HP OpenVMS Systems

Spawned FTP Subprocess Stalls?

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The Question is:

 
I have a Fortran program that is woken up about every 100 seconds.  When it is
 woken up it does a lib$spawn of a command procedure that FTPs a file back to
 the Alpha from a Penitum PC. Some times the spawned out process never
 finishes.  What can cause the
 lib$spawn not to come back from the FTP?

The Answer is :

 
  The potential problem set of a stalled network FTP operation across
  a mixed network configuration approaches infinity, unfortunately.
  (Open-ended questions can be exceedingly difficult to answer.)
 
  You will want to use the output option and log the activity of
  the spawned subprocess, of course.  This might provide clues as
  to the delay.
 
  You might try using COPY/FTP, as this likely eliminates the need
  to use the command procedure, and can also make troubleshooting
  and error-handling somewhat easier to manage.
 
  You could also choose to configure SMB services or NFS services
  on the OpenVMS host, and more directly store the file onto the
  OpenVMS host from the remote client.
 
  You will want to acquire the mandatory ECO kits for OpenVMS and
  for the particular IP stack in use -- if this is TCP/IP Services,
  the current product release is V5.4, and there are ECOs available
  for both OpenVMS and for TCP/IP Services.  You will also want to
  investigate any ECOs for the FTP server running on the target
  platform, as well as any ECOs for the target platform itself.
 

  

     

     
answer written or last revised on ( 26-MAY-2004 )
     
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