sqoop从mysql向hive中导数据，报数据库访问被拒绝

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sqoop从mysql向hive中导数据，报数据库访问被拒绝。但诡异的是，sqoop的报错是提示连接本机的mysql被拒绝了，并不是提示连接目标数据所在的mysql被拒绝。我的还连了zookeeper，还会提示连接所有的zookeeper主机的mysql被拒绝。日志如最下方。

其实这些问题都是一个原因，就是目标数据所在的mysql限制了zookeeper的主机去访问它。只需要在该mysql上授权即可。

执行

grant all privileges on *.* to hadoop@‘%‘ identified by ‘password‘;
flush privileges;

出错日志：

15/09/17 10:51:30 ERROR manager.SqlManager: Error executing statement: java.sql.SQLException: Access denied for user ‘hadoop‘@‘192.168.1.110‘ (using password: YES)
java.sql.SQLException: Access denied for user ‘hadoop‘@‘192.168.1.110‘ (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.<init>(ConnectionImpl.java:834)
        at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
        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:571)
        at java.sql.DriverManager.getConnection(DriverManager.java:215)
        at org.apache.sqoop.manager.SqlManager.makeConnection(SqlManager.java:885)
        at org.apache.sqoop.manager.GenericJdbcManager.getConnection(GenericJdbcManager.java:52)
        at org.apache.sqoop.manager.SqlManager.execute(SqlManager.java:744)
        at org.apache.sqoop.manager.SqlManager.execute(SqlManager.java:767)
        at org.apache.sqoop.manager.SqlManager.getColumnInfoForRawQuery(SqlManager.java:270)
        at org.apache.sqoop.manager.SqlManager.getColumnTypesForRawQuery(SqlManager.java:241)
        at org.apache.sqoop.manager.SqlManager.getColumnTypesForQuery(SqlManager.java:234)
        at org.apache.sqoop.manager.ConnManager.getColumnTypes(ConnManager.java:304)
        at org.apache.sqoop.orm.ClassWriter.getColumnTypes(ClassWriter.java:1833)
        at org.apache.sqoop.orm.ClassWriter.generate(ClassWriter.java:1645)
        at org.apache.sqoop.tool.CodeGenTool.generateORM(CodeGenTool.java:107)
        at org.apache.sqoop.tool.ImportTool.importTable(ImportTool.java:478)
        at org.apache.sqoop.tool.ImportTool.run(ImportTool.java:605)
        at org.apache.sqoop.Sqoop.run(Sqoop.java:143)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
        at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:179)
        at org.apache.sqoop.Sqoop.runTool(Sqoop.java:218)
        at org.apache.sqoop.Sqoop.runTool(Sqoop.java:227)
        at org.apache.sqoop.Sqoop.main(Sqoop.java:236)
15/09/17 10:51:30 ERROR tool.ImportTool: Encountered IOException running import job: java.io.IOException: No columns to generate for ClassWriter
        at org.apache.sqoop.orm.ClassWriter.generate(ClassWriter.java:1651)
        at org.apache.sqoop.tool.CodeGenTool.generateORM(CodeGenTool.java:107)
        at org.apache.sqoop.tool.ImportTool.importTable(ImportTool.java:478)
        at org.apache.sqoop.tool.ImportTool.run(ImportTool.java:605)
        at org.apache.sqoop.Sqoop.run(Sqoop.java:143)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
        at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:179)
        at org.apache.sqoop.Sqoop.runTool(Sqoop.java:218)
        at org.apache.sqoop.Sqoop.runTool(Sqoop.java:227)
        at org.apache.sqoop.Sqoop.main(Sqoop.java:236)

sqoop从mysql向hive中导数据，报数据库访问被拒绝

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原文地址：http://my.oschina.net/houxm/blog/507455