How to deploy akka-grpc on AWS with ELB
Hi there: There is a trouble that I want to deploy my akka-gRPC Application on AWS. It is ok that gRPC client connect to server directly. Now I want to put an ELB between them. This is AWS ELB doc.It...
View ArticleAkka streams in containers
Hi, Does it make sense to run a simple akka stream application containerized and spawn 30 instances of this container: this means 30 instances of the akka actorsystem are running in different...
View ArticleAlpakka 3.0.3 released
https://doc.akka.io/docs/alpakka/3.0/release-notes/3.0.x.html#3-0-3 1 post - 1 participant Read full topic
View ArticleUnderstanding the Cassandra journal table design. why timestamp in the...
Hi, Looking at the doc, I have a question about the akka.messages table. Why is timestamp included in the primary key? If I understand the doc correctly, it is needed by the events by tag query, not...
View ArticleCombine prefixAndTail(1) with Sink.lazySink for SubFlow created by .splitAfter
I am currently developing an akka-stream/alpakka application that has the following general logic Given a Flow, split it into a SubFlow using the splitAfter method. For each of the SubFlow's in point...
View ArticleDoes `ask` introduce ordering issues between messages and signals in...
Say we two actors called parent and child and parent is watching for signals, like ChildFailed, from child. If parent uses tell to send a message to child and the child message handling logic sends...
View ArticleSpawn Global Actors Synchronously
Hi, I’d like certain actors to be globally available in my application. My specific use-case is a “status actor” that monitors the overall health of the application, who any actor should be able to...
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Force HDFS rotation when source is terminated
Hello there, First, thanks for all of your work ! I’m really impressed how well the system works :) I’m currently using akka-stream-alpakka-hdfs_2.12:3.0.3 in order to dump a stream. When the source...
View Article[PERF] Cluster Sharding perf issue
Problem Encountered ASKing a local actor achieves >120k req/s throughput, but ASKing a remote actor drops throughput to < 15k req/s. With serialisation on, local messaging still achieves >70k...
View ArticleAkka 2.6.16 released - including Durable State persistence
Dear hakkers, We are excited to announce a new patch release of Akka 2.6. Noteworthy additions and improvements in this release: Addition of Durable State persistence, see below. Exclude exiting...
View ArticleAre MergeHub and BroadcastHub thread-safe?
Please see title. I’d expect they are, meaning I can share the materialized Source and Sink around as much as I want among actors etc, but I haven’t found any explicit documentation or Q&A on...
View ArticleClusterReceptionist - missing value for Service Key resulting in deadletters
Using akka 2.6.15, management 1.0.9 and akkaHttp 10.1.11 to spin up a cluster with 4 nodes, and 4 shards using Kubernetes discovery. The configuration is given below: akka { cluster { log-info-verbose...
View ArticleReceive signals for SpawnProtocol behavior?
In Akka 2.6 SpawnProtocol.appy() returns the result of a Behaviors.receive call. But you can’t call receiveSignal on this as the return type of SpawnProtocol.apply is Behavior (unlike the underlying...
View ArticleAbout actor internal state visibility
In akka, dispatcher will spawn threads to execute mailbox which will make change to actor internal state. If we spawn thread1 on cpu1 handle message1 and then use thread2 on cpu2 handle message2. How...
View ArticleHandling ctrl+c in sbt shell
Hi everyone, I am new to Akka HTTP and the first problem I encountered is how to handle ctrl+c in sbt shell to stop my Akka HTTP application running. After ctrl+c in sbt shell, I cannot run my Akka...
View ArticleControlling the number of requests per http route
Hey there. What might be a nice way to restrict (throttle) the number of http requests that can come in for a particular service? I have a service that I’d like to restrict to serving just one http...
View ArticleAdding class functions to persisted classes
Hi, I understand you need to add migration classes if you are going to add members to a class that is persisted in the db either via snapshot or event persistence. The only exception is for new Option...
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Akka gRPC 2.1.0 released
Dear hakkers, We’re happy to announce version 2.1.0 of Akka gRPC! gRPC is a transport mechanism for request/response and (non-persistent) streaming use cases. See Why gRPC? for more information about...
View ArticleAkka Persistence JDBC 5.0.4 released!
Dear Hakkers, We are happy to announce the release of Akka Persistence JDBC 5.0.4. The full release notes can be found on GitHub release page. Happy hakking – The Akka Team 1 post - 1 participant Read...
View ArticleS3 API inconsistently honors custom Attributes
The makeBucket and checkIfBucketExists methods can use custom Attributes but the multipartUpload and download methods do not. Why is this so? It makes integration testing with localstack difficult....
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