Nullpointer for tagsMetadata in Gateway RSocket Broker

[spencergibb]

@FWinkler79 said:
I am using ...
Spring Boot: 2.2.0.RELEASE
Spring Cloud: Hoxton.BUILD-SNAPSHOT
Sample project: here

My setup is as follows:

1. service-gateway is an RSocket broker-enabed SCG
2. reservation-service exposes an RSocket endpoint to create a reservation
3. reservation-service-client exposes a Web-endpoint (WebFlux-based) to POST a reservation-creation request, which will be translated into an RSocket-request. The request should traverse gateway and reach reservation-service
4. The reservation-service-client uses declarative forwarding / routing metadata in its application.yml

When running this setup, I receive the following NullPointerException in SCG:

Found routes: [[RoutingTableRoutes.RegistryRoute@45d46254 id = '1', predicate = [RoutIdPredicate 1]], [RoutingTableRoutes.RegistryRoute@294b114a id = '400', predicate = [RoutIdPredicate 400]], [RoutingTableRoutes.RegistryRoute@19d2ef80 id = '500', predicate = [RoutIdPredicate 500]]]
2019-10-21 17:39:12.705 DEBUG 20703 --- [ctor-http-nio-3] o.s.c.g.rsocket.core.GatewayRSocket      : Unable to find destination RSocket for null
2019-10-21 17:39:12.705 DEBUG 20703 --- [ctor-http-nio-3] o.s.c.g.r.core.PendingRequestRSocket     : creating pending RSocket for null
2019-10-21 17:39:12.714 ERROR 20703 --- [ctor-http-nio-3] o.s.cloud.gateway.rsocket.route.Routes   : Error applying predicate for route: 1

java.lang.NullPointerException: null
	at org.springframework.cloud.gateway.rsocket.routing.RoutingTable.find(RoutingTable.java:194) ~[spring-cloud-gateway-rsocket-broker-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
	at org.springframework.cloud.gateway.rsocket.routing.RoutingTable.findRouteIds(RoutingTable.java:154) ~[spring-cloud-gateway-rsocket-broker-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
	at org.springframework.cloud.gateway.rsocket.routing.RoutingTableRoutes$RoutIdPredicate.apply(RoutingTableRoutes.java:108) ~[spring-cloud-gateway-rsocket-broker-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
	at org.springframework.cloud.gateway.rsocket.routing.RoutingTableRoutes$RoutIdPredicate.apply(RoutingTableRoutes.java:92) ~[spring-cloud-gateway-rsocket-broker-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
	at org.springframework.cloud.gateway.rsocket.route.Routes.lambda$null$0(Routes.java:45) ~[spring-cloud-gateway-rsocket-broker-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
	at reactor.core.publisher.MonoFilterWhen$MonoFilterWhenMain.onNext(MonoFilterWhen.java:116) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2148) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.MonoFilterWhen$MonoFilterWhenMain.onSubscribe(MonoFilterWhen.java:103) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.Mono.subscribe(Mono.java:4087) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:441) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:211) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:139) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:63) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:55) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at io.rsocket.RSocketResponder.handleRequestResponse(RSocketResponder.java:387) ~[rsocket-core-1.0.0-RC5.jar:na]
	at io.rsocket.RSocketResponder.handleFrame(RSocketResponder.java:299) ~[rsocket-core-1.0.0-RC5.jar:na]
	at reactor.core.publisher.LambdaSubscriber.onNext(LambdaSubscriber.java:160) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxPeek$PeekSubscriber.onNext(FluxPeek.java:192) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.MonoFlatMapMany$FlatMapManyInner.onNext(MonoFlatMapMany.java:242) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxGroupBy$UnicastGroupedFlux.drainRegular(FluxGroupBy.java:554) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxGroupBy$UnicastGroupedFlux.drain(FluxGroupBy.java:630) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxGroupBy$UnicastGroupedFlux.subscribe(FluxGroupBy.java:696) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.Flux.subscribe(Flux.java:8134) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.MonoFlatMapMany$FlatMapManyMain.onNext(MonoFlatMapMany.java:188) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1592) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.MonoProcessor.onNext(MonoProcessor.java:317) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at io.rsocket.internal.ClientServerInputMultiplexer.lambda$new$1(ClientServerInputMultiplexer.java:116) ~[rsocket-core-1.0.0-RC5.jar:na]
	at reactor.core.publisher.LambdaSubscriber.onNext(LambdaSubscriber.java:160) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxGroupBy$GroupByMain.drainLoop(FluxGroupBy.java:380) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxGroupBy$GroupByMain.drain(FluxGroupBy.java:316) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxGroupBy$GroupByMain.onNext(FluxGroupBy.java:201) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxPeek$PeekSubscriber.onNext(FluxPeek.java:192) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:114) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:114) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.netty.channel.FluxReceive.drainReceiver(FluxReceive.java:206) ~[reactor-netty-0.9.0.RELEASE.jar:0.9.0.RELEASE]
	at reactor.netty.channel.FluxReceive.onInboundNext(FluxReceive.java:329) ~[reactor-netty-0.9.0.RELEASE.jar:0.9.0.RELEASE]
	at reactor.netty.channel.ChannelOperations.onInboundNext(ChannelOperations.java:348) ~[reactor-netty-0.9.0.RELEASE.jar:0.9.0.RELEASE]
	at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:91) ~[reactor-netty-0.9.0.RELEASE.jar:0.9.0.RELEASE]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:328) ~[netty-codec-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:302) ~[netty-codec-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1422) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:931) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:700) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:635) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:552) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:514) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor$6.run(SingleThreadEventExecutor.java:1044) ~[netty-common-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.42.Final.jar:4.1.42.Final]
	at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

