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Posted to commits@pulsar.apache.org by GitBox <gi...@apache.org> on 2020/10/26 16:56:51 UTC
[GitHub] [pulsar] otmanel31 opened a new issue #8383: Multi topics subscription using topic pattern over lot of topics
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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[GitHub] [pulsar] sijie commented on issue #8383: Multi topics subscription using topic pattern over lot of topics
Posted by GitBox <gi...@apache.org>.
sijie commented on issue #8383:
URL: https://github.com/apache/pulsar/issues/8383#issuecomment-717523401
@lhotari Questions are encouraged in Github. Because they are searchable on the public internet rather than in Slack.
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[GitHub] [pulsar] otmanel31 commented on issue #8383: Multi topics subscription using topic pattern over lot of topics
Posted by GitBox <gi...@apache.org>.
otmanel31 commented on issue #8383:
URL: https://github.com/apache/pulsar/issues/8383#issuecomment-925796602
Wow sorry i forgot this issue ... Currently no log to provide. I 'll try to test it again asap and get more logs. :). I forgot this issue because we finally removed topics patterns notions from our code and handle list of all consumers manually
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[GitHub] [pulsar] lhotari commented on issue #8383: Multi topics subscription using topic pattern over lot of topics
Posted by GitBox <gi...@apache.org>.
lhotari commented on issue #8383:
URL: https://github.com/apache/pulsar/issues/8383#issuecomment-716974135
I don't think multi topics subscription is meant to be used for thousands of topics.
It's better to [join Pulsar Slack](https://pulsar.apache.org/en/contact/) and discuss use cases and recommended solutions there, instead of creating Github issues. Please describe your use case and ask your question on Slack instead.
Since this is not a bug, please close this issue.
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[GitHub] [pulsar] lhotari commented on issue #8383: Multi topics subscription using topic pattern over lot of topics
Posted by GitBox <gi...@apache.org>.
lhotari commented on issue #8383:
URL: https://github.com/apache/pulsar/issues/8383#issuecomment-717524306
Oh I'm really sorry about that @otmanel31 . I'm still learning the rules of Pulsar community.
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[GitHub] [pulsar] otmanel31 closed issue #8383: Multi topics subscription using topic pattern over lot of topics
Posted by GitBox <gi...@apache.org>.
otmanel31 closed issue #8383:
URL: https://github.com/apache/pulsar/issues/8383
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[GitHub] [pulsar] MarvinCai commented on issue #8383: Multi topics subscription using topic pattern over lot of topics
Posted by GitBox <gi...@apache.org>.
MarvinCai commented on issue #8383:
URL: https://github.com/apache/pulsar/issues/8383#issuecomment-718797558
can you share debug level client side log?
and it'll be better if you can also provide server side log to help diagnosing
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[GitHub] [pulsar] otmanel31 commented on issue #8383: Multi topics subscription using topic pattern over lot of topics
Posted by GitBox <gi...@apache.org>.
otmanel31 commented on issue #8383:
URL: https://github.com/apache/pulsar/issues/8383#issuecomment-717484145
question already asked in slack without any response. i close it as this is only a question
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