Deadlock in Graph with Partition/Merge Nested in Broadcast/Zip
Hello, I am trying to build a graph modelling a case statement, with the added capability to combine the output of the merge with the input of the partition. The graph basically looks like this:...
View ArticleHow to look up Actor by path?
I am looking for a way to lookup the local snapshot store actor in order to delete snapshots, because in Akka typed I have no API anymore to clean-up ALL events when a persistent actor is not needed...
View ArticleTyped group route: how to add routees
I have tried this example but think that I misunderstand both the example and the documentation. I have tried to adapt the example but get: Message [concurrency.StatsWorker$Available] to...
View ArticleWhat is the ActorSystem used for in Akka HTTP Http() constructor?
The Http() constructor to bind a route to an IP and port (in effect, create a server) takes in a typed ActorSystem as an implicit parameter. Can I get an idea of what this actor system is used for?...
View ArticleSupervisor restart ends in an inactive actor: messages sent to dead letter
I am experimenting with a tiny cluster with 1-2 Producer seed-nodes: "akka://WorkStealSystem@127.0.0.1:25251", "akka://WorkStealSystem@127.0.0.1:25252" I have another Consumer actor that subscribes to...
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Instrument Source.queue
everybody! I’d like to gauge the saturation of the buffer maintained by the Source returned by Source.queue. Is there any known pattern (or out-of-the-box component) to achieve this? I’m under the...
View ArticleAkka HTTP 10.2.1 Released
Dear hakkers, We are happy to announce the 10.2.1 release of Akka HTTP. This release is the first update in the 10.2.x series of Akka HTTP. Changes since 10.2.0 For a full overview you can also see...
View ArticleThread safety of Source.queue
Is it safe to do something like this: val (queue, source) = Source.queue[T](bufferSize, OverflowStrategy.backpressure).preMaterialize() Future { // in reality, the queue would be passed off somewhere...
View ArticleDynamically decide on whether to do Elasticsearch retries based on error...
With akka-stream-alpakka-elasticsearch version 1.1.2 there was an option to implement RetryLogic which allowed us to override boolean shouldRetry(final int retries, final Seq<String> errors)...
View ArticleCan we obtain the Cluster.Member from an ActorRef?
Given an ActorRef received from a message, can we determine the Cluster.Member? TIA 4 posts - 3 participants Read full topic
View ArticleAkka Typed version cluster sharding with distributed pubsub
Hi Team, I am reading this https://doc.akka.io/docs/akka/current/typed/distributed-pub-sub.html. And didn’t found anywhere the actual implementation for this. Concept wise its clear but implementation...
View ArticleHow can we obtain an ActorContext with the Asynchronous testing API
(topic withdrawn by author, will be automatically deleted in 24 hours unless flagged) 1 post - 1 participant Read full topic
View ArticleHow to migrate my event stream code to 2.6.9
Hi I am in the process of migrating my Akka project from 2.5 to 2.6.9. But there doesn’t seem to be any mention of the eventStream in the documentation for 2.6.9 that I can find. Can someone advise me...
View ArticleFailing in one branch of the akka stream did not failed execution of another...
I have quite simple Akka Graph with one source and 2 sinks. What I expect if sink in one branch fails it should stop executing second branch, but it’s not what I see in reality. In reality second...
View ArticleAkka 2.6.10 released
Dear hakkers, We are excited to announce a new patch release of Akka 2.6. Notable changes relative to 2.6.9 include: Improvements of rolling updates and rebalance in Cluster Sharding, see below Quick...
View ArticleHow to build a reusable extention for Akka appliactions?
Hi. I’ve written a simple Akka application with one Actor class. In this application, I have a manual send (!) function. There is a priority among messages as control messages are required for the...
View ArticleUsing Flow as Sink/Source
Hi All, I’m having a bit of difficulty combining some akka-streams components. The goal is to be able to return a Sink[ByteString, _] that other components can use, but I’ve been unable to figure out...
View ArticleWhat is the best way to send actor updates to SSE?
My project is a set of nodes. Each node is an actor. A user can view a set of nodes (in a web page). Each node can have its state updated independent of user action. (For instance, a user A might only...
View ArticleCommiting offsets for Kafka messages that are filtered
Hi, I’m using CommitableSource and I need at-least-once processing guarantees. I need to filter some messages from Kafka so I was wondering how to commit offsets for messages that are filtered out? My...
View ArticleJackson serialization of polymorphic types without rewriting trait
I am currently working on a research project using Akka Clustering. According to the documentation, Jackson is the preferred serializer, and I am particularly interested in the CBOR binary format due...
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