[undertow-dev] Deadlock in JSP page on Wilflfy 8.0 Alpha 4 with umlauts

Stuart Douglas sdouglas at redhat.com
Thu Aug 29 05:00:14 EDT 2013 

This should be fixed in Undertow upstream. The writer will now error out properly on unmappable characters. You will need to set a response charset of UTF8 (or some other appropriate charset) in order for this to work correctly.

The only thing I am not sure about is if this should be a fatal error, or if we should just write the unmappable characters directly to the output.

Stuart

----- Original Message -----
> From: "Stuart Douglas" <sdouglas at redhat.com>
> To: "Wolfgang Knauf" <wolfgang.knauf at gmx.de>
> Cc: undertow-dev at lists.jboss.org
> Sent: Wednesday, 28 August, 2013 10:33:35 PM
> Subject: Re: [undertow-dev] Deadlock in JSP page on Wilflfy 8.0 Alpha 4	with	umlauts
> 
> Thanks for reporting this, I will look into it.
> 
> Stuart
> 
> ----- Original Message -----
> > From: "Wolfgang Knauf" <wolfgang.knauf at gmx.de>
> > To: undertow-dev at lists.jboss.org
> > Sent: Wednesday, 28 August, 2013 10:28:24 PM
> > Subject: [undertow-dev] Deadlock in JSP page on Wilflfy 8.0 Alpha 4 with
> > 	umlauts
> > 
> > Hi all,
> > 
> > hope this is the right place and the correct component to post a
> > possible Undertow bug:
> > I have a simple EAR application, used to test the JavaEE feature of a
> > one-to-many-relationship. It contains an EJB jar and a WAR file, bundled
> > in an EAR file.
> > 
> > Whenever I add an umlaut in an input field and submit the form, WildFly
> > hangs up while processing the request to display the result page (which
> > should display a list of my entities). As this happens when generating
> > the JSP page, I assume an Undertow issue.
> > 
> > To reproduce:
> > 1) deploy "KuchenZutat.ear" to WildFly (it uses the
> > "java:jboss/datasources/ExampleDS", so no configuration changes needed).
> > 2) browse to "http://localhost:8080/KuchenZutatWeb/"
> > 3) Klick "Neu"
> > 4) enter something with an umlaut, e.g. "Käsekuchen"
> > 5) click OK
> > Now the server hangs.
> > 
> > It works when avoiding umlauts.
> > 
> > Here are two stack traces, which I took by debugging the server with
> > Eclipse and breaking into debugger at random times. Note that the thread
> > name is different in the two stack traces - I took them at different
> > server runs.
> > "CoderResult.unmappableForLength()" seems to be the place for the
> > endless loop.
> > 
> > 
> > Thread [default task-3] (Suspended)
> > 	owns: CoderResult$2  (id=285)
> > 	HashMap<K,V>.hash(Object) line: not available
> > 	HashMap<K,V>.getEntry(Object) line: not available
> > 	HashMap<K,V>.get(Object) line: not available
> > 	CoderResult$2(CoderResult$Cache).get(int) line: not available
> > 	CoderResult$Cache.access$200(CoderResult$Cache, int) line: not available
> > 	CoderResult.unmappableForLength(int) line: not available
> > 	Surrogate$Parser.unmappableResult() line: not available
> > 	ISO_8859_1$Encoder.encodeBufferLoop(CharBuffer, ByteBuffer) line: not
> > available
> > 	ISO_8859_1$Encoder.encodeLoop(CharBuffer, ByteBuffer) line: not available
> > 	ISO_8859_1$Encoder(CharsetEncoder).encode(CharBuffer, ByteBuffer,
> > boolean) line: not available
> > 	ServletPrintWriter.write(CharBuffer) line: 58
> > 	ServletPrintWriter.write(char[], int, int) line: 76
> > 	ServletPrintWriterDelegate.write(char[], int, int) line: 96
> > 	JspWriterImpl.flushBuffer() line: 120
> > 	PageContextImpl.release() line: 188
