SoapFault exception: Could not connect to host

Question

Sometimes fail to call the web service.

This problem happens all the time.

What could be the problem?

Error:
    SoapFault exception: [HTTP]          


        

Answer 1

It seems the error SoapFault exception: Could not connect to host can be caused be several different things. In my cased it wasn't caused by proxy, firewall or DNS (I actually had a SOAP connection from the same machine working using nusoap without any special setup).

Finally I found that it was caused by an invalid pem file which I referenced in the local_cert option in my SoapClient contructor.

Solution: When I removed the certificate chain from the pem file, so it only contained certificate and private key, the SOAP calls started going through.