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From "Peter Boevink" <peter.boev...@alfa-ariss.com>
Subject [net]TelnetClient.getInputStream.write() causes SocketTimeOutException immediately
Date Thu, 22 Sep 2005 12:09:13 GMT
Hi,
 
Making use of the commons.net.telnet.TelnetClient, we've set up a connection with a Telnet
Daemon.
It works fine to send a message to the Telnet Daemon by using an OutputStream and receive
a response by using a BufferedReader.
The SoTimeout was set to 15 seconds.
 
But if we haven't send/received anything for appr. 20 seconds the next first message is send
to the Outputstream, but the BufferedReader.read() immediately throws a SocketTimeOutException!
A retry 'read()' to the same instance of the BufferredReader succeeds (without setting up
a new connection).
 
Strange enough this does not happen if the Telnet Communication 'sleeps' for less than 10
seconds, but only if no communication has been there for longer than 20 seconds.
 
We receive the following stacktrace:
Stacktrace {
        java.net.SocketTimeoutException: Read timed out
                 at java.net.SocketInputStream.socketRead0(Native Method)
                 at java.net.SocketInputStream.read(SocketInputStream.java:129)
                 at java.io.BufferedInputStream.fill(BufferedInputStream.java:183)
                 at java.io.BufferedInputStream.read(BufferedInputStream.java:201)
                 at java.io.FilterInputStream.read(FilterInputStream.java:66)
                 at java.io.PushbackInputStream.read(PushbackInputStream.java:120)
                 at org.apache.commons.net.io.FromNetASCIIInputStream.__read(FromNetASCIIInputStream.java:75)
                 at org.apache.commons.net.io.FromNetASCIIInputStream.read(FromNetASCIIInputStream.java:170)
                 at java.io.BufferedInputStream.fill(BufferedInputStream.java:183)
                 at java.io.BufferedInputStream.read(BufferedInputStream.java:201)
                 at org.apache.commons.net.telnet.TelnetInputStream.__read(TelnetInputStream.java:114)
                 at org.apache.commons.net.telnet.TelnetInputStream.run(TelnetInputStream.java:535)
                 at java.lang.Thread.run(Thread.java:534)
}

Does anybody have a clue in which direction to look for a solution?
 
Thanks,
Peter
 

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