Is it possible to write a resilient Kafka producer using Alpakka?
@baltiyskiy wrote: In my use case, I need to produce data into Kafka. When Kafka is not available, I want the producing stream to backpressure and retry with exponential backoff, and not lose any...
View ArticleSlowing down processing on business errors
@sebarys wrote: Hello, I’m trying implement stream where: messages are read from init topic each message is processed (business logic part) based on processing result optionally publish message commit...
View ArticleUnique constraint validation
@gervaisb wrote: Hello, Given an Actor system where some persistent actors can have external identifiers that must be unique, how can we enforce this constraint ? I would prefer a hierarchy of actors...
View ArticleIssues trying to join a cluster locally using akka-bootstrap and akka-discovery
@octavz wrote: Hi, I want to setup a local environment (for testing) where multiple clusters would use same address and different ports: I have 3 nodes with this config (the management.http.port is...
View ArticleShared Level DB
@alan.brewster73 wrote: Hello, I am using the typed actor system, and trying to locally test persistence using shared Level DB. I have tried following the documentation to spawn the Shared Level DB...
View ArticlePersistence and Clustering
@alan.brewster73 wrote: Hi, I am running a POC with persistent actors and clustering. I am very new to AKKA. Is it a fair assumption when I have multiple nodes in a cluster, any state changes to an...
View ArticleHas anyone attempted to use Akka in an Android application?
@dave-n-bits wrote: All the examples that I found online are over 5 years old, so I’m wondering if anyone has experience with trying something similar with todays libraries? What challenges did you...
View ArticleCluster Sharding with Persistent Entities
@alan.brewster73 wrote: Hello, I have a two node cluster using persistent actors with sharding. The nodes are exposed to the external world using AKKA HTTP routes. if I get a request for an entity to...
View ArticleSbt compile keeps reformatting some Java sources
@dope9967 wrote: Hello, I’m trying to compile Akka on my workspace PC using IntelliJ, trying to figure out whole setup so I can contribute productively. I had to work around some issues with...
View ArticleAsk Pattern with Shard Region
@alan.brewster73 wrote: Hi, How do I do an ask with a Shard Region? Currently, I am asking the entity reference directly as shown below. val sharding = ClusterSharding(system) val shardRegion =...
View ArticleType id handling not implemented for type scala.Tuple3 (by serializer of type...
@iLoveZod13 wrote: Hi there, I am using Jackson for message serialization and getting the error message: Type id handling not implemented for type scala.Tuple3 (by serializer of type...
View ArticleKafka producer failed to write
@architmmmec wrote: I am using Alpakka Kafka Producer flow and I want a way to see if the message was produced successfully or failed while writing to Kafka and I want to pass this info in downstream....
View ArticleDifference between tell and ask in a shard
@alan.brewster73 wrote: Hello. Could someone please explain in the below snippet why the tellShard call always work as expected in a multi-node cluster. But the askShard call only works if an external...
View ArticleActor message allocation to dispatcher thread
@hemnath wrote: It is known that Dispatcher threads are responsible for executing the actor messages. Using throughput parameter we can define no. of messages processed by dispatcher thread before...
View ArticleOptimizing akka stream throughput with multiple slow flows
@AndreasPresthammer wrote: I’m using akka 2.6.4. I’m trying to figure out the right way of optimizing an akka stream for throughput. The stream in question will have several flows, where each flow...
View ArticleAkka Remoting not fully shutting down after test?
@jducoeur wrote: I’m building an application based on Akka Cluster Sharding, under Play 2.7 (and thus Akka 2.5), using Classic Akka for now. (I’ll switch to Akka Typed in due course, probably after we...
View ArticleUnmarshaller.entityToMultipartFormData
@flexvalley wrote: Hi, I’m using Akka 2.6.4 with scala 2.13 in Java 11. I’m working to build a Rest Server with Akka-http and for now it’s works very fine. I having some trouble to implement...
View ArticleHow to create ResponseEntity from OutputSteam
@mEaswari wrote: I am using Akka HTTP 10.1.11 HttpEntities.create supports creating from File or ByteString but not from OutputStream. How to create akka.http.javadsl.model.ResponseEntity from...
View ArticleShard Coordinator Unable to get Initial State
@alan.brewster73 wrote: (topic withdrawn by author, will be automatically deleted in 24 hours unless flagged) Posts: 1 Participants: 1 Read full topic
View ArticleAkka Persistence Cassandra 1.0.0-RC2 released
@patriknw wrote: This is the second release candidate for 1.0.0 Notable changes since 1.0.0-RC1: Initial testing with CosmosDB #762 Remove timebucket from clustering column #399 Fix storage port...
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