Combining Streams with disparate types
Apologies for the bad title, but not sure how to succinctly describe the question. I have an unlimited Source[A, NotUsed] and a limited Source[B, NotUsed] where the latter is basically just a future...
View ArticleAre Akka persistence side effects always handled on the same entity?
Hey all, wondering if anyone has seen this kind of weird issue with akka persistence: I’m essentially sending (via ask) a command to an entity, and the command handler for that command will persist 2...
View ArticleFailed to serialize remote message
I am trying to migrate Akka from 2.4.1 to 2.6.19 during this migration I am facing some serialization issues as follows. akka.remote.MessageSerializer$SerializationException: Failed to serialize...
View ArticleDoes below config will work for disabling java serialisation in akka 2.4.1?
enable-additional-serialization-bindings = on serializers { proto = “akka.remote.serialization.ProtobufSerializer” } serialization-bindings { “java.io.serializable” = none...
View ArticleHow to get metadata of a Cassandra session in Akka Projection?
I need to register some UDT codecs to the Cassandra session. But the session built by CassandraSessionRegistry(system).sessionFor(...) hasn’t the member getContext or getMetadata. I can’t get specific...
View ArticleSBT compiled .proto, but IDEA can't recognize the trait built by it?
I use SBT 1.8.2 to compile some .proto. It shows compiling all of them well and generating result to the target dirctory. But when I extend the trait of service generated by the .proto, IDEA can’t do...
View ArticleAKKA library in android studio Koltin project
Hello friends, I am new to AKKA, and I want some examples of how to use the Akka library in the android studio project. I just want to use the AKKA library instead of Retrofit. is it possible? please...
View ArticleHave anyone had success deploying an Akka cluster on Docker Swarm?
I’ve spent a lot of time trying to get even a very simple clustering exampling working on a small docker swarm cluster. If anyone can point me at some examples, provide some pro tips, or even claim...
View ArticleImproving Resiliency of Akka IO DNS
We recently encountered an interesting failure mode with some of our critical infrastructure that is based on Akka and Akka HTTP. At the time of the failure there was resource contention on the host...
View ArticleAlpakka S3 GetObject metadata as materialized value
DISCLAIMER: I’m fairly new to Akka streams, so this is my best understanding of the behaviour. Alpakka S3 version 4.0.0 deprecated S3.download in favour of S3.getObject. The relevant parts of the...
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Is the DDL script of Projection_Management wrong?
Environment: Akka 2.7.0 Akka Projection: 1.3.1 Cassandra Driver: 4.15.0 Akka Persistence Cassandra: 1.1.0 Problem I copy the DDL scripts for offset and projection_management schema, replace the...
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The Akka gRPC QuickStart can't run
Environment Windows 11 Java 11 Scala 2.13.4 Akka 2.8.0 IDEA 2023.1 Project developer.lightbend.com Akka gRPC Quickstart with Scala I modified nothing about the official project. The guide shows...
View ArticleAlpakka JMS dispatcher
According to JMS specs ( Java Message Service(TM) 1.0.2 API Specification: Interface Session ): “Once a connection has been started, any session with a registered message listener(s) is dedicated to...
View ArticleNested use of unfoldResource
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View ArticleSet type of service field in IP headers
Hi all, I would to know if there is a way to set the value of the type of service field in the IP header of the packets sent during an http request. In the documentation I saw that this field that can...
View ArticleAlpakka - Bigquery.InsertAllAsync not working as expected
Hello, Getting below exception while trying to write data into BigQuery using Alpakk’s Bigquery.InsertAllAsyc. function. AkkaVersion = “2.6.19” AlpakkaVersion = “3.0.4” AkkaHttpVersion = “10.2.4” {...
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How to solve the conflict between Akka gRPC plugin of SBT and ScalaTest?
Environment Windows 10/11, Debian 5.10 JDK 11.0.18 SBT 1.8.2 Akka gRPC plugin 2.3.0 ScalaTest 3.2.15 Problem While the Akka gRPC plugin is enabled, the test fixtures of ScalaTest can’t be recognized...
View ArticlewireTap and dropped elements
Hi all. Can def wireTap(f: Out => Unit) actually drop elements in practice? It uses Sink#foreach, which will always pull for an element IIUC. I understand that the other variant (def wireTap(that:...
View ArticleAkka - Actor Cluster Inconsistent Shard rebalance while Rolling restart of nodes
Issue When more no of actors in a shard the rebalancing is not happening properly when rolling restart of nodes. When the nodes restarted one by one sequentially some shard not rebalancing to other...
View ArticleHow to bubble up the exception root cause in a recursive algorithm...
I am keen on getting to know akka, and thanks to every creator of akka involved. I started with a recursive zipping job, i.e. anonymous agents (Behaviours) are spawned with the intention to do the...
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