I am having issue while connecting to Spring Boot RSocket application over TCP. The client when using RSocketRequester works fine but when I try to connect using RSocketFactory client it keep getting errors. Code below.
RSocket rSocket = this.client = RSocketFactory
.connect()
.mimeType(WellKnownMimeType.MESSAGE_RSOCKET_ROUTING.toString(), MediaType.APPLICATION_JSON_VALUE)
.frameDecoder(PayloadDecoder.ZERO_COPY)
.transport(TcpClientTransport.create("localhost", 7000))
.start()
.block();
Flux<Payload> s = rSocket.requestStream(DefaultPayload.create("1234", "socket"));
s.subscribe();
This gives error as below:
java.lang.IndexOutOfBoundsException: readerIndex(1) + length(115) exceeds writerIndex(6): AbstractPooledDerivedByteBuf$PooledNonRetainedSlicedByteBuf(ridx: 1, widx: 6, cap: 6/6, unwrapped: PooledUnsafeDirectByteBuf(ridx: 27, widx: 27, cap: 1024))
at io.netty.buffer.AbstractByteBuf.checkReadableBytes0(AbstractByteBuf.java:1477)
at io.netty.buffer.AbstractByteBuf.checkReadableBytes(AbstractByteBuf.java:1463)
at io.netty.buffer.AbstractByteBuf.readSlice(AbstractByteBuf.java:880)
at io.rsocket.metadata.TaggingMetadata$1.next(TaggingMetadata.java:47)
at io.rsocket.metadata.TaggingMetadata$1.next(TaggingMetadata.java:37)
at org.springframework.messaging.rsocket.DefaultMetadataExtractor.extractEntry(DefaultMetadataExtractor.java:136)
at org.springframework.messaging.rsocket.DefaultMetadataExtractor.extract(DefaultMetadataExtractor.java:119)
at org.springframework.messaging.rsocket.annotation.support.MessagingRSocket.createHeaders(MessagingRSocket.java:195)
at org.springframework.messaging.rsocket.annotation.support.MessagingRSocket.handleAndReply(MessagingRSocket.java:167)
at org.springframework.messaging.rsocket.annotation.support.MessagingRSocket.requestStream(MessagingRSocket.java:127)
at io.rsocket.RSocketResponder.requestStream(RSocketResponder.java:207)
at io.rsocket.RSocketResponder.handleFrame(RSocketResponder.java:310)
at reactor.core.publisher.LambdaSubscriber.onNext(LambdaSubscriber.java:160)
at reactor.core.publisher.MonoFlatMapMany$FlatMapManyInner.onNext(MonoFlatMapMany.java:242)
at reactor.core.publisher.FluxGroupBy$UnicastGroupedFlux.drainRegular(FluxGroupBy.java:554)
at reactor.core.publisher.FluxGroupBy$UnicastGroupedFlux.drain(FluxGroupBy.java:630)
at reactor.core.publisher.FluxGroupBy$UnicastGroupedFlux.subscribe(FluxGroupBy.java:696)
at reactor.core.publisher.Flux.subscribe(Flux.java:8174)
at reactor.core.publisher.MonoFlatMapMany$FlatMapManyMain.onNext(MonoFlatMapMany.java:188)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1637)
at reactor.core.publisher.MonoProcessor.onNext(MonoProcessor.java:317)
at io.rsocket.internal.ClientServerInputMultiplexer.lambda$new$1(ClientServerInputMultiplexer.java:116)
at reactor.core.publisher.LambdaSubscriber.onNext(LambdaSubscriber.java:160)
at reactor.core.publisher.FluxGroupBy$GroupByMain.drainLoop(FluxGroupBy.java:380)
at reactor.core.publisher.FluxGroupBy$GroupByMain.drain(FluxGroupBy.java:316)
at reactor.core.publisher.FluxGroupBy$GroupByMain.onNext(FluxGroupBy.java:201)
at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:114)
at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:114)
at reactor.netty.channel.FluxReceive.drainReceiver(FluxReceive.java:218)
at reactor.netty.channel.FluxReceive.onInboundNext(FluxReceive.java:351)
at reactor.netty.channel.ChannelOperations.onInboundNext(ChannelOperations.java:348)
at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:90)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:321)
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:295)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:714)
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650)
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.base/java.lang.Thread.run(Thread.java:830)
This particular error is as I understand is because of netty message wrapping (from other threads on stackoverflow) but how to solve it? The server is Spring Boot 5+ RSocket but the client is only using RSocket-Java.
From this, use the following to generate metadata.
CompositeByteBuf metadata = ByteBufAllocator.DEFAULT.compositeBuffer();
RoutingMetadata routingMetadata = TaggingMetadataCodec.createRoutingMetadata(ByteBufAllocator.DEFAULT, List.of("/route"));
CompositeMetadataCodec.encodeAndAddMetadata(metadata,
ByteBufAllocator.DEFAULT,
WellKnownMimeType.MESSAGE_RSOCKET_ROUTING,
routingMetadata.getContent());