Spring WebFlux: Only one connection receive subscriber allowed

Question

I am writing a simple app with Spring 5 Webflux and Kotlin. I am trying to implement PUT endpoint in a following way:

PUT(\"/confs/{id}\", {
    val id = it.         


        

Answer 1

I had a similar issue. The fix was to specify this dependency:

org.springframework:spring-webflux:5.1.4.RELEASE

As I used spring-boot it deploys the previous version of it. Unfortunately, the link to this issue is not existing now.

So now my gradle looks like this:

compile('org.springframework.boot:spring-boot-starter-data-mongodb-reactive')
compile('org.springframework.boot:spring-boot-starter-webflux')
// Next 2 dependencies are temporally here until the one above does not resolves next to at least 5.1.4 - where 
// webflux issue is resolved:
// https://github.com/rstoyanchev/spr-issue-migration-test-2/issues/17323
compile('org.springframework:spring-webflux:5.1.4.RELEASE')
compile('org.springframework:spring-web:5.1.4.RELEASE')