users@grizzly.java.net

"Broken Pipe" and "client is busy or timeout" errors

From: wild <itchy75_at_hotmail.fr>
Date: Mon, 28 Mar 2011 10:54:01 -0700 (PDT)

Hello,

I am facing two kind of excpetion actually with grizlly comet support. When
the handler try to write in the response, I sometimes have "Broken Pipe" or
"client is busy or timeout".

I am using a concurrent comet handler because I use comet in a streaming
mode. I have just modified the DefaultConcurrentCometHandler in order to
give a limite a message send by one thread. The comet handler keep a
reference on the httpresponse from the comet servlet when the user register.

I am using grizzly 1.0.39 in glassfish v2.

I have read some pieces of code and actually I see that the second exception
is due to a timeout on a selector.select() that took too much time. Just for
my understanding, did a call to the select method really send the data to
the remote client ?

So, in order to try to fix my issues I have to know if they are due to
grizzly internal logic (or my logic around grizzly) or due to netwrok
settings that are not properly set.

Does anyone can help me ?

Thanks.

William.


Stack Trace :

ClientAbortException: java.io.IOException: Broken pipe
        at
org.apache.coyote.tomcat5.OutputBuffer.doFlush(OutputBuffer.java:386)
        at
org.apache.coyote.tomcat5.OutputBuffer.flush(OutputBuffer.java:352)
        at
org.apache.coyote.tomcat5.CoyoteOutputStream.flush(CoyoteOutputStream.java:176)
        at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:278)
        at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:122)
        at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:212)
        at
com.big.comet.GrizzlyCometHandler.doWrite0(GrizzlyCometHandler.java:111)
        at
com.big.comet.GrizzlyCometHandler.doWrite(GrizzlyCometHandler.java:90)
        at
com.big.comet.GrizzlyCometHandler.writeEvent(GrizzlyCometHandler.java:99)
        at
com.big.comet.GrizzlyCometHandler.onEvent(GrizzlyCometHandler.java:129)
        at
com.big.comet.concurrent.GrizzlyConcurrentCometHandler.onEvent(GrizzlyConcurrentCometHandler.java:188)
        at
com.big.comet.concurrent.ConcurrentNotificationHandler.notify0(ConcurrentNotificationHandler.java:35)
        at
com.sun.enterprise.web.connector.grizzly.comet.DefaultNotificationHandler.notify(DefaultNotificationHandler.java:149)
        at
com.sun.enterprise.web.connector.grizzly.comet.CometContext.notify(CometContext.java:553)
        at
com.big.comet.GrizzlyMessageDispatcher$1.sendMessageToClient(GrizzlyMessageDispatcher.java:817)
        at
com.big.comet.GrizzlyMessageDispatcher$1.run(GrizzlyMessageDispatcher.java:806)
        at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:619)
Caused by: java.io.IOException: Broken pipe
        at sun.nio.ch.FileDispatcher.write0(Native Method)
        at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:29)
        at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:100)
        at sun.nio.ch.IOUtil.write(IOUtil.java:71)
        at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:334)
        at
com.sun.enterprise.web.connector.grizzly.OutputWriter.flushChannel(OutputWriter.java:92)
        at
com.sun.enterprise.web.connector.grizzly.OutputWriter.flushChannel(OutputWriter.java:65)
        at
com.sun.enterprise.web.connector.grizzly.SocketChannelOutputBuffer.flushChannel(SocketChannelOutputBuffer.java:170)
        at
com.sun.enterprise.web.connector.grizzly.async.AsynchronousOutputBuffer.flushChannel(AsynchronousOutputBuffer.java:81)
        at
com.sun.enterprise.web.connector.grizzly.SocketChannelOutputBuffer.flushBuffer(SocketChannelOutputBuffer.java:203)
        at
com.sun.enterprise.web.connector.grizzly.async.AsynchronousOutputBuffer.flushBuffer(AsynchronousOutputBuffer.java:113)


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