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Questions tagged [apache-pulsar]

Apache Pulsar is an open-source distributed pub-sub messaging system

339 questions
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how to rewind a subscription cursor to a specific time in Pulsar?

In the document: https://pulsar.apache.org/docs/en/concepts-clients/, it explains that you can start a consumer from earliest or latest position, or you can specify a message id. Can it support this requirement, that to specify a time point and…
Xiang Zhang
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Is it possible for Multiple Consumers to consume same message on a Pulsar Topic?

Let's say for that one has a Pulsar Producer for a persistent topic topic1 (namespace and tenant are not relevant for the question). And let's say we have multiple consumers for the same topic (topic1) with different subscription names. Is it…
Karlson
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Hazelcast Jet connector for Apache Pulsar as source

I could not find a Hazlecast Jet source connector for Apache Pulsar. Have anybody tried this? Appreciate any directions, points, sources, considerations if I have to write a custom stream connector for Pulsar as source for Jet?
vvra
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Apache Pulsar Java client taking too much memory (OOM)

I wrote a simple Apache Pulsar client with Spring boot - a pulsar-producer initialized as beans that will be used in the rest controller to publish incoming api messages to Pulsar, and a consumer that consumes message, prints some values in console…
vvra
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Is it currently possible to swap pulsar in for Kafka in spring-cloud-streams

I've been trying to do some searching (Google, Slack, Stack) and have yet to find an answer. We have some applications that are written using Spring Cloud Streams and were interested in swapping the back end from Kafka to Pulsar. Spring currently…
Jeef
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pulsar-client couldn't be installed

I cannot install pulsar-client as it is mentioned in the documentation at all: pip3 install pulsar-client Collecting pulsar-client ERROR: Could not find a version that satisfies the requirement pulsar-client (from versions: none) ERROR: No…
Gurgen Hovhannisyan
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How to design a pub/sub architecture for real-time stock price

I have an external system that publish real-time financial data(e.g. stock quote and price from exchange all over the world). This external system has some limitation on number of stocks per account connection, as we have many applications need to…
yinhua
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Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/pulsar/client/api/PulsarClient

I am trying to execute apache pulsar producer and consumer program through java, I installed apache-pulsar standalone in GCP virtual machine and started the cluster in standalone mode. Next step is I had given a maven build in windows eclipse and…
Bhagesh Arora
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How to use Apache Pulsar with Spring Cloud Stream?

There is no official library of Apache Pulsar for Spring Cloud Stream. I found Spring for Apache Pulsar, but it is only about Spring Boot. In it's GitHub repository, there is a [spring-pulsar-spring-cloud-stream-binder], but not found in…
user10200598
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Is there any Pulsar UI where messages can be updated/produced?

The only UI I found was Pulsar Manager , which don't even allow to see the messages in a topic. By any chance is there a Pulsar UI with better features where messages can be manipulated?
Sagar Panwar
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Custom Objects with Apache Pulsar and Spring Boot

I'm using Apache Pulsar for the first time but finding it hard to publish and listen to custom objects. I have defined schemas as directed by this reference pages but for some reason it’s not working. @SpringBootApplication public class…
Keshavram Kuduwa
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Is there any way to use Pulsar with schema registry via websocket-/REST API?

I have a Java client consumer that is recieving Pulsar (v2.10.0) AVRO messages (Employees), like this: import org.apache.pulsar.client.api.Consumer; import org.apache.pulsar.client.api.Message; import…
MPleus
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Apache Pulsar Zookeeper: Unable to access datadir, exiting abnormally

I am using these steps to use apache pulsar on docker: https://github.com/streamnative/tgip/blob/master/episodes/001/demo.md I was able to use these steps before to install and use pulsar but for some reason now when am creating a directory, it is…
BajrangDubey
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Apache Pulsar Rar file

We have been using rar files JCA connector/Resource adapter for JBOSS to connect to ActiveMQ and looking for similar rar file for Pulsar - Do we have a similar rar file for Pulsar ?
Akhilesh Dwivedi
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Apache Pulsar function's state, is it persisted "forever" if we don't explicitly call deleteState?

When a function uses context.putState(id, object), is the saved object forever saved in the bookkeeper until an explicit deleteState(same id) is called? Is there some point in time, some action of any kind, or some event which cleans up the used…
Toni Kanoni
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