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Socket connect timed out and connection refuse

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I have the following piece of code
InetAddress addr = InetAddress.getByName(server.getHost());
int port = Integer.parseInt(server.getPort());
SocketAddress sockaddr = new InetSocketAddress(addr, port);
socket = new Socket();
socket.connect(sockaddr, 5000);

When I run it as standalone java application(jar) trying to connect to the server(down). It throws IO Exception with message "connect timed out" . The exception is thrown after 5 secs.

When the application(jar) is loaded from jvm.dll(native code) trying to connect to the server(down). It throws IOException with message "Connection refused: connect"
The issue with this is exception is thrown immediately within a second.

The whole logic is based on the timeout parameter. Does anyone have idea what could be the reason of different behavior Or How to resolve this issue ?
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