sqoop报错以及解决:Access denied for user 'root'@'172.16.21.22' (using password: YES)

在使用sqoop进行导入导出的时候出现了错误：

 

Warning: /apps/sqoop-1.4.6-cdh5.13.2/../hcatalog does not exist! HCatalog jobs will fail.
Please set $HCAT_HOME to the root of your HCatalog installation.
Warning: /apps/sqoop-1.4.6-cdh5.13.2/../accumulo does not exist! Accumulo imports will fail.
Please set $ACCUMULO_HOME to the root of your Accumulo installation.
19/05/09 14:16:48 INFO sqoop.Sqoop: Running Sqoop version: 1.4.6-cdh5.13.2
19/05/09 14:16:48 WARN tool.BaseSqoopTool: Setting your password on the command-line is insecure. Consider using -P instead.
19/05/09 14:16:48 INFO manager.MySQLManager: Preparing to use a MySQL streaming resultset.
19/05/09 14:16:48 ERROR manager.CatalogQueryManager: Failed to list databases
java.sql.SQLException: Access denied for user 'root'@'mini4' (using password: YES)
        at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1094)
        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4208)
        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4140)
        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:925)
        at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1747)
        at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1287)
        at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2494)
        at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2527)
        at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2309)
        at com.mysql.jdbc.ConnectionImpl.(ConnectionImpl.java:834)
        at com.mysql.jdbc.JDBC4Connection.(JDBC4Connection.java:46)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
        at com.mysql.jdbc.Util.handleNewInstance(Util.java:408)
        at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:419)
        at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:344)
        at java.sql.DriverManager.getConnection(DriverManager.java:664)
        at java.sql.DriverManager.getConnection(DriverManager.java:247)
        at org.apache.sqoop.manager.SqlManager.makeConnection(SqlManager.java:904)
        at org.apache.sqoop.manager.GenericJdbcManager.getConnection(GenericJdbcManager.java:52)
        at org.apache.sqoop.manager.CatalogQueryManager.listDatabases(CatalogQueryManager.java:57)
        at org.apache.sqoop.tool.ListDatabasesTool.run(ListDatabasesTool.java:49)
        at org.apache.sqoop.Sqoop.run(Sqoop.java:147)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
        at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:183)
        at org.apache.sqoop.Sqoop.runTool(Sqoop.java:234)
        at org.apache.sqoop.Sqoop.runTool(Sqoop.java:243)
        at org.apache.sqoop.Sqoop.main(Sqoop.java:252)
19/05/09 14:16:48 ERROR sqoop.Sqoop: Got exception running Sqoop: java.lang.RuntimeException: java.sql.SQLException: Access denied for user 'root'@'mini4' (ing password: YES)
java.lang.RuntimeException: java.sql.SQLException: Access denied for user 'root'@'mini4' (using password: YES)
        at org.apache.sqoop.manager.CatalogQueryManager.listDatabases(CatalogQueryManager.java:73)
        at org.apache.sqoop.tool.ListDatabasesTool.run(ListDatabasesTool.java:49)
        at org.apache.sqoop.Sqoop.run(Sqoop.java:147)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
        at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:183)
        at org.apache.sqoop.Sqoop.runTool(Sqoop.java:234)
        at org.apache.sqoop.Sqoop.runTool(Sqoop.java:243)
        at org.apache.sqoop.Sqoop.main(Sqoop.java:252)
Caused by: java.sql.SQLException: Access denied for user 'root'@'mini4' (using password: YES)
        at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1094)
        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4208)
        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4140)
        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:925)
        at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1747)
        at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1287)
        at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2494)
        at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2527)
        at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2309)
        at com.mysql.jdbc.ConnectionImpl.(ConnectionImpl.java:834)
        at com.mysql.jdbc.JDBC4Connection.(JDBC4Connection.java:46)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
        at com.mysql.jdbc.Util.handleNewInstance(Util.java:408)
        at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:419)
        at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:344)
        at java.sql.DriverManager.getConnection(DriverManager.java:664)
        at java.sql.DriverManager.getConnection(DriverManager.java:247)
        at org.apache.sqoop.manager.SqlManager.makeConnection(SqlManager.java:904)
        at org.apache.sqoop.manager.GenericJdbcManager.getConnection(GenericJdbcManager.java:52)
        at org.apache.sqoop.manager.CatalogQueryManager.listDatabases(CatalogQueryManager.java:57)
        ... 7 more

使用的语句是：

 sqoop list-databases --connect jdbc:mysql://mini4:3306 
--username root --password 123456;

我查了很多资料发现有以下两种方式是最可能的原因：

1-mysql驱动有问题

   把mysql的驱动包上传到sqoop的lib目录下，然后重新测试，就可以了。

 

2-root用户权限问题.

    登录语句用导出数据的mysql数据库,运行授权语句.()（我的就是出现了这个问题，这个需要在mysql中运行）。

 

grant all privileges on *.* to root@'%' identified by 'your password';
 grant all privileges on *.* to root@'your IP' identified by 'your password';
 flush privileges;

以上两种情况就能解决上述问题。