2019-10-21 17:39:12.715 ERROR 20703 --- [ctor-http-nio-3] o.s.cloud.gateway.rsocket.route.Routes   : Error applying predicate for route: 400

java.lang.NullPointerException: null
	at org.springframework.cloud.gateway.rsocket.routing.RoutingTable.find(RoutingTable.java:194) ~[spring-cloud-gateway-rsocket-broker-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
	at org.springframework.cloud.gateway.rsocket.routing.RoutingTable.findRouteIds(RoutingTable.java:154) ~[spring-cloud-gateway-rsocket-broker-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
	at org.springframework.cloud.gateway.rsocket.routing.RoutingTableRoutes$RoutIdPredicate.apply(RoutingTableRoutes.java:108) ~[spring-cloud-gateway-rsocket-broker-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
	at org.springframework.cloud.gateway.rsocket.routing.RoutingTableRoutes$RoutIdPredicate.apply(RoutingTableRoutes.java:92) ~[spring-cloud-gateway-rsocket-broker-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
	at org.springframework.cloud.gateway.rsocket.route.Routes.lambda$null$0(Routes.java:45) ~[spring-cloud-gateway-rsocket-broker-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
	at reactor.core.publisher.MonoFilterWhen$MonoFilterWhenMain.onNext(MonoFilterWhen.java:116) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2148) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.MonoFilterWhen$MonoFilterWhenMain.onSubscribe(MonoFilterWhen.java:103) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.Mono.subscribe(Mono.java:4087) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:441) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:211) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:139) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:63) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:55) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at io.rsocket.RSocketResponder.handleRequestResponse(RSocketResponder.java:387) ~[rsocket-core-1.0.0-RC5.jar:na]
	at io.rsocket.RSocketResponder.handleFrame(RSocketResponder.java:299) ~[rsocket-core-1.0.0-RC5.jar:na]
	at reactor.core.publisher.LambdaSubscriber.onNext(LambdaSubscriber.java:160) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxPeek$PeekSubscriber.onNext(FluxPeek.java:192) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.MonoFlatMapMany$FlatMapManyInner.onNext(MonoFlatMapMany.java:242) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxGroupBy$UnicastGroupedFlux.drainRegular(FluxGroupBy.java:554) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxGroupBy$UnicastGroupedFlux.drain(FluxGroupBy.java:630) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxGroupBy$UnicastGroupedFlux.subscribe(FluxGroupBy.java:696) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.Flux.subscribe(Flux.java:8134) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.MonoFlatMapMany$FlatMapManyMain.onNext(MonoFlatMapMany.java:188) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1592) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.MonoProcessor.onNext(MonoProcessor.java:317) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at io.rsocket.internal.ClientServerInputMultiplexer.lambda$new$1(ClientServerInputMultiplexer.java:116) ~[rsocket-core-1.0.0-RC5.jar:na]
	at reactor.core.publisher.LambdaSubscriber.onNext(LambdaSubscriber.java:160) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxGroupBy$GroupByMain.drainLoop(FluxGroupBy.java:380) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxGroupBy$GroupByMain.drain(FluxGroupBy.java:316) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxGroupBy$GroupByMain.onNext(FluxGroupBy.java:201) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxPeek$PeekSubscriber.onNext(FluxPeek.java:192) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:114) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:114) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.netty.channel.FluxReceive.drainReceiver(FluxReceive.java:206) ~[reactor-netty-0.9.0.RELEASE.jar:0.9.0.RELEASE]
	at reactor.netty.channel.FluxReceive.onInboundNext(FluxReceive.java:329) ~[reactor-netty-0.9.0.RELEASE.jar:0.9.0.RELEASE]
	at reactor.netty.channel.ChannelOperations.onInboundNext(ChannelOperations.java:348) ~[reactor-netty-0.9.0.RELEASE.jar:0.9.0.RELEASE]
	at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:91) ~[reactor-netty-0.9.0.RELEASE.jar:0.9.0.RELEASE]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:328) ~[netty-codec-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:302) ~[netty-codec-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1422) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:931) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:700) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:635) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:552) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:514) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor$6.run(SingleThreadEventExecutor.java:1044) ~[netty-common-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.42.Final.jar:4.1.42.Final]
	at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

