[undertow-dev] Gzip and Proxy

Hi all, I've seem to have hit a bug in undertow when combining proxying and gzip. I'm trying to use undertow as a reverse-proxy and also compressing the result when clients support it. Undertow-code below. * Proxying without compressing works fine (curl -v localhost:8099/proxy) * Compressing content that is not proxied works fine (curl -v --compress localhost:8099/local) * Proxy and compression just hangs. Not even headers are received (curl -v --compress localhost:8099/proxy) Trying to debug what's going on I found that the GzipStreamSinkConduit receives all content but is never flushed. The call sequence for GzipStreamSinkConduit for proxied content is: write(ByteBuffer src) - all context from the proxied app is written. wakeupWrites() - which basically does nothing. Ends up in DeflatingStreamSinkConduit.queueWriteListener() which calls any WriteReadyHandlers but there are none. Any clues? My code to setup undertow: final PathHandler pathHandler = Handlers.path(); pathHandler.addExactPath("/local", new HttpHandler() { @Override public void handleRequest(HttpServerExchange exchange) throws Exception { exchange.getResponseHeaders().put(Headers.CONTENT_TYPE, "text/plain"); exchange.getResponseSender().send("Hello World"); } }); pathHandler.addPrefixPath("/proxy", new ProxyHandler( new SimpleProxyClientProvider(new URI("http://localhost:8060/menu")), ResponseCodeHandler.HANDLE_404)); final EncodingHandler handler = new EncodingHandler(pathHandler, new ContentEncodingRepository() .addEncodingHandler("gzip", new GzipEncodingProvider(), 50, Predicates.truePredicate())); Undertow.builder() .addHttpListener(8099, "0.0.0.0") .setHandler(handler) .build().start(); -- Br, Martin Andersson Purple Scout AB +46 732 05 14 01