Let me start this off by stating that the information I am seeking IS NOT due
to an *issue* with LC. Hopefully, I can make it clear why I am asking for
assistance from this group in regard to the situation I am trying to deal with
and why I need the LC expertise of this group as a resource.
In a portion of a large application, which has been distributed to a large
number (5,000+) of remote/external sites, I have a call to a TCP socket:
on OpenCard
...
put ftp_server & ":" & tcp_port into temp1
open socket to temp1 with message "NewConnection"
wait for messages
end OpenCard
Then there are a variety of "call-backs" based on when happens after I open the
socket. One of these call-backs is "socketError":
on socketError theID, theError
close socket theID
do_log " " & sftp_account && "file: " & "There is a problem with the TCP
connection: " & theError, "connect", 3
...
end socketError
This works PERFECTLY 99.999% of the time. However, occasionally I get a "mass"
of errors (50 or 60) within a 1 hour period of time from a large variety of
different external sites (I get all of the remote site's logs) ... i.e. many
different sites connecting in from many different locations around the province
of Ontario ... a very large place!
The error returned is: "can't resolve hostname"... returned in the "theError"
parameter of the socketError function.
Here's where I need help. I need to find out, with as great a level of detail
as possible, EXACTLY what (from LC's "point-of-view") triggers this error, what
part(s) of the LC engine are involved with generating this error and if there
is more than the obvious cause of the remote site's DNS server (via their ISP
or internal server(s)) not being able to "see" the hostname that could produce
this error.
Although this "error" appears to be "common" from a variety of sources (none of
which are written in LC, as far as I can tell)... I cannot find any "standard"
by which a DNS generates this specific message. NSLOOKUP would be the closest
candidate but even it doesn't produce this specific error of being "unable to
resolve the hostname"... so that leaves LC with the responsibility of the
content of the error.
I REALLY want to emphasize that, as far as I am concerned, this is not a
problem with LC, in any manner... but I need to find out where and why LC
generates this message.
I am not sure what or where to search for this error or what generates it from
with the LC components but if someone could help me "find" a starting point, I
should be able to reverse-engineer the logic.
The overall situation is fairly complex but I'd be very open to providing more
details if anyone feels it is warranted.
Whatever help could be provided will be very, very appreciated!
Douglas Ruisaard
Trilogy Software
(250) 573-3935
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