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Solaris

TCP Problem

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Operating Systems Solaris TCP Problem
# 1  
Old 04-17-2008
TCP Problem
I am running a Java Client on Solaris 9 which communicates with the Server using TCP/IP.

The client transmits a FIN packet to server. The server sends a ACK, FIN enters LAST_ACK state and then waits for ACK from client. The client did not respond back leaving the server in LAST_ACK itself. Also the Client connects with the server on a fixed port, so the new connection attempt also results in a failure.

The point is, the client is written not to close the connection. I am not sure how and why the client sends a FIN. One more thing is the client is killed every day but this might not lead to this problem as ideally on killing, only a RST shud be sent to the server. The client is written on Java which will properly close the connection on exit.

My question is, Is der are any TCP/IP issue with the solaris stack which lead me to this problem? The server side is clean(even LAST_ACK sockets are teared down after 1000 seconds after which connection attempt is successful).
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LEARN ABOUT REDHAT

tcp-env

tcp-env(1)                                                    General Commands Manual                                                   tcp-env(1)

NAME

       tcp-env - set up TCP-related environment variables

SYNOPSIS

       tcp-env [ -rR ] [ -ttimeout ] program [ arg ...  ]

DESCRIPTION

       The  input  for  tcp-env  must be a TCP connection.  tcp-env finds out information about that connection, puts the information into several
       environment variables as described in tcp-environ(5), and runs program with the given arguments.

       Usually tcp-env is run from inetd.  It might instead be run from another server that already sets up the right  environment  variables;  if
       PROTO  is  set  to  TCP  when  tcp-env  is invoked, tcp-env assumes that all the other variables are set up properly, and it does not check
       whether the input is a TCP connection.

OPTIONS

       -r     (Default.)  Attempt to obtain TCPREMOTEINFO from the remote host.

       -R     Do not attempt to obtain TCPREMOTEINFO from the remote host.

       -ttimeout
              Give up on the TCPREMOTEINFO connection attempt after timeout seconds.  Default: 30.

SEE ALSO

       tcp-environ(5), inetd(8)

                                                                                                                                        tcp-env(1)