FULL PRODUCT VERSION :
java version "1.8.0_66"
Java(TM) SE Runtime Environment (build 1.8.0_66-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.66-b17, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
OS X 10.11.1

A DESCRIPTION OF THE PROBLEM :
Refering to JDK-8072464, which is closed due to "cannot reproduce".
I wonder why your Devs can`t reproduce the problem, but I guess it because of his proxy settings.

Taking the following test and grep for 
Extension server_name, server_name: [type=host_name (0), value=www.google.com]

First method leads to intended output, second method setting hostnameverifier doesn't.


import javax.net.ssl.HttpsURLConnection;
import java.net.URL;

public class SslTest {
	static {
		System.setProperty("javax.net.debug", "ssl,handshake");
	}

	@Test
	public void testHandshake() throws Exception {
		URL url = new URL("https://www.google.com");
		HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
		conn.getInputStream();
	}

	@Test
	public void testHandshakeHostnameVerifier() throws Exception {
		URL url = new URL("https://www.google.com");
		HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
		conn.setHostnameVerifier((s, sslSession) -> true);
		conn.getInputStream();
	}

}

Sorry for the duplicate, but it is not possible to reopen or comment a bug.

REGRESSION.  Last worked in version 8u66

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
import javax.net.ssl.HttpsURLConnection;
import java.net.URL;

public class SslTest {
	static {
		System.setProperty("javax.net.debug", "ssl,handshake");
	}

	@Test
	public void testHandshake() throws Exception {
		URL url = new URL("https://www.google.com");
		HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
		conn.getInputStream();
	}

	@Test
	public void testHandshakeHostnameVerifier() throws Exception {
		URL url = new URL("https://www.google.com");
		HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
		conn.setHostnameVerifier((s, sslSession) -> true);
		conn.getInputStream();
	}

}

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Use of SNI Extension in both test methods

Debug Information contains:

Extension server_name, server_name: [type=host_name (0), value=www.google.com]
ACTUAL -
SNI is used without custom host name verifier only.


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.net.ssl.HttpsURLConnection;
import java.net.URL;

public class SslTest {
	static {
		System.setProperty("javax.net.debug", "ssl,handshake");
	}

	@Test
	public void testHandshake() throws Exception {
		URL url = new URL("https://www.google.com");
		HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
		conn.getInputStream();
	}

	@Test
	public void testHandshakeHostnameVerifier() throws Exception {
		URL url = new URL("https://www.google.com");
		HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
		conn.setHostnameVerifier((s, sslSession) -> true);
		conn.getInputStream();
	}

}
---------- END SOURCE ----------