[undertow-dev] StackOverflowError on AbstractFramedChannel

[Stuart Douglas]

Looks like it is an exception that can occur when a server is being
shut down. The close listener attempts to queue a task in the IO
thread, but it is rejected because of the shutdown. It then executes
it directly in the current thread, which results in another attempted
dispatch.

I have created: https://issues.jboss.org/browse/UNDERTOW-791

Should be an easy fix, and should not actually cause any issues
because the server is being shut down anyway (at worst you might miss
an OnClose notification).

Stuart

On Wed, Aug 3, 2016 at 12:34 PM, electrotype <electrotype at gmail.com> wrote:
> Hi,
>
> Using Undertow 1.3.23.Final, I sometimes get this error, when running my
> WebSocket tests :
>
> ------------------------------------------
>
> 2016-08-02 21:56:15 [ERROR] XNIO001007: A channel event listener threw an
> exception ~ Caller+0   at
> org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:94)
> java.lang.StackOverflowError: null
>         at
> ch.qos.logback.classic.pattern.ThrowableProxyConverter.subjoinSTEPArray(ThrowableProxyConverter.java:197)
>         at
> ch.qos.logback.classic.pattern.ThrowableProxyConverter.recursiveAppend(ThrowableProxyConverter.java:161)
>         at
> ch.qos.logback.classic.pattern.ThrowableProxyConverter.throwableProxyToString(ThrowableProxyConverter.java:151)
>         at
> ch.qos.logback.classic.pattern.ThrowableProxyConverter.convert(ThrowableProxyConverter.java:145)
>         at
> ch.qos.logback.classic.pattern.ThrowableProxyConverter.convert(ThrowableProxyConverter.java:1)
>         at
> ch.qos.logback.core.pattern.FormattingConverter.write(FormattingConverter.java:36)
>         at
> ch.qos.logback.core.pattern.PatternLayoutBase.writeLoopOnConverters(PatternLayoutBase.java:114)
>         at
> ch.qos.logback.classic.PatternLayout.doLayout(PatternLayout.java:141)
>         at
> ch.qos.logback.classic.PatternLayout.doLayout(PatternLayout.java:1)
>         at
> ch.qos.logback.core.encoder.LayoutWrappingEncoder.doEncode(LayoutWrappingEncoder.java:130)
>         at
> ch.qos.logback.core.OutputStreamAppender.writeOut(OutputStreamAppender.java:187)
>         at
> ch.qos.logback.core.OutputStreamAppender.subAppend(OutputStreamAppender.java:212)
>         at
> ch.qos.logback.core.OutputStreamAppender.append(OutputStreamAppender.java:100)
>         at
> ch.qos.logback.core.UnsynchronizedAppenderBase.doAppend(UnsynchronizedAppenderBase.java:84)
>         at
> ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:48)
>         at
> ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:270)
>         at ch.qos.logback.classic.Logger.callAppenders(Logger.java:257)
>         at
> ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:421)
>         at
> ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:383)
>         at ch.qos.logback.classic.Logger.log(Logger.java:765)
>         at sun.reflect.GeneratedMethodAccessor22.invoke(Unknown Source)
>         at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>         at java.lang.reflect.Method.invoke(Method.java:497)
>         at
> org.jboss.logging.Slf4jLocationAwareLogger.doLog(Slf4jLocationAwareLogger.java:89)
>         at
> org.jboss.logging.Slf4jLocationAwareLogger.doLogf(Slf4jLocationAwareLogger.java:82)
>         at org.jboss.logging.Logger.logf(Logger.java:2445)
>         at
> org.xnio._private.Messages_$logger.listenerException(Messages_$logger.java:923)
>         at
> org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:94)
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel$FrameCloseListener$2.run(AbstractFramedChannel.java:981)
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel.runInIoThread(AbstractFramedChannel.java:235)
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel$FrameCloseListener.handleEvent(AbstractFramedChannel.java:978)
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel$FrameCloseListener.handleEvent(AbstractFramedChannel.java:937)
>         at
> org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel$FrameCloseListener$2.run(AbstractFramedChannel.java:981)
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel.runInIoThread(AbstractFramedChannel.java:235)
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel$FrameCloseListener.handleEvent(AbstractFramedChannel.java:978)
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel$FrameCloseListener.handleEvent(AbstractFramedChannel.java:937)
>         at
> org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel$FrameCloseListener$2.run(AbstractFramedChannel.java:981)
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel.runInIoThread(AbstractFramedChannel.java:235)
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel$FrameCloseListener.handleEvent(AbstractFramedChannel.java:978)
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel$FrameCloseListener.handleEvent(AbstractFramedChannel.java:937)
>         at
> org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel$FrameCloseListener$2.run(AbstractFramedChannel.java:981)
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel.runInIoThread(AbstractFramedChannel.java:235)
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel$FrameCloseListener.handleEvent(AbstractFramedChannel.java:978)
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel$FrameCloseListener.handleEvent(AbstractFramedChannel.java:937)
>         at
> org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel$FrameCloseListener$2.run(AbstractFramedChannel.java:981)
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel.runInIoThread(AbstractFramedChannel.java:235)
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel$FrameCloseListener.handleEvent(AbstractFramedChannel.java:978)
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel$FrameCloseListener.handleEvent(AbstractFramedChannel.java:937)
>         at
> org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
>         ...
> ------------------------------------------
>
> The
> ------------------------------------------
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel$FrameCloseListener$2.run(AbstractFramedChannel.java:981)
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel.runInIoThread(AbstractFramedChannel.java:235)
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel$FrameCloseListener.handleEvent(AbstractFramedChannel.java:978)
>         at
> io.undertow.server.protocol.framed.AbstractFramedChannel$FrameCloseListener.handleEvent(AbstractFramedChannel.java:937)
>         at
> org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
> ------------------------------------------
>
> part is repeated a lot of times before a stack overflow is reached.
>
> I'm currently not able to reproduce the error on demand, most of the time it
> works just fine. I'm still investigating.
>
> I'd like to know if someone has already seen this? Any potential causes you
> may think of?
>
> Thanks,
>
> Julien
>
>
>
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