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NPE in a simple project Spring Boot (Servlet) + RSocket + Sleuth

See original GitHub issue

Describe the bug There is a NPE in a simple application based on Spring Boot 2.3.5.RELEASE or 2.3.6.RELEASE with RSocket and Sleuth in dependencies. The problem arises when trying to execute request-response from client to the server.

Caused by: java.lang.NullPointerException: null
	at io.rsocket.core.RequestOperator.currentContext(RequestOperator.java:89) ~[rsocket-core-1.0.3.jar:na]
	at reactor.core.publisher.Operators.reportThrowInSubscribe(Operators.java:230) ~[reactor-core-3.3.11.RELEASE.jar:3.3.11.RELEASE]
	at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:71) ~[reactor-core-3.3.11.RELEASE.jar:3.3.11.RELEASE]
	at io.rsocket.core.RequestOperator.<init>(RequestOperator.java:42) ~[rsocket-core-1.0.3.jar:na]
	at io.rsocket.core.RSocketRequester$1.<init>(RSocketRequester.java:271) ~[rsocket-core-1.0.3.jar:na]
	at io.rsocket.core.RSocketRequester.handleRequestResponse(RSocketRequester.java:271) ~[rsocket-core-1.0.3.jar:na]
	at io.rsocket.core.RSocketRequester.requestResponse(RSocketRequester.java:164) ~[rsocket-core-1.0.3.jar:na]
	at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:118) ~[reactor-core-3.3.11.RELEASE.jar:3.3.11.RELEASE]
	at reactor.core.publisher.FluxContextStart$ContextStartSubscriber.onNext(FluxContextStart.java:96) ~[reactor-core-3.3.11.RELEASE.jar:3.3.11.RELEASE]
	at reactor.core.publisher.FluxContextStart$ContextStartSubscriber.onNext(FluxContextStart.java:96) ~[reactor-core-3.3.11.RELEASE.jar:3.3.11.RELEASE]
	at reactor.core.publisher.FluxMap$MapConditionalSubscriber.onNext(FluxMap.java:213) ~[reactor-core-3.3.11.RELEASE.jar:3.3.11.RELEASE]
	at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1782) ~[reactor-core-3.3.11.RELEASE.jar:3.3.11.RELEASE]
	at reactor.core.publisher.MonoZip$ZipCoordinator.signal(MonoZip.java:247) ~[reactor-core-3.3.11.RELEASE.jar:3.3.11.RELEASE]
	at reactor.core.publisher.MonoZip$ZipInner.onNext(MonoZip.java:329) ~[reactor-core-3.3.11.RELEASE.jar:3.3.11.RELEASE]
	at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1782) ~[reactor-core-3.3.11.RELEASE.jar:3.3.11.RELEASE]
	at reactor.core.publisher.MonoCallable.subscribe(MonoCallable.java:61) ~[reactor-core-3.3.11.RELEASE.jar:3.3.11.RELEASE]
	at reactor.core.publisher.Mono.subscribe(Mono.java:4213) ~[reactor-core-3.3.11.RELEASE.jar:3.3.11.RELEASE]
	at reactor.core.publisher.MonoZip.subscribe(MonoZip.java:128) ~[reactor-core-3.3.11.RELEASE.jar:3.3.11.RELEASE]
	at reactor.core.publisher.Mono.subscribe(Mono.java:4213) ~[reactor-core-3.3.11.RELEASE.jar:3.3.11.RELEASE]
	at reactor.core.publisher.Mono.block(Mono.java:1679) ~[reactor-core-3.3.11.RELEASE.jar:3.3.11.RELEASE]
	at example.ClientMain.run(ClientMain.java:32) ~[classes/:na]
	at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:795) ~[spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]
	... 3 common frames omitted

Sample spring-boot-235-rsocket-npe-example.zip Attached zip containes Maven multi-module .pom with both server and client. To reproduce the bug just start server and then client.

Other info Switching Spring Cloud down from Hoxton.SR9 to Hoxton.SR8 doesn’t solve the issue.

Switching to Spring Boot 2.3.4.RELEASE fixes the issue. Upgrade to Spring Boot 2.4.0 also fixes it.

Issue Analytics

State:
Created 3 years ago
Comments:6 (5 by maintainers)

Top GitHub Comments

1reaction

SimSoniccommented, Nov 30, 2020

@marcingrzejszczak Yes, just comment it out from pom.xml and all works.

Specifically Sleuth is present in the debugger:

0reactions

OlegDokukacommented, Dec 4, 2020

Looks like a bug on our side. Looking into it now

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