I started exploring about Hazelcast functionalities and I've been trying use a MapStore as a Write-Behind buffer for my database through HazelcastRepository. My goal is to use a JpaRepository insid...

We are choosing the best option for implementing a leader election for our service (written in Java) comprised of multiple (e.g., 3) instances for high availability. Our goal is to have only a sing...

Trying to wrap my head around these 3 projects and they all seem to handle slightly different problems that arise when trying to cluster. But all the documentation for them is sort of written for d...

I'm trying to add a new member to my newly created HazelcastInstance (after it has been initialized) but I cannot find the API to do so. I don't want to use Multicast, so I disabled it, here's the ...

My Spring Data JPA/Hibernate Application consumes over 2GB of memory at start without a single user hitting it. I am using Hazelcast as the second level cache but I had the same issue when I used e...

In my current setup, I'm using the default multicast option of the Hazelcast cluster manager. When I link the instances of my containerized Vertx modules (via Docker networking links), I can see th...

I have some IMDG experience I am rather new to KAFKA. I am trying to understand the use case for Kafka. I understand it is a streaming/messaging platform. A lot of its issues have some contra parts...

We use hazelcast in client-server mode. The hazelcast cluster contains 2 hazelcast nodes and we have about 25 clients connected to the cluster. What I am lookin for now is a simple check that tri...

I have an apache camel route which is processing a POJO on the exchange body. Please look at the sequences of lines marked from 1 to 3. from("direct:foo") .to("direct:doSomething") // 1 (POJO o...

I am developing web socket application using Hazelcast to share the status of the online users. Everything works fine except one thing that is when one of the application instance goes down or rest...

I'm having a problem using the hazelcast in an architecture based on microservice and springboot. I keep one of the applications with being the application that will be the server of hazelcast and ...

I am currently struggling with the following problem: I have a Java EE application that shall be able to run in a cluster (it actually does). For the data exchange between the nodes I use Hazelcas...

Does anyone have any real world experience with Hazelcast distributed data grid and execution product? How has it worked for you? It has an astonishingly simple API and functionality that see...

Below is the HazelCast Programmatic Configuration given in Documentation but it is unable to add members in HazelCast Cluster. Config cfg = new Config(); Hazelcast.newHazelcastInstance(cfg); c...

We have a cluster of Hazelcast nodes all running on one remote system (single physical system with many nodes). We would like to connect to this cluster from an external client - a Java application...

I know it's unfair with the terracotta guys, but has anyone tried to use Hazelcast in order to use scheduled jobs in a clustered environment? The simplest implementation I can image is the followi...

I'm developing in Vert.x (based on Netty and Hazelcast), and I'm trying to share data between two server instances (eache of those instances in different machines, on the same lan). My problem is ...

I am researching the algorithm that hazelcast uses to find the master node in multicast way.First I find the function to find master node: com.hazelcast.cluster.MulticastJoiner.findMasterWithMultic...

How do you use Hazelcast as a http session store with embedded Tomcat with Spring Boot and Spring Security? I see there is a EmbeddedServletContainerCustomizer and SpringAwareWebFilter but I don't ...

In my unit tests, I want to create an embedded (in-process/in-memory) Hazelcast instance that does not attempt to start or perform any networking operations at all. How do I do this? For example:...

Redis Vs Hazelcast If my app: Have a lot of http requests (6,000 per minute, I collect clicks info) that needs to be saved Have a lot of http requests that query the data previously saved. ...

I am novice in hazelcast and I have a few questions. As I understand hazelcast comes with two entities HazelcastInstance(as I understand it is server) and HazelcastClient. These entities even pack...

Context We want to use Hazelcast as our JCache implementation inside TomEE. As we don't need insane performance, at the moment, we want to run the Hazelcast node as part of our application. We us...

Is there any way to set TTL per record in hazelcast DB?Preferably in Map or Ringbuffer.

My Hazelcast-based program can work in two modes: submitter and worker. Submitter puts some POJO to the distributed map by some key, e.g.: hazelcastInstance.getMap(MAP_NAME).put(key, value); Wor...