HP OpenVMS Systems

Resolving IP Application Instability?

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The Question is:

 
We have occasionally experienced a "hang" when issuing a tcpip "connect" via
 sys$qiow(tcpipChan, IO$_ACCESS, &iosb, .....)
 
This has happens when the remote host has "a problem" (it is a vendor supplied
 windoze XP system and sometimes the vendor's application goes wild or
 something).  But what ever the case, shouldn't the qiow return with an error
 at some point instead of hang
ing?  Are they any patches for this behavior? Or must I use a qio version and
 cancel the i/o after waiting for a specified time?
Thanks for any advice,
John

The Answer is :

 
  Please contact the support center, as details of the TCP/IP version
  and ECO (V5.4 with ECO being current, as of this writing), as well
  as details of the hang (preferably leading to a way to reproduce
  the configuration), will be required.  This can discussion can and
  likely should also involve the third-party vendor, obviously.
 
  Depending on what is actually occuring on the remote end of the
  connection, the connection might well appear to hang.
 
  You can certainly issue cancellation requests, but these can
  variously be as problematic as the hang itself -- applications
  and networks in indeterminant states tend not to cancel
  particularly cleanly.  An asynchronous call and a timer, or
  a synchronous call and an AST on a timer can potentially be
  used to cancel the operation.
 

  

     

     
answer written or last revised on ( 13-APR-2004 )
     
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