Unknown host exception

[Pranav Raulkar]

This is a bit strange behaviour I came across. There are two systems, both behind proxy. On both systems the following works

InetAddress[] address = InetAddress.getAllByName("www.xyz.com");

for(InetAddress a : address){
	System.out.println(a);
}

But on one system it throws unknown host exception when following is used

InetAddress[] address = InetAddress.getAllByName("http:\\\\www.google.co.in");

what could be the problem, as the same works on other system perfectly. First I thought it nay be because of proxy, but it doesn't seem to be.

[Chinna Eranna]

Are you sure that "http:\\\\www.google.co.in" works in another machine ?

What you are giving above is url, not the address. Just give the address part of it and try. (i.e., www.google.co.in)

[Pranav Raulkar]

Yes I am sure

[Chinna Eranna]

According to JavaDoc For InetAddress,

the argument to getAllByName can be a machine name or textual representation of ip address.

Why are you passing the protocol part to it ?

[Pranav Raulkar]

Chinna, thanks for quick reply, I know that protocol shouldn't be a part of this. But it works on one system, which made me ponder!

[Ernest Friedman-Hill]

With the backslashes, that isn't even a valid URL: it's http://, not http:\\ .

[Pranav Raulkar]

I know. It's just shocking, but it works!! It gets all the IP's. It works with '\' on that machine but fails on mine, as expected