otmanel31 opened a new issue #8383:
URL: https://github.com/apache/pulsar/issues/8383
Hi,
**Describe the bug**
I'm trying start (in server side-back end) a consumer that should subscribe
to a topic Pattern. This consumer should be able to handle all incoming message
from all connected client ( remote client) through pulsar broker.
Until now, i worked with few remote client, no more 50 clients and 4 topics
by clients. so 200 topics.
Now, i have a lot of client (50000) * 4 = 200000 topics and i'm going to
increase this number to 300k client.
When i try (in server side back-end) to start a consumer with multi topics
subscription using a topics pattern, it seems nothing happen.
Is threre any limitations using multi topics subscription using topics
pattern with a lot of topics ?
Thanks :)
**To Reproduce**
1. Create a lot of topics. As we should subscribe to a topic pattern, create
a topic name "my-topics-<number_to_increment>"
2. Create a program that should start a client and subscribe to a broker as
following:
`
PulsarClient client = null;
try {
client = PulsarClient.builder().serviceUrl(PULSAR_HOST)
.authentication(AuthenticationFactory.token(PULSAR_TOKEN)).build();
} catch (PulsarClientException e) {
LOGGER.error("{}", Arrays.toString(e.getStackTrace()));
}
// Build consumer
Consumer<byte[]> deviceConsumer = null;
StringBuilder fullTopic = new
StringBuilder().append(PULSAR_TENANT).append("/").append(PULSAR_NAMESPACE)
.append("/").append(PULSAR_TOPIC).append("-.*");
Pattern allTopicsInNamespace =
Pattern.compile(fullTopic.toString());
try {
deviceConsumer =
Objects.requireNonNull(client).newConsumer().topicsPattern(allTopicsInNamespace)
.subscriptionName("data_subscription").subscriptionType(SubscriptionType.Shared)
.messageListener(listener).subscribe();
LOGGER.info("Created consumer on topic {}",fullTopic);
} catch (PulsarClientException e) {
LOGGER.error("Error while subscribing to topics", e);
}`
3. set log to debug level if needed
4. log info level: 2020-10-26 17:47:05,932 INFO [pulsar-client-io-1-1]
org.apache.pulsar.client.impl.ConnectionPool: [[id: 0xeedd9a3c,
L:/192.168.1.15:61572 - R:pulsar.domaine_name.local/192.168.244.189:30590]]
Connected to server
==> Nothing happen after this latest log, i'm stuck. (if needed, i can share
debug level log)
**Expected behavior**
I expect to be able to consume as if i would manage 200 topics.
**Screenshots**
If applicable, add screenshots to help explain your problem.
**Desktop (please complete the following information):**
- pulsar version: 2.6.1
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