Create external table with s3 location error

[Garry Chen]

hi All,
                I am try to create a external table using s3 as location but 
failed.  I add my access key and security key in hive-site.xml and reboot the 
server.  Any suggestion?

hive>  create external table kv (key int, values string)  location 
's3://cu-iclick/test';
FAILED: Execution Error, return code 1 from 
org.apache.hadoop.hive.ql.exec.DDLTask. 
MetaException(message:java.lang.NullPointerException)

Garry