I use a proxy
options.addArguments("--proxy-server=http://" + proxy);

WARNING: Failed to resolve host address
java.lang.NullPointerException
	at org.openqa.selenium.net.HostIdentifier.resolveHostAddress(HostIdentifier.java:92)
	at org.openqa.selenium.net.HostIdentifier.getHostAddress(HostIdentifier.java:123)
	at org.openqa.selenium.WebDriverException.getSystemInformation(WebDriverException.java:95)
	at org.openqa.selenium.WebDriverException.createMessage(WebDriverException.java:87)
	at org.openqa.selenium.WebDriverException.getMessage(WebDriverException.java:65)
	at java.lang.Throwable.getLocalizedMessage(Throwable.java:391)
	at java.lang.Throwable.toString(Throwable.java:480)
	at java.lang.String.valueOf(String.java:2994)
	at java.io.PrintStream.println(PrintStream.java:821)
	at java.lang.Throwable$WrappedPrintStream.println(Throwable.java:748)
	at java.lang.Throwable.printStackTrace(Throwable.java:655)
	at java.lang.Throwable.printStackTrace(Throwable.java:643)
	at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:1061)
	at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:1052)
	at java.lang.Thread.dispatchUncaughtException(Thread.java:1959)