Intermittant WebService Timeout

[Steve Schaenzer]

Hello,

I have a windows client that makes a WebService call on regular intervals
using a timer. This call is very simple and always takes a very short time
to reply. However about every one in ten tries the Call receives a mysterous
timeout error. This is very annoying for my users because since it is a
syncronus call it locks up the interface for the duration of the timeout
period.

I was doing some investigation by watching the packets and it seems that on
the occasions that the timeout occures, that the windows client was in the
middle of a connection check. That is, it seems it was doing some chit chat
on the connection to keep the connection alive and in the middle of this my
application call was made, causing the application call to fail. On this
occation the server responded with an ACK rather than an OK at the end of
its transmision and the client did not recognize this as a proper response.

It appears that there is some kind of low level problem with making
WebService calls during a timer tick. My guess is that the timer tick fires
in the middle of a sequence of events that the proxy class expects to occur
in a certain order.

Anyone have an idea or a similar problem?

Thanks,

Steve.