep(1);
            } catch (InterruptedException e) {
            }
        }
    });
    ITopic<String> t = client.getTopic("topic");
    t.addMessageListener(msg -> System.out.println(msg.getMessageObject()));
}

Regards,

-- Josef

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[Neil Stevenson]

Same as https://stackoverflow.com/questions/73592224/hazelcast-client-subscriber-not-receiving-message ?