 <p>Guan, have you tried with an earlier version of the JDK (e.g., JDK-1.5?). I realize it's much older, but I'm curious if it's related to using the CLT on JDK 1.8. Just an idea.</p> <p>Additionally, it would help if we could see the turk.properties file (please don't share your access keys or secret key) to make sure the endpoints are well-formed. Thanks!</p>