Hazelcast Blog

Hazelcast Blog


Spring Boot: Hazelcast for Session Replication

Rafal Leszko
by Rafal Leszko | Jul 24, 2020

NOTE: This is an updated version of a previous blog. This article contains updated information. You can use Hazelcast for HTTP session replication between multiple replicas of your Spring Boot application. For example, imagine that you have a classic example of an online shop with customer’s items stored in the session. Users start to add […]

Designing an Evergreen Cache with Change Data Capture

Nicolas Frankel
by Nicolas Frankel | Jul 20, 2020

It has been said that there are two things hard in software development, naming things and cache invalidation (while some add off-by-one errors to the mix). I believe that keeping the cache in sync with the source of truth might count as a third one. In this post, I’d like to tackle this issue, describe […]

Jet 4.2 is Released!

Can Gencer
by Can Gencer | Jul 14, 2020

Jet 4.2 is finally here! Here’s an overview of what’s new: Change Data Capture Support for MySQL and PostgreSQL Previously, Jet has had support for Debezium as a contrib package. We’re happy to announce that we’ve made several improvements to this package and decided to make this a part of our main release. Debezium was developed initially […]


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An Experiment in Streaming: Bytecode Continuous Deployment

Nicolas Frankel
by Nicolas Frankel | Apr 16, 2020

Once one starts their journey in data streaming, one starts to discover a lot of applications beyond just the standard Extract-Transform-Load pattern. The traditional model to deliver a new version of a Java application is to stop the process, deploy the new JAR/WAR, and start the process again. This directly results in downtime: in this […]

Spring Boot Tomcat Session Replication on Kubernetes Using Hazelcast

Alparslan Avci
by Alparslan Avci | Apr 14, 2020

Spring Boot is a framework that helps to build microservices easily. In the Java ecosystem, it’s one of the most preferred ways of building microservices as of now. In a microservice architecture, there are different options to share data among the running services: one of them is caching, which Spring Boot leverages. It also provides […]

Upgrading to Jet 4.0

Hazelcast Community
by Hazelcast Community | Apr 10, 2020

As we have announced earlier, Jet 4.0 is out! In this blog post, we aim to give you the lower-level details needed for migrating from older versions. Jet 4.0 is a major version release. According to the semantic versioning, we apply, this means that in version 4.0 some of the API has changed in a […]

Top 5 Scenarios for Blue/Green Deployments

Burak Celebi
by Burak Celebi | Apr 08, 2020

In the first blog post, I explained the Blue/Green Deployments feature of Hazelcast IMDG Enterprise in general. Now, it is time to go through the top 5 scenarios where you can benefit this feature from. When using these features, it may be necessary to copy data or synchronize data from one cluster to the other. […]

Securing Hazelcast with Cert-Manager

Rafal Leszko
by Rafal Leszko | Apr 06, 2020

Cert-Manager became a standard way for issuing and rotating certificates in Kubernetes and OpenShift environments. Simple to install. Simple to use. Well integrated with Vault and other secret managers. No surprise it’s the way to go if you want to set up secure communication between your applications! In this blog post, I show how to […]

Introduction to Blue/Green Deployments with Hazelcast IMDG

Burak Celebi
by Burak Celebi | Apr 02, 2020

This is the first blog post for Hazelcast IMDG’s Blue/Green Deployments feature, which is the most recent member of the Enterprise edition.  “Blue/Green deployment” refers to a software technique used to reduce or even eliminate system downtime and the associated business risk by deploying two mirrored production environments referred to as “Blue” and “Green”.  In […]

Tech Talk Series

Vladimir Schreiner
by Vladimir Schreiner | Apr 01, 2020

Virtual meetups with Hazelcast covering data streaming and in-memory computing topics.

Announcing Hazelcast Cloud Enterprise GA on AWS

Seb Benmbarek
by Seb Benmbarek | Mar 31, 2020

Today, we’re happy to announce the general availability of Hazelcast Cloud Enterprise on AWS. This much-anticipated release will make it even easier for solution architects and developers with a need for extra-low latency to leverage the power of Hazelcast IMDG within their cloud technology stack. What is Hazelcast Cloud Enterprise? Even though we already offer […]

Getting Started with Hazelcast Cloud Enterprise

Mike Yawn
by Mike Yawn | Mar 31, 2020

Hazelcast Cloud Enterprise is the new cloud-native managed service that allows you to quickly set up a cluster of Hazelcast IMDG nodes in a public cloud (Amazon Web Services today, with Google GCP and Microsoft Azure coming later this year), and have that cluster fully managed for you by Hazelcast. Setting up the cluster requires […]


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