> > 	JspFactoryImpl.internalReleasePageContext(PageContext) line: 115
> > 	JspFactoryImpl.releasePageContext(PageContext) line: 74
> > 	index.jsp line: not available
> > 	index_jsp(HttpJspBase).service(HttpServletRequest, HttpServletResponse)
> > line: 69
> > 	index_jsp(HttpServlet).service(ServletRequest, ServletResponse) line: 790
> > 	JspServletWrapper.service(HttpServletRequest, HttpServletResponse,
> > boolean) line: 365
> > 	JspServlet.serviceJspFile(HttpServletRequest, HttpServletResponse,
> > String, Throwable, boolean) line: 321
> > 	JspServlet.service(HttpServletRequest, HttpServletResponse) line: 254
> > 	JspServlet(HttpServlet).service(ServletRequest, ServletResponse) line: 790
> > 	ServletHandler.handleRequest(HttpServerExchange) line: 87
> > 	FilterHandler.handleRequest(HttpServerExchange) line: 82
> > 	ServletSecurityRoleHandler.handleRequest(HttpServerExchange) line: 54
> > 	ServletDispatchingHandler.handleRequest(HttpServerExchange) line: 36
> > 	SecurityContextAssociationHandler.handleRequest(HttpServerExchange)
> > line: 78
> > 	PredicateHandler.handleRequest(HttpServerExchange) line: 25
> > 	PredicateHandler.handleRequest(HttpServerExchange) line: 25
> > 	ServletInitialHandler.dispatchRequest(HttpServerExchange,
> > ServletRequestContext, ServletChain, DispatcherType) line: 196
> > 	ServletInitialHandler.dispatchToPath(HttpServerExchange,
> > ServletPathMatch, DispatcherType) line: 139
> > 	RequestDispatcherImpl.forward(ServletRequest, ServletResponse) line: 156
> > 	KuchenEdit.jsp line: 40
> > 	KuchenEdit_jsp(HttpJspBase).service(HttpServletRequest,
> > HttpServletResponse) line: 69
> > 	KuchenEdit_jsp(HttpServlet).service(ServletRequest, ServletResponse)
> > line: 790
> > 	JspServletWrapper.service(HttpServletRequest, HttpServletResponse,
> > boolean) line: 365
> > 	JspServlet.serviceJspFile(HttpServletRequest, HttpServletResponse,
> > String, Throwable, boolean) line: 321
> > 	JspServlet.service(HttpServletRequest, HttpServletResponse) line: 254
> > 	JspServlet(HttpServlet).service(ServletRequest, ServletResponse) line: 790
> > 	ServletHandler.handleRequest(HttpServerExchange) line: 87
> > 	FilterHandler$FilterChainImpl.doFilter(ServletRequest, ServletResponse)
> > line: 130
> > 	JsrWebSocketFilter.doFilter(ServletRequest, ServletResponse,
> > FilterChain) line: 136
> > 	ManagedFilter.doFilter(ServletRequest, ServletResponse, FilterChain)
> > line: 56
> > 	FilterHandler$FilterChainImpl.doFilter(ServletRequest, ServletResponse)
> > line: 132
> > 	JsrWebSocketFilter.doFilter(ServletRequest, ServletResponse,
> > FilterChain) line: 136
> > 	ManagedFilter.doFilter(ServletRequest, ServletResponse, FilterChain)
> > line: 56
> > 	FilterHandler$FilterChainImpl.doFilter(ServletRequest, ServletResponse)
> > line: 132
> > 	FilterHandler.handleRequest(HttpServerExchange) line: 85
> > 	ServletSecurityRoleHandler.handleRequest(HttpServerExchange) line: 56
> > 	ServletDispatchingHandler.handleRequest(HttpServerExchange) line: 36
> > 	SecurityContextAssociationHandler.handleRequest(HttpServerExchange)
> > line: 78
> > 	SSLInformationAssociationHandler.handleRequest(HttpServerExchange)
> > line: 113
> > 	AuthenticationCallHandler.handleRequest(HttpServerExchange) line: 52
> > 	ServletConfidentialityConstraintHandler(AbstractConfidentialityHandler).handleRequest(HttpServerExchange)
> > 	line: 45
> > 	CachedAuthenticatedSessionHandler.handleRequest(HttpServerExchange)
> > line: 65
