SQLException。导出到mysql时PIG出现JDBC错误

有人能帮我解决这个问题吗？我正试图将pig结果导出到mysql，但我面临着用户拒绝访问的问题。用户名和密码绝对正确

这是我的猪脚本：

REGISTER 'hdfs:///home/mysql-connector-java-3.1.14-bin.jar';
REGISTER 'hdfs:///home/piggybank-0.12.0.jar';

test = LOAD '/home/data.csv' USING PigStorage(',') AS (nom1:chararray, nom2:chararray, nom3:float, nom4:chararray);

processedtest = FOREACH test GENERATE nom1, nom2, nom3, nom4;

STORE processedtest INTO 'table' USING org.apache.pig.piggybank.storage.DBStorage('com.mysql.jdbc.Driver', 'jdbc:mysql://localhost/test', 'root',  'root', 'INSERT INTO table (nom1, nom2, nom3, nom4) VALUES (?, ?, ?, ?)');

这是日志文件中的错误：

    Pig Stack Trace
---------------
ERROR 2997: Encountered IOException. JDBC Error

java.io.IOException: JDBC Error
    at org.apache.pig.piggybank.storage.DBStorage.prepareToWrite(DBStorage.java:298)
    at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigOutputFormat$PigRecordWriter.<init>(PigOutputFormat.java:125)
    at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigOutputFormat.getRecordWriter(PigOutputFormat.java:86)
    at org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:597)
    at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:444)
    at org.apache.hadoop.mapred.Child$4.run(Child.java:268)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:396)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1408)
    at org.apache.hadoop.mapred.Child.main(Child.java:262)
Caused by: java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2975)

---

我还是一个新手，所以请向我推荐任何其他在导出到mysql时有益且更有效的方法

消息中用户“root”@“localhost”（使用密码：YES）的访问被拒绝，该消息表示您使用的密码不正确

Connection id:          6
Current database:
Current user:           root@localhost
SSL:                    Not in use
Using delimiter:        ;
Server version:         5.5.37 MySQL Community Server (GPL)
Protocol version:       10
Connection:             localhost via TCP/IP
Server characterset:    latin1
Db     characterset:    latin1
Client characterset:    latin1
Conn.  characterset:    latin1
TCP port:               3306
Uptime:                 5 hours 46 min 49 sec