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Questions tagged [hazelcast]

Hazelcast is an open source In-Memory Data Grid platform. The architecture supports high scalability and data distribution in a clustered environment. It supports auto-discovery of nodes and intelligent synchronization.

Hazelcast is an open source In-Memory Data Grid platform. The architecture supports high scalability and data distribution in a clustered environment.

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Can we read parquet file in Hazelcast jet?

I trying to read parquet file via Hazelcast for that I have written below code which is working fine, but do Hazelcast provide any in-build source to read parquet file? BatchSource csvData = SourceBuilder .batch("parquet-source", x…
user3458271
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Why is my Hazelcast topic publisher hello world is not working?

I have made a simple Hazelcast topic publisher in C#. My code is working on Linux, but not on Windows. Can you help me to understand why? The code only executes to the line "code stops executing here". public static async Task…
Michael Chrestiansen
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Aggregation and grouping using Hazelcast jet

I am trying to do grouping and aggregation using Hazelcast Jet but it is getting little bit slow as I have to loop through data twice one for creating groupingKey and after that aggregating all data so is there any better and feasible way to it,…
user3458271
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Hazelcast's IMap stopped working after upgrading to version 5.1.1 on K8S

We have an "cache" (javax.cache.Cache) implementation that is a wrapper of Hazelcast's IMap. We use a composite Object key. We upgraded from version 3.12.5 to 5.1.1. When I deploy the system on a local Windows machine, all works well. But when I…
Ido Gal
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Hazelcast, check if particular key is available in hazel cast map which is configured with mapLoader(read through)

We have implemented read-through using MapLoader with load key functionality which loads specific keys and value from database to Hazelcast map as a part of read-through. My question is if We want check if particular key is available in hazelcast…
ashish jain
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Hazelcast error after upgrading spring boot from 2.3.5 to 2.6.6

To fix the Springshell vulnerability, I have upgraded the spring version from 5.2.10.RELEASE to 5.3.18 and Spring boot from 2.3.5.RELEASE to 2.6.6. Here we are also using hazelcast-hibernate53 which also got upgraded from 1.3.2 to 2.2.1 After…
Prashant Bhagwani
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Hazelcast map on kubernetes not in sync

Writing a spring based application written in kotlin with hazelcast I encounter issue when deploying to kubernetes. For hazelcast on kubernetes I use DNS lookup mode for discovery. I have the following hazelcast configuration: hazelcast: network: …
Sjoerd222888
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distributed lock with limited number of process can use

I am looking for a distributed lock framework that has a feature like, only limited number of process can use this lock. For example: Lock lock =new Lock("key", 5); Only 5 process can use this lock at the same time, others has to wait until one of…
mr.Nobody
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Atomiclong list in Hazelcast cluster 4.0

Is there anyway in Hazelcast client to get the list of AtomicLongs present in the cluster. I might need to know the counter names to clear it, since there is no TTL for AtomicCounter. Earlier i used the approach mentioned here - Atomiclong list in…
Prabhu shanmughapriyan
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Hazelcast event listener with predicates

I need to listen to a HZ update event ONLY when an specific property of the object changes: https://docs.hazelcast.com/imdg/4.1/data-structures/map#listening-to-map-entries-with-predicates But I dont know if this could be done through a Predicate…
Developer01561315
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Hazelcast Jet not allowing Tomcat to stop

I am using Hazelcast jet to some aggregation and grouping but after being idle for sometime and when I tried to stop my tomcat it is not allowing to stop my tomcat and I have restart my PC. Below is the error which I am getting. Please anyone can…
user3458271
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Embedded hazelcast cluster occasionally breaks for no apparent reason

The hazelcast cluster runs in an application running on Kubernetes. I can't see any traces of partitioning or other problems in the logs. At some point, this exception starts to appear in the logs: hz.dazzling_morse.partition-operation.thread-1…
user625488
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Hazelcast kubernetes discovery

We have spring boot application with embedded hazelcast deployed on kubernetes platform. We are using kubernetes API strategy to auto discovery of the pods. My understanding is that we need to run RBAC.yaml which basically grants the roles to…
Sravan Reddy
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Caused by: java.io.IOException: No connection found to cluster

Hello working on microservices, when doing a stress test on start Hazelcast working fine but after some load client is shutting down exception came and Caused by: java.io.IOException: No connection found to cluster error occurred continuously. I am…
Hamza Shahid Ali
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Apache camel hazelcast5 integration

We need to ugrade hazelcast4 to Hazelcast5 and we are using Camel connectors.Does Apache Camel connector supports the Hazelcast5.any answer or reply or link will be helpful
bimlesh prasad singh
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