2019-10-21 17:39:12.715 ERROR 20703 --- [ctor-http-nio-3] o.s.cloud.gateway.rsocket.route.Routes   : Error applying predicate for route: 500

java.lang.NullPointerException: null
	at org.springframework.cloud.gateway.rsocket.routing.RoutingTable.find(RoutingTable.java:194) ~[spring-cloud-gateway-rsocket-broker-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
	at org.springframework.cloud.gateway.rsocket.routing.RoutingTable.findRouteIds(RoutingTable.java:154) ~[spring-cloud-gateway-rsocket-broker-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
	at org.springframework.cloud.gateway.rsocket.routing.RoutingTableRoutes$RoutIdPredicate.apply(RoutingTableRoutes.java:108) ~[spring-cloud-gateway-rsocket-broker-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
	at org.springframework.cloud.gateway.rsocket.routing.RoutingTableRoutes$RoutIdPredicate.apply(RoutingTableRoutes.java:92) ~[spring-cloud-gateway-rsocket-broker-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
	at org.springframework.cloud.gateway.rsocket.route.Routes.lambda$null$0(Routes.java:45) ~[spring-cloud-gateway-rsocket-broker-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
	at reactor.core.publisher.MonoFilterWhen$MonoFilterWhenMain.onNext(MonoFilterWhen.java:116) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2148) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.MonoFilterWhen$MonoFilterWhenMain.onSubscribe(MonoFilterWhen.java:103) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.Mono.subscribe(Mono.java:4087) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:441) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:211) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:139) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:63) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:55) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at io.rsocket.RSocketResponder.handleRequestResponse(RSocketResponder.java:387) ~[rsocket-core-1.0.0-RC5.jar:na]
	at io.rsocket.RSocketResponder.handleFrame(RSocketResponder.java:299) ~[rsocket-core-1.0.0-RC5.jar:na]
	at reactor.core.publisher.LambdaSubscriber.onNext(LambdaSubscriber.java:160) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxPeek$PeekSubscriber.onNext(FluxPeek.java:192) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.MonoFlatMapMany$FlatMapManyInner.onNext(MonoFlatMapMany.java:242) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxGroupBy$UnicastGroupedFlux.drainRegular(FluxGroupBy.java:554) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxGroupBy$UnicastGroupedFlux.drain(FluxGroupBy.java:630) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxGroupBy$UnicastGroupedFlux.subscribe(FluxGroupBy.java:696) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.Flux.subscribe(Flux.java:8134) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.MonoFlatMapMany$FlatMapManyMain.onNext(MonoFlatMapMany.java:188) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1592) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.MonoProcessor.onNext(MonoProcessor.java:317) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at io.rsocket.internal.ClientServerInputMultiplexer.lambda$new$1(ClientServerInputMultiplexer.java:116) ~[rsocket-core-1.0.0-RC5.jar:na]
	at reactor.core.publisher.LambdaSubscriber.onNext(LambdaSubscriber.java:160) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxGroupBy$GroupByMain.drainLoop(FluxGroupBy.java:380) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxGroupBy$GroupByMain.drain(FluxGroupBy.java:316) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxGroupBy$GroupByMain.onNext(FluxGroupBy.java:201) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxPeek$PeekSubscriber.onNext(FluxPeek.java:192) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:114) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:114) ~[reactor-core-3.3.0.RELEASE.jar:3.3.0.RELEASE]
