This looks really odd. It looks like the client request is expecting there to be a request body, however the server request thinks the request is finished and there is no request body available. Is it possible an earlier handler is reading the request body so the proxy handler can't access it? Stuart On Sat, Sep 16, 2017 at 8:37 PM, Steve Hu <stevehu(a)gmail.com&gt; wrote: > Hi, > > I am trying to build a RESTful reverse proxy in order to wrap up APIs built > with other Java frameworks or other languages. The codebase is copied from > the reverse proxy example and I have a tutorial to document the steps to > reproduce the error. I am just wondering if there are anything I missed or > this is a bug. > > Thanks, > > Steve > > Here the tutorial > > https://networknt.github.io/light-proxy/tutorial/ > > And here is the error > > 14:04:03.357 [XNIO-1 I/O-1] ERROR io.undertow.proxy handleFailure - > UT005028: Proxy request to /v1/postData failed > io.undertow.server.TruncatedResponseException: null > at > io.undertow.client.http.HttpRequestConduit.truncateWrites( HttpRequestConduit.java:711) > at > io.undertow.conduits.AbstractFixedLengthStreamSinkC onduit.terminateWrites(AbstractFixedLengthStreamSinkConduit.java:256) > at > org.xnio.conduits.ConduitStreamSinkChannel.shutdownWrites( ConduitStreamSinkChannel.java:178) > at > io.undertow.channels.DetachableStreamSinkChannel.shutdownWrites( DetachableStreamSinkChannel.java:79) > at > io.undertow.server.handlers.proxy.ProxyHandler$ HTTPTrailerChannelListener.handleEvent(ProxyHandler.java:736) > at > io.undertow.server.handlers.proxy.ProxyHandler$ProxyAction$1.completed( ProxyHandler.java:628) > at > io.undertow.server.handlers.proxy.ProxyHandler$ProxyAction$1.completed( ProxyHandler.java:543) > at > io.undertow.client.http.HttpClientExchange.invokeReadReadyCallback( HttpClientExchange.java:212) > at > io.undertow.client.http.HttpClientConnection.initiateRequest( HttpClientConnection.java:418) > at > io.undertow.client.http.HttpClientConnection.sendRequest( HttpClientConnection.java:350) > at > io.undertow.server.handlers.proxy.ProxyHandler$ ProxyAction.run(ProxyHandler.java:543) > at io.undertow.util.SameThreadExecutor.execute( SameThreadExecutor.java:35) > at > io.undertow.server.HttpServerExchange.dispatch( HttpServerExchange.java:797) > at > io.undertow.server.handlers.proxy.ProxyHandler$ ProxyClientHandler.completed(ProxyHandler.java:298) > at > io.undertow.server.handlers.proxy.ProxyHandler$ ProxyClientHandler.completed(ProxyHandler.java:272) > at > io.undertow.server.handlers.proxy.ProxyConnectionPool.connectionReady( ProxyConnectionPool.java:338) > at > io.undertow.server.handlers.proxy.ProxyConnectionPool.access$900( ProxyConnectionPool.java:61) > at > io.undertow.server.handlers.proxy.ProxyConnectionPool$2. completed(ProxyConnectionPool.java:286) > at > io.undertow.server.handlers.proxy.ProxyConnectionPool$2. completed(ProxyConnectionPool.java:273) > at > io.undertow.client.http.HttpClientProvider.handleConnected( HttpClientProvider.java:156) > at > io.undertow.client.http.HttpClientProvider.access$000( HttpClientProvider.java:51) > at > io.undertow.client.http.HttpClientProvider$2.handleEvent( HttpClientProvider.java:127) > at > io.undertow.client.http.HttpClientProvider$2.handleEvent( HttpClientProvider.java:124) > at org.xnio.ChannelListeners.invokeChannelListener( ChannelListeners.java:92) > at > org.xnio.nio.WorkerThread$ConnectHandle.handleReady( WorkerThread.java:326) > at org.xnio.nio.WorkerThread.run(WorkerThread.java:561) > 14:05:03.462 [XNIO-1 I/O-1] ERROR io.undertow.proxy handleFailure - > UT005028: Proxy request to /v1/postData failed > java.io.IOException: UT001000: Connection closed > at > io.undertow.client.http.HttpClientConnection$ClientReadListener. handleEvent(HttpClientConnection.java:573) > at > io.undertow.client.http.HttpClientConnection$ClientReadListener. handleEvent(HttpClientConnection.java:511) > at org.xnio.ChannelListeners.invokeChannelListener( ChannelListeners.java:92) > at > org.xnio.conduits.ReadReadyHandler$ChannelListenerHandler. readReady(ReadReadyHandler.java:66) > at org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:88) > at org.xnio.nio.WorkerThread.run(WorkerThread.java:561) > > > > _______________________________________________ > undertow-dev mailing list > undertow-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/undertow-dev