> > 	SecurityInitialHandler.handleRequest(HttpServerExchange) line: 70
> > 	PredicateHandler.handleRequest(HttpServerExchange) line: 25
> > 	SecurityContextCreationHandler.handleRequest(HttpServerExchange) line: 54
> > 	PredicateHandler.handleRequest(HttpServerExchange) line: 25
> > 	ServletInitialHandler.handleFirstRequest(HttpServerExchange,
> > ServletChain, ServletRequestContext, ServletRequest, ServletResponse)
> > line: 207
> > 	ServletInitialHandler.dispatchRequest(HttpServerExchange,
> > ServletRequestContext, ServletChain, DispatcherType) line: 194
> > 	ServletInitialHandler.access$000(ServletInitialHandler,
> > HttpServerExchange, ServletRequestContext, ServletChain, DispatcherType)
> > line: 72
> > 	ServletInitialHandler$1.handleRequest(HttpServerExchange) line: 128
> > 	HttpHandlers.executeRootHandler(HttpHandler, HttpServerExchange,
> > boolean) line: 36
> > 	HttpServerExchange$1.run() line: 628
> > 	XnioWorker$TaskPool(ThreadPoolExecutor).runWorker(ThreadPoolExecutor$Worker)
> > 	line: not available
> > 	ThreadPoolExecutor$Worker.run() line: not available
> > 	Thread.run() line: not available
> > 
> > 
> > 
> > 
> > 
> > 
> > Thread [default task-8] (Suspended)
> > 	CoderResult$Cache.access$200(CoderResult$Cache, int) line: not available
> > 	CoderResult.unmappableForLength(int) line: not available
> > 	Surrogate$Parser.unmappableResult() line: not available
> > 	ISO_8859_1$Encoder.encodeBufferLoop(CharBuffer, ByteBuffer) line: not
> > available
> > 	ISO_8859_1$Encoder.encodeLoop(CharBuffer, ByteBuffer) line: not available
> > 	ISO_8859_1$Encoder(CharsetEncoder).encode(CharBuffer, ByteBuffer,
> > boolean) line: not available
> > 	ServletPrintWriter.write(CharBuffer) line: 58
> > 	ServletPrintWriter.write(char[], int, int) line: 76
> > 	ServletPrintWriterDelegate.write(char[], int, int) line: 96
> > 	JspWriterImpl.flushBuffer() line: 120
> > 	PageContextImpl.release() line: 188
> > 	JspFactoryImpl.internalReleasePageContext(PageContext) line: 115
> > 	JspFactoryImpl.releasePageContext(PageContext) line: 74
> > 	Kuchen.jsp line: not available
> > 	Kuchen_jsp(HttpJspBase).service(HttpServletRequest,
> > HttpServletResponse) line: 69
> > 	Kuchen_jsp(HttpServlet).service(ServletRequest, ServletResponse) line: 790
> > 	JspServletWrapper.service(HttpServletRequest, HttpServletResponse,
> > boolean) line: 365
> > 	JspServlet.serviceJspFile(HttpServletRequest, HttpServletResponse,
> > String, Throwable, boolean) line: 321
> > 	JspServlet.service(HttpServletRequest, HttpServletResponse) line: 254
> > 	JspServlet(HttpServlet).service(ServletRequest, ServletResponse) line: 790
> > 	ServletHandler.handleRequest(HttpServerExchange) line: 87
> > 	FilterHandler.handleRequest(HttpServerExchange) line: 82
> > 	ServletSecurityRoleHandler.handleRequest(HttpServerExchange) line: 54
> > 	ServletDispatchingHandler.handleRequest(HttpServerExchange) line: 36
> > 	SecurityContextAssociationHandler.handleRequest(HttpServerExchange)
> > line: 78
> > 	PredicateHandler.handleRequest(HttpServerExchange) line: 25
> > 	PredicateHandler.handleRequest(HttpServerExchange) line: 25
> > 	ServletInitialHandler.dispatchRequest(HttpServerExchange,
> > ServletRequestContext, ServletChain, DispatcherType) line: 196
> > 	ServletInitialHandler.dispatchToPath(HttpServerExchange,
> > ServletPathMatch, DispatcherType) line: 139
> > 	RequestDispatcherImpl.forward(ServletRequest, ServletResponse) line: 156
> > 	KuchenEdit.jsp line: 43
