lots of EConnReset errors in Node.js & node-soap - only from overseas though

[ming]

Hi,
i ran into a weird connection reset problem when my Node.js program talks to a SOAP/WSDL server in US from UK.   Note that my Node.js program runs just fine in US for almost one year.   However, if i run the same program in UK (talking to the same SOAP/WSDL server in US), about 50% of the time i saw ECONNRESET errors. 

According to my web surfing, the ECONNRESET errors were likely caused by file descriptor(s) closed by the kernel.  i think that's likely the case here since tcpdump+WireShark did not reveal any connection reset originating from the SOAP server.

The versions i use are:
* Node.js    0.10.24
* node-soap  0.4.0

Any suggestions how i can track down the culprit and rectify the problem?

Thanks for reading.