I am using Hazelcast 3.6.1 to read from a Map. The object class stored in the map is called Schedule. I have configured a custom serializer on the client side like this. ClientConfig config = new...

Lets say we have two instances of hazelcast: HazelcastInstance firstInstance = Hazelcast.newHazelcastInstance(new Config()); HazelcastInstance secondInstance = Hazelcast.newHazelcastInstance(new C...

I have a cluster with 3 nodes (in different machines) and I have a "business logic" that use a distributed lock at startup. Sometimes when there is more latency every node acquires the exclusive ...

What is the simplest way to run Hazelcast nodes on dedicated servers? We have a web application that uses a Hazelcast distributed map. Currently the Hazelcast nodes are configured to run in the Se...

Background: We have a set of about 15 Spring Boot applications as microservices. They all run as Docker containers, and run as clusters of one or more instances. We also use Spring Cloud Netflix c...

Using Eclipse on Windows, a vertx Verticle with a misconfigured cluster.xml shows the following error in the Eclipse console: 11:46:18.536 [hz._hzInstance_1_dev.generic-operation.thread-0] ERROR c...

Whats the difference between <hz:map> tag created in the applicationContext vs the one that is defined in the <hz:config> segment? How are they related? I am aware that <hz:map&gt...

I have to upgrade an app which is using an old version of hazelcast to one of the more recent versions. There was some hazelcast lock functionality which has since been deprecated and removed altog...

I am using data grids as my primary "database". I noticed a drastic difference between Hazelcast and Ignite query performance. I optimized my data grid usage by the proper custom serialization and ...

I am trying to implement Hazelcast in a simple web application. I am trying to store a custom object into my Hazelcast Map and have implemented Serializable in my Bid Object Class with the necessa...

(I could not find a good source explaining this, so if it is available elsewhere, you could just point me to it) Hazelcast replicates data across all nodes in clusters. So, if data is changed in ...

In Hazelcast, is it possible to query an IMap based on attributes of a key instead of the values? All the Hazelcast examples show querying by value. E.g., for a map of employees with keys that are ...

Trying to configure slf4j to log in DEBUG mode, but get only INFO logs. What am I doing wrong? Config hazelcastConfig = new Config("HazelcastConfig"); hazelcastConfig.getProperties().put("hazelcas...

I am implementing the hazelcast map store for persistence. But could not autowired spring beans(DataSource below) into the hazelcast mapstore object (meaning hazelcast not getting the map store obj...

Current release of Hazelcast is 3.4 and I see there are two jars in the lib folder of the download page http://hazelcast.org/download/ hazelcast-3.4.jar hazelcast-all-3.4.jar What is the diffen...

Because of a known (fixed) bug in Hazelcast 2.5 we've decided this would be the next upgrade candidate for our project. But after dropping in the latest version (3.2.2) we had horrible performance....

We use Hazelcast 2.6.2 in a legacy Java clustered application. When the application is stopped the JVM does not terminate any more. It seems that it is caused by Hazelcast threads not being flagged...

I'm new to Hazelcast - evaluating and prototyping to see if it fits our distributed memory cache needs. One of the requirements was to be able to use wild cards to search for keys in a given map. L...

I know that it is possible to display the value of a key that is part of a Map that was stored in hazelcast using REST. Using curl this would be done this way: curl -v -X GET http://127.0.0.1:570...

Read about JSR-107 and JCache recently. Would like to know whether Hazelcast or Ehcache follow this JSR?

The context Two nodes of a Hazelcast cluster, each on a discrete subnet so multicast is not suitable nor working for node location. I should like to employ the most minimal XML configuration file...

I am not completely certain about the purpose for the auto-increment flag in the hazelcast xml config file. When I have that turned off, I see multiple exceptions in my server instance complaining ...

I'm using Hazelcast as a shared map in my application. My map is like that: Map<String, MyObject> and MyObject: class MyObject implements Serializeble { // Map FieldName -> FieldValue...

I am using the following code to create an map in HazelCast HazelcastInstance instance = null; Config cfg = new Config(); instance =Hazelcast.newHazelcastInstance(cfg); instance.getMap(mapName); O...

I would like to get the masterIpAddress use on the Hazelcast node in HazelcastInsatnceImpl from an instance HazelcastInsatnce. Somebody know how to do that? Thanks for your help