Only one connection receive subscriber allowed

The problem is related to: #https://github.com/spring-cloud/spring-cloud-gateway/issues/541

occurs only with springBootVersion = ‘2.0.5.RELEASE’ with 2.0.4.RELEASE and lower works fine. webflux is included by means of starter: ‘org.springframework.boot:spring-boot-starter-webflux’

Sample controller:

@RestController
@RequestMapping("/path/{param1}/path2")
public class MyController {

    @PostMapping(value = "/path3")
    String onUploadSuccess(@PathVariable("param1") long param, @RequestBody MultiValueMap<String,String> body) {
        return "OK. param=" + param + " body=" + body;
    }

}

Post request with payload such as:

key=f9a922bd-3007-4393-a76e-925fc009639c.txt&uuid=f9a922bd-3007-4393-a76e-925fc009639c&name=rubycsv.txt&bucket=fineuploadertest&etag=123

Response: {"timestamp":"2018-09-19T06:45:02.595+0000","path":"/path/123/path2/path3","status":500,"error":"Internal Server Error","message":"Only one connection receive subscriber allowed."}

stacktrace.txt

Issue Analytics

State:
Created 5 years ago
Reactions:12
Comments:5 (2 by maintainers)

Top GitHub Comments

2reactions

sneakythr0wscommented, Sep 19, 2018

Maybe downgrade reactor?

1reaction

wilkinsonacommented, Sep 19, 2018

Sorry, but I don’t think this has anything to do with Boot itself. It’s most likely due to a change in Reactor Netty. The existing Spring Cloud issue, which @violetagg is already aware of, is sufficient for now. Spreading the issue over multiple repositories just risks wasting people’s time. Once the underlying cause has been identified, we can either re-open this or open a Reactor Netty issue as required.

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