RE: [MINA] Error on StreamIOHandler

Thu, 24 Nov 2005 07:32:52 -0800

This is just a guess off the top of my head (so apologies if its wildly inaccurate), but I wonder whether it has anything to do with processor threads being shut down if they dont do any work?
When an attempt is made to read from a PipedInputStream, a check is made every second to see whether the last thread to write to the associated PipedOutputStream is still alive.
 
From PipedInputStream:
 
int trials = 2;
 while (in < 0) {
     if (closedByWriter) {
  /* closed by writer, return EOF */
  return -1;
     }
     if ((writeSide != null) && (!writeSide.isAlive()) && (--trials < 0)) {
  throw new IOException("Pipe broken");
     }
            /* might be a writer waiting */
     notifyAll();
     try {
         wait(1000);
     } catch (InterruptedException ex) {
  throw new java.io.InterruptedIOException();
     }
  }
 
So, if mina shuts down the thread which caused the last write after inactivity (which I think it might do), this could be the cause.

Dave
 
From: Jose Alberto Fernandez [mailto:[EMAIL PROTECTED]
Sent: 24 November 2005 15:11
To: Apache Directory Developers List
Subject: [MINA] Error on StreamIOHandler

Hi, we are getting the following stack trace when one is not constantly typing on a telnet session connected using StreamIOHandler:

 

java.io.IOException: Pipe broken

        at java.io.PipedInputStream.read(PipedInputStream.java:255)

        at org.apache.mina.io.handler.StreamIoHandler$PipedInputStream.read(StreamIoHandler.java:223)

        at java.io.PipedInputStream.read(PipedInputStream.java:305)

        at org.apache.mina.io.handler.StreamIoHandler$PipedInputStream.read(StreamIoHandler.java:229)

        at sun.nio.cs.StreamDecoder$CharsetSD.readBytes(StreamDecoder.java:411)

        at sun.nio.cs.StreamDecoder$CharsetSD.implRead(StreamDecoder.java:453)

        at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:183)

        at java.io.InputStreamReader.read(InputStreamReader.java:167)

        at java.io.BufferedReader.fill(BufferedReader.java:136)

        at java.io.BufferedReader.readLine(BufferedReader.java:299)

        at java.io.BufferedReader.readLine(BufferedReader.java:362)

        at com.cellectivity.poker.clienthandler.telnet.PokerTelnetHandler$Worker.run(PokerTelnetHandler.java:340)

        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)

        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)

        at java.lang.Thread.run(Thread.java:595)

 

This is MINA 0.8.1. We have only one connection and this occurs every time we do not use the telnet session for a little while,

less than a minute. Has anyone seen this error before? Any way to solve it?

 

Jose Alberto

 



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