Getting this under Eclipse straight out of the gate.
Code:
System.setProperty(\"webdriver.chrome.driver\" , \"/path/to/selenium/chromedriver\");
Setting this back to 22.0 helped for me.
Version 22.0 didn't fix the problem for me, but 19.0 did.
compile group: 'com.google.guava', name: 'guava', version: '19.0'