Thrift in some cases can't parse string to date

CREATE TABLE empsalary (                                                                                                                
    depname string,                                                                                                                     
    empno integer,                                                                                                                      
    salary int,                                                                                                                         
    enroll_date date                                                                                                                    
) USING parquet;  
INSERT INTO empsalary VALUES ('develop', 10, 5200, '2007-08-01');