Have a look at io.undertow.server.Connectors#ungetRequestBytes(), it should do what you are after. Stuart On Mon, Sep 18, 2017 at 12:50 PM, Steve Hu <stevehu(a)gmail.com&gt; wrote: > Thanks Stuart. My bad :( I had a body parser handler in the request/response > chain in order to do schema validation on body against swagger specification > and it consumed the body stream on the proxy server. Is there a way I can > consume the body and put the body stream back so that other downstream > handler can still parse the body if needed? > > Steve > > On Mon, Sep 18, 2017 at 1:13 AM, Stuart Douglas <sdouglas(a)redhat.com&gt; wrote: >> >> This looks really odd. It looks like the client request is expecting >> there to be a request body, however the server request thinks the >> request is finished and there is no request body available. Is it >> possible an earlier handler is reading the request body so the proxy >> handler can't access it? >> >> Stuart >> >> On Sat, Sep 16, 2017 at 8:37 PM, Steve Hu <stevehu(a)gmail.com&gt; wrote: >> > Hi, >> > >> > I am trying to build a RESTful reverse proxy in order to wrap up APIs >> > built >> > with other Java frameworks or other languages. The codebase is copied >> > from >> > the reverse proxy example and I have a tutorial to document the steps to >> > reproduce the error. I am just wondering if there are anything I missed >> > or >> > this is a bug. >> > >> > Thanks, >> > >> > Steve >> > >> > Here the tutorial >> > >> > https://networknt.github.io/light-proxy/tutorial/ >> > >> > And here is the error >> > >> > 14:04:03.357 [XNIO-1 I/O-1] ERROR io.undertow.proxy handleFailure - >> > UT005028: Proxy request to /v1/postData failed >> > io.undertow.server.TruncatedResponseException: null >> > at >> > >> > io.undertow.client.http.HttpRequestConduit.truncateWrites( HttpRequestConduit.java:711) >> > at >> > >> > io.undertow.conduits.AbstractFixedLengthStreamSinkC onduit.terminateWrites(AbstractFixedLengthStreamSinkConduit.java:256) >> > at >> > >> > org.xnio.conduits.ConduitStreamSinkChannel.shutdownWrites( ConduitStreamSinkChannel.java:178) >> > at >> > >> > io.undertow.channels.DetachableStreamSinkChannel.shutdownWrites( DetachableStreamSinkChannel.java:79) >> > at >> > >> > io.undertow.server.handlers.proxy.ProxyHandler$ HTTPTrailerChannelListener.handleEvent(ProxyHandler.java:736) >> > at >> > >> > io.undertow.server.handlers.proxy.ProxyHandler$ ProxyAction$1.completed(ProxyHandler.java:628) >> > at >> > >> > io.undertow.server.handlers.proxy.ProxyHandler$ ProxyAction$1.completed(ProxyHandler.java:543) >> > at >> > >> > io.undertow.client.http.HttpClientExchange.invokeReadReadyCallback( HttpClientExchange.java:212) >> > at >> > >> > io.undertow.client.http.HttpClientConnection.initiateRequest( HttpClientConnection.java:418) >> > at >> > >> > io.undertow.client.http.HttpClientConnection.sendRequest( HttpClientConnection.java:350) >> > at >> > >> > io.undertow.server.handlers.proxy.ProxyHandler$ ProxyAction.run(ProxyHandler.java:543) >> > at >> > io.undertow.util.SameThreadExecutor.execute( SameThreadExecutor.java:35) >> > at >> > >> > io.undertow.server.HttpServerExchange.dispatch( HttpServerExchange.java:797) >> > at >> > >> > io.undertow.server.handlers.proxy.ProxyHandler$ ProxyClientHandler.completed(ProxyHandler.java:298) >> > at >> > >> > io.undertow.server.handlers.proxy.ProxyHandler$ ProxyClientHandler.completed(ProxyHandler.java:272) >> > at >> > >> > io.undertow.server.handlers.proxy.ProxyConnectionPool. connectionReady(ProxyConnectionPool.java:338) >> > at >> > >> > io.undertow.server.handlers.proxy.ProxyConnectionPool.access$900( ProxyConnectionPool.java:61) >> > at >> > >> > io.undertow.server.handlers.proxy.ProxyConnectionPool$2. completed(ProxyConnectionPool.java:286) >> > at >> > >> > io.undertow.server.handlers.proxy.ProxyConnectionPool$2. completed(ProxyConnectionPool.java:273) >> > at >> > >> > io.undertow.client.http.HttpClientProvider.handleConnected( HttpClientProvider.java:156) >> > at >> > >> > io.undertow.client.http.HttpClientProvider.access$000( HttpClientProvider.java:51) >> > at >> > >> > io.undertow.client.http.HttpClientProvider$2.handleEvent( HttpClientProvider.java:127) >> > at >> > >> > io.undertow.client.http.HttpClientProvider$2.handleEvent( HttpClientProvider.java:124) >> > at >> > org.xnio.ChannelListeners.invokeChannelListener( ChannelListeners.java:92) >> > at >> > >> > org.xnio.nio.WorkerThread$ConnectHandle.handleReady( WorkerThread.java:326) >> > at org.xnio.nio.WorkerThread.run(WorkerThread.java:561) >> > 14:05:03.462 [XNIO-1 I/O-1] ERROR io.undertow.proxy handleFailure - >> > UT005028: Proxy request to /v1/postData failed >> > java.io.IOException: UT001000: Connection closed >> > at >> > >> > io.undertow.client.http.HttpClientConnection$ClientReadListener. handleEvent(HttpClientConnection.java:573) >> > at >> > >> > io.undertow.client.http.HttpClientConnection$ClientReadListener. handleEvent(HttpClientConnection.java:511) >> > at >> > org.xnio.ChannelListeners.invokeChannelListener( ChannelListeners.java:92) >> > at >> > >> > org.xnio.conduits.ReadReadyHandler$ChannelListenerHandler. readReady(ReadReadyHandler.java:66) >> > at org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit. java:88) >> > at org.xnio.nio.WorkerThread.run(WorkerThread.java:561) >> > >> > >> > >> > _______________________________________________ >> > undertow-dev mailing list >> > undertow-dev(a)lists.jboss.org >> > https://lists.jboss.org/mailman/listinfo/undertow-dev > >