	at reactor.netty.channel.FluxReceive.drainReceiver(FluxReceive.java:206) ~[reactor-netty-0.9.0.RELEASE.jar:0.9.0.RELEASE]
	at reactor.netty.channel.FluxReceive.onInboundNext(FluxReceive.java:329) ~[reactor-netty-0.9.0.RELEASE.jar:0.9.0.RELEASE]
	at reactor.netty.channel.ChannelOperations.onInboundNext(ChannelOperations.java:348) ~[reactor-netty-0.9.0.RELEASE.jar:0.9.0.RELEASE]
	at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:91) ~[reactor-netty-0.9.0.RELEASE.jar:0.9.0.RELEASE]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:328) ~[netty-codec-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:302) ~[netty-codec-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1422) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:931) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:700) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:635) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:552) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:514) ~[netty-transport-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor$6.run(SingleThreadEventExecutor.java:1044) ~[netty-common-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.42.Final.jar:4.1.42.Final]
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.42.Final.jar:4.1.42.Final]
	at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

To reproduce, proceed as follows:

1. start service-gateway
2. start reservation-service
3. start reservation-service-client
4. send POST request to http://localhost:6666/reservation/create/Michael

[FWinkler79]

Apparently, this is caused by an issue when the forwarding-metadata is read from the application.yml.

The problem is that the route of the endpoint that reservation-service exposes contains dots, create.reservation.{version}.

Specifying forwarding information in reservation-service-client's application.yml as follows:

spring:
  cloud:
    gateway:
      rsocket:
        client:
          forwarding:
            create.reservation.{version}:     # <-- here is the problem
              service_name: reservation-service
              canary: false

... causes the issue. After all, this is still yaml, and hence create.reservation.{version} is a kind of hierarchy that, I guess, is not properly handled internally. As a result the client does not send the proper routing metadata and the Gateway's routing table goes berserk.

I am leaving this issue open, since a NullPointer should not be thrown whatsoever.
But I will open another issue, that explains the issue (and provides a sample) with the dots in the route.

[spencergibb]

I'm positive it's not the dots since boots logging config supports them.

[spencergibb]

Turns out boot doesn't use config props for that, so, more investigation.

[spencergibb]

Here is the solution, it is based on boot's yaml parsing:

spring:
  cloud:
    gateway:
      rsocket:
        client:
          forwarding:
            "[create.reservation.{version}]":
              service_name: reservation-service
              canary: false

[FWinkler79]

Great, thanks a lot for investigating this.
I'd suggest to also add this to the future documentation of Spring Cloud RSocket as well, since it is definitely not straight forward to find and given that Spring Core RSocket's @MessageMapping advertises dotted routes, this will likely be a common problem. Additionally, with the NPE now caught, this will even silently fail if people configure the forwarding wrongly (like in my case).

Edit: Ok, sorry, just saw you already renamed my other issue and added the documentation tag to it.

[spencergibb]

See #4