hazelcast-jet | Distributed Stream and Batch Processing

 by   hazelcast Java Version: v4.5.4 License: Non-SPDX

kandi X-RAY | hazelcast-jet Summary

kandi X-RAY | hazelcast-jet Summary

hazelcast-jet is a Java library typically used in Big Data, Kafka, Spark, Hadoop applications. hazelcast-jet has no bugs, it has no vulnerabilities, it has build file available and it has high support. However hazelcast-jet has a Non-SPDX License. You can download it from GitHub.

Jet is an open-source, in-memory, distributed batch and stream processing engine. You can use it to process large volumes of real-time events or huge batches of static datasets. To give a sense of scale, a single node of Jet has been proven to aggregate 10 million events per second with latency under 10 milliseconds. It provides a Java API to build stream and batch processing applications through the use of a dataflow programming model. After you deploy your application to a Jet cluster, Jet will automatically use all the computational resources on the cluster to run your application. If you add more nodes to the cluster while your application is running, Jet automatically scales up your application to run on the new nodes. If you remove nodes from the cluster, it scales it down seamlessly without losing the current computational state, providing exactly-once processing guarantees.

            kandi-support Support

              hazelcast-jet has a highly active ecosystem.
              It has 1054 star(s) with 204 fork(s). There are 82 watchers for this library.
              It had no major release in the last 12 months.
              There are 124 open issues and 759 have been closed. On average issues are closed in 27 days. There are 27 open pull requests and 0 closed requests.
              It has a negative sentiment in the developer community.
              The latest version of hazelcast-jet is v4.5.4

            kandi-Quality Quality

              hazelcast-jet has 0 bugs and 0 code smells.

            kandi-Security Security

              hazelcast-jet has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              hazelcast-jet code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              hazelcast-jet has a Non-SPDX License.
              Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

            kandi-Reuse Reuse

              hazelcast-jet releases are available to install and integrate.
              Build file is available. You can build the component from source.
              Installation instructions, examples and code snippets are available.
              hazelcast-jet saves you 106739 person hours of effort in developing the same functionality from scratch.
              It has 154939 lines of code, 12924 functions and 1568 files.
              It has medium code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed hazelcast-jet and discovered the below as its top functions. This is intended to give you an instant insight into hazelcast-jet implemented functionality, and help decide if they suit your requirements.
            • Creates a generic record from a class definition .
            • Handles snapshot phase 1 .
            • Creates an aggregate operation .
            • State check for non - whitespace characters .
            • Initialize this instance .
            • Submits a job to the coordinator thread .
            • Resolves the class definition .
            • Configures the Jetty service .
            • Finalize a job .
            • Offers an item to the outbox .
            Get all kandi verified functions for this library.

            hazelcast-jet Key Features

            No Key Features are available at this moment for hazelcast-jet.

            hazelcast-jet Examples and Code Snippets

            No Code Snippets are available at this moment for hazelcast-jet.

            Community Discussions


            Dependency convergence error while validating Hazelcast project
            Asked 2021-Jun-01 at 10:41

            Getting this error for "mvn clean validate". Is this issue the same as https://github.com/googleapis/java-storage/issues/133? Can someone please help to resolve this? I haven't changed pom.xml.



            Answered 2021-Jun-01 at 10:41

            You either need to disable the dependencyConvergence check in the POM, or you need to add an entry to the section of your POM which contains the version of error_prone_annotations that you want to use.

            Source https://stackoverflow.com/questions/67774399


            Hazelcast Jet Kafka with not serializable event handler
            Asked 2020-Nov-22 at 13:33

            I want to use hazelcast-jet-kafka in my app, because in my case the number of kafka partitions is limited. How I understand jet-kafka parallelism doesn't depend on kafka partitions, it would be nice to find explanations of how jet-kafka achieve independence of the number of kafka partitions.

            But my question is how I can handle events in jet when my event handler could not be serializable. For example, I've found a solution - use map sink and add local event listener to this map, but for me, it seems like a crutch, because I don't need to store these events in map. It is possible to set map size to zero in such scheme?

            Also, I see in docs new type of sink - observable, it seems what I want, but observable listener could not get only local entries and for me, it is not suitable.

            Could you help find the right solution? Or hazelcast-jet-kafka is not a good choice in that case?



            Answered 2020-Nov-22 at 13:33

            it would be nice to find explanations of how jet-kafka achieve independence of the number of kafka partitions.

            One Jet thread can handle any number of partitions, so it's easy to achieve this independence. Jet just distributes all the partitions fairly among all the Kafka connector threads.

            But my question is how I can handle events in jet when my event handler could not be serializable.

            Hazelcast Jet doesn't require your event handler to be serializable. If you need a stateful handler, you have to supply a function that creates the state object. The function must be serializable, but the state doesn't have to be. If you just want a stateless mapping function, it must be serializable, but usually there's no problem with that.

            If you are getting an error that says a function is non-serializable, this can be due to a common pitfall of capturing more state than you actually need in the lambda. You should show your code in that case.

            Source https://stackoverflow.com/questions/64952553

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install hazelcast-jet

            You can download Jet from https://jet-start.sh.


            Hazelcast Jet team actively answers questions on Stack Overflow and Hazelcast Community Slack. You are also encouraged to join the hazelcast-jet mailing list if you are interested in community discussions.
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