reactor | Reactor is the firmware generator part of Fusion

SpringBoot v2.5.1

There is an endpoint requesting a long running process result and it is created somehow
(for simplicity it is Mono.fromCallable( ... long running ... ).

Client make a request and triggers the publisher to do the work, but after several seconds client aborts the request (i.e. connection is lost). And the process still continues to utilize resources for computation of a result to throw away.

What is a mechanism of notifying Project Reactor's event loop about unnecessary work in progress that should be cancelled?

I'm trying to run one test for my class "Sinus" (used to compute the sinus of a float), but when I try to run this test to generate my coverage report with Cobertura, it doesn't work and I really don't know why ! Dou you have advices or any explanation please ? (I use the cmd : mvn cobertura:cobertura)

-This is my test:

I'm beginner in Project Reactor and think it's pretty easy, but I can't find the solution. I have N expensive tasks to do, and I want to implement something like Bounded Semaphore in Java (do not request next element until current count of running task less than K). Shortly: complete all tasks, but no more K tasks at the same time

In my app I use retrofit2(2.9.0) with OkHttp3(3.14.4). I want to add tls client certificate to all of my requests to some api. I've got the certificate in a .p12 file. I read the file, loaded into X509Certificate class then I used the .addTrustedCertificate(certificate) method. The certificate is correct I tried it using curl. Unfortunately when I run the code I get an exception.

Context: I followed this link on setting up AWS MSK and testing a producer and consumer and it is setup and working correctly. I am able to send and receive messages via 2 separate EC2 instances that both use the same Kafka cluster (My MSK cluster). Now, I would like to establish a data pipeline all the way from Eventhubs to AWS Firehose which follows the form:

Azure Eventhub -> Eventhub-to-Kafka Camel Connector -> AWS MSK -> Kafka-to-Kinesis-Firehose Camel Connector -> AWS Kinesis Firehose

I was able to successfully do this without the use of MSK (via regular old Kafka) but for unstated reasons need to use MSK now and I can't get it working.

Problem: When trying to start the connectors between AWS MSK and the two Camel connectors I am using, I get the following error:

These are the two connectors in question:

1. AWS Kinesis Firehose to Kafka Connector (Kafka -> Consumer)
2. Azure Eventhubs to Kafka Connector (Producer -> Kafka)

Goal: Get these connectors to work with the MSK, like they did without it, when they were working directly with Kafka.

Here is the issue for Firehose:

Hi I thought this would be pretty straightforwards but I can't figure it out.

It can't find binance.websockets for whatever reason even though it can find binance.client which should be part of the same package?

I am trying to do following operations on Flux/Publisher which can only be read once ( think database results which can be read once). But, this question is generic enough that it can be answered in functional programming context without reactor knowledge.

1. count unique item
2. check if an element exists
3. Don't call the publisher/flux generator multiple times.

I am trying to learn Spring webflux. I have written the following code to test the performance of reactive programming. Here is my controller of one service:

I have the following command, which I'm using to build a specific microservice ():