HP OpenVMS Systems

IP socket FIN_WAIT_2 state? (keepalive)

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The Question is:

 
  DIGITAL TCP/IP Services for OpenVMS Alpha Version V5.0A
  on a AlphaServer DS20 500 MHz running OpenVMS V7.2-1
 
I am running the above software and operating system.
 
I am having a problem with a software package using TCPIP establishing a
listening socket.
 
I get the following when I do a NETSTAT -a
Active Internet connections (including servers)
Proto Recv-Q Send-Q  Local Address             Foreign Address
(state)
tcp    0      0  RAF631.4851               ROAPC122.12001
FIN_WAIT_2
tcp        0      0  RAF631.12241              ROAPC24.2403
FIN_WAIT_2
 
What is a FIN_WAIT_2 state?  I cannot find any reference to this.
The socket I am trying to start as a listening socket is 12241.
 
Any idea as to to what may be causing the FIN_WAIT_2 state?  I get an exit
value of 148 from the C software running the application.  From what I can
tell that means there is a duplicate socket?
 
Please let me know if you have any knowledge of this problem.
 
Thank you.
Sincerely,
 
Will Perkinson
What is a State of FIN_WAIT_2
 

The Answer is :

 
  FIN_WAIT_2 is a TCP connection state.
 
  FIN_WAIT_2 usually indicates that the socket has not been cleaned
  up, potentially due to a connection failure or remote system crash.
 
  The usual solution is to enable keepalive, and detect and clean up
  the connection.  (eg: setsockopt call with SO_KEEPALIVE, or sys$qio
  IO$_SETMODE call.)
 

  

     

     
answer written or last revised on ( 17-JAN-2000 )
     
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