> > 	KuchenEdit_jsp(HttpJspBase).service(HttpServletRequest,
> > HttpServletResponse) line: 69
> > 	KuchenEdit_jsp(HttpServlet).service(ServletRequest, ServletResponse)
> > line: 790
> > 	JspServletWrapper.service(HttpServletRequest, HttpServletResponse,
> > boolean) line: 365
> > 	JspServlet.serviceJspFile(HttpServletRequest, HttpServletResponse,
> > String, Throwable, boolean) line: 321
> > 	JspServlet.service(HttpServletRequest, HttpServletResponse) line: 254
> > 	JspServlet(HttpServlet).service(ServletRequest, ServletResponse) line: 790
> > 	ServletHandler.handleRequest(HttpServerExchange) line: 87
> > 	FilterHandler$FilterChainImpl.doFilter(ServletRequest, ServletResponse)
> > line: 130
> > 	JsrWebSocketFilter.doFilter(ServletRequest, ServletResponse,
> > FilterChain) line: 136
> > 	ManagedFilter.doFilter(ServletRequest, ServletResponse, FilterChain)
> > line: 56
> > 	FilterHandler$FilterChainImpl.doFilter(ServletRequest, ServletResponse)
> > line: 132
> > 	JsrWebSocketFilter.doFilter(ServletRequest, ServletResponse,
> > FilterChain) line: 136
> > 	ManagedFilter.doFilter(ServletRequest, ServletResponse, FilterChain)
> > line: 56
> > 	FilterHandler$FilterChainImpl.doFilter(ServletRequest, ServletResponse)
> > line: 132
> > 	FilterHandler.handleRequest(HttpServerExchange) line: 85
> > 	ServletSecurityRoleHandler.handleRequest(HttpServerExchange) line: 56
> > 	ServletDispatchingHandler.handleRequest(HttpServerExchange) line: 36
> > 	SecurityContextAssociationHandler.handleRequest(HttpServerExchange)
> > line: 78
> > 	SSLInformationAssociationHandler.handleRequest(HttpServerExchange)
> > line: 113
> > 	AuthenticationCallHandler.handleRequest(HttpServerExchange) line: 52
> > 	ServletConfidentialityConstraintHandler(AbstractConfidentialityHandler).handleRequest(HttpServerExchange)
> > 	line: 45
> > 	CachedAuthenticatedSessionHandler.handleRequest(HttpServerExchange)
> > line: 65
> > 	SecurityInitialHandler.handleRequest(HttpServerExchange) line: 70
> > 	PredicateHandler.handleRequest(HttpServerExchange) line: 25
> > 	SecurityContextCreationHandler.handleRequest(HttpServerExchange) line: 54
> > 	PredicateHandler.handleRequest(HttpServerExchange) line: 25
> > 	ServletInitialHandler.handleFirstRequest(HttpServerExchange,
> > ServletChain, ServletRequestContext, ServletRequest, ServletResponse)
> > line: 207
> > 	ServletInitialHandler.dispatchRequest(HttpServerExchange,
> > ServletRequestContext, ServletChain, DispatcherType) line: 194
> > 	ServletInitialHandler.access$000(ServletInitialHandler,
> > HttpServerExchange, ServletRequestContext, ServletChain, DispatcherType)
> > line: 72
> > 	ServletInitialHandler$1.handleRequest(HttpServerExchange) line: 128
> > 	HttpHandlers.executeRootHandler(HttpHandler, HttpServerExchange,
> > boolean) line: 36
> > 	HttpServerExchange$1.run() line: 628
> > 	XnioWorker$TaskPool(ThreadPoolExecutor).runWorker(ThreadPoolExecutor$Worker)
> > 	line: not available
> > 	ThreadPoolExecutor$Worker.run() line: not available
> > 	Thread.run() line: not available
> > 
> > 
> > Best regards
> > 
> > Wolfgang Knauf
> > 
> > _______________________________________________
> > undertow-dev mailing list
> > undertow-dev at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/undertow-dev
> 
> _______________________________________________
> undertow-dev mailing list
> undertow-dev at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/undertow-dev

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