[undertow-dev] StreamSinkChannel - repeatable writes error

[Stuart Douglas]

This should be fixed in the XNIO upstream:

https://github.com/xnio/xnio/commit/5a1ed9dff29455d78bc9beb50c6e448e1bbb6ef9

David, would we be able to get another XNIO release soonish?

Stuart

Matej Lazar wrote:
> Hi, I'm writing an http server for Ceylon on top of undertow.
>
> All bytes are written to response and successfully transferred, but exception bellow occurs when shutdownWrites is called.
>
> Stepping through a "write" method of FixedLengthStreamSinkChannel, looks like "state" is not updated correctly, it is always subtracted only for are number of bytes written in one loop.
>
> Am I missing something or is it a bug ?
>
> byte array size is 6919638, usually there are 147456 bytes written to a response in a loop
>
> My code for writing bytes to response ... not quite Java, but readable ;)
>
>      shared actual void writeBytes(Array<Integer>  bytes) {
>          //ByteBuffer.wrap
> 	value bb = wrapByteBuffer(bytes);
> 	value response = getResponse();
> 			
> 	variable Integer remaining := bytes.size;       	
>          while (remaining>  0) {
> 		variable Integer written := 0;	
> 		while((written := response.write(bb))>  0) {
> 			remaining -= written;
> 			try {
> 				response.awaitWritable();
> 			} catch(JIOException e) {
> 				//TODO
> 				print(e);
> 			}
> 		}
> 	}
>      }
>
>
> Exception in thread "XNIO-1 task-2" java.lang.Error: org.xnio.channels.FixedLengthUnderflowException: 6815744 bytes remaining
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> 	at java.lang.Thread.run(Thread.java:722)
> Caused by: org.xnio.channels.FixedLengthUnderflowException: 6815744 bytes remaining
> 	at org.xnio.channels.FixedLengthStreamSinkChannel.shutdownWrites(FixedLengthStreamSinkChannel.java:291)
> 	at ceylon.net.httpd.internal.HttpResponseImpl.responseDone(HttpResponseImpl.ceylon:71)
> 	at ceylon.net.httpd.internal.CeylonRequestHandler$AsyncInvoker$1completionHandler_.handleComplete(CeylonRequestHandler.ceylon:56)
> 	at ceylon.net.httpd.endpoints.StaticFileEndpoint.service(StaticFileEndpoint.ceylon:50)
> 	at ceylon.net.httpd.internal.CeylonRequestHandler$AsyncInvoker.run(CeylonRequestHandler.ceylon:60)
> 	at io.undertow.util.WorkerDispatcher$1.run(WorkerDispatcher.java:49)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> 	... 2 more
>
>
> Thanks,
> Matej.
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