kettle连接mysql时出现问题

错误信息如下：

 错误连接数据库 [test] : org.pentaho.di.core.exception.KettleDatabaseException:

 Error occurred while trying to connect to the database

 Error connecting to database: (using class org.gjt.mm.mysql.Driver)

 null,  message from server: "Host '127.0.0.1' is not allowed to connect to this MySQL server"

 org.pentaho.di.core.exception.KettleDatabaseException:

 Error occurred while trying to connect to the database

 Error connecting to database: (using class org.gjt.mm.mysql.Driver)

 null,  message from server: "Host '127.0.0.1' is not allowed to connect to this MySQL server"

     at org.pentaho.di.core.database.Database.normalConnect(Database.java:)

     at org.pentaho.di.core.database.Database.connect(Database.java:)

     at org.pentaho.di.core.database.Database.connect(Database.java:)

     at org.pentaho.di.core.database.Database.connect(Database.java:)

     at org.pentaho.di.core.database.DatabaseFactory.getConnectionTestReport(DatabaseFactory.java:)

     at org.pentaho.di.core.database.DatabaseMeta.testConnection(DatabaseMeta.java:)

     at org.pentaho.ui.database.event.DataHandler.testDatabaseConnection(DataHandler.java:)

     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:)

     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:)

     at java.lang.reflect.Method.invoke(Method.java:)

     at org.pentaho.ui.xul.impl.AbstractXulDomContainer.invoke(AbstractXulDomContainer.java:)

     at org.pentaho.ui.xul.impl.AbstractXulComponent.invoke(AbstractXulComponent.java:)

     at org.pentaho.ui.xul.impl.AbstractXulComponent.invoke(AbstractXulComponent.java:)

     at org.pentaho.ui.xul.swt.tags.SwtButton.access$(SwtButton.java:)

     at org.pentaho.ui.xul.swt.tags.SwtButton$.widgetSelected(SwtButton.java:)

     at org.eclipse.swt.widgets.TypedListener.handleEvent(Unknown Source)

     at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)

     at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)

     at org.eclipse.swt.widgets.Display.runDeferredEvents(Unknown Source)

     at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)

     at org.eclipse.jface.window.Window.runEventLoop(Window.java:)

     at org.eclipse.jface.window.Window.open(Window.java:)

     at org.pentaho.ui.xul.swt.tags.SwtDialog.show(SwtDialog.java:)

     at org.pentaho.ui.xul.swt.tags.SwtDialog.show(SwtDialog.java:)

     at org.pentaho.di.ui.core.database.dialog.XulDatabaseDialog.open(XulDatabaseDialog.java:)

     at org.pentaho.di.ui.core.database.dialog.DatabaseDialog.open(DatabaseDialog.java:)

     at org.pentaho.di.ui.spoon.delegates.SpoonDBDelegate.newConnection(SpoonDBDelegate.java:)

     at org.pentaho.di.ui.spoon.delegates.SpoonDBDelegate.newConnection(SpoonDBDelegate.java:)

     at org.pentaho.di.ui.spoon.Spoon.doubleClickedInTree(Spoon.java:)

     at org.pentaho.di.ui.spoon.Spoon.doubleClickedInTree(Spoon.java:)

     at org.pentaho.di.ui.spoon.Spoon.access$(Spoon.java:)

     at org.pentaho.di.ui.spoon.Spoon$.widgetDefaultSelected(Spoon.java:)

     at org.eclipse.swt.widgets.TypedListener.handleEvent(Unknown Source)

     at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)

     at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)

     at org.eclipse.swt.widgets.Display.runDeferredEvents(Unknown Source)

     at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)

     at org.pentaho.di.ui.spoon.Spoon.readAndDispatch(Spoon.java:)

     at org.pentaho.di.ui.spoon.Spoon.waitForDispose(Spoon.java:)

     at org.pentaho.di.ui.spoon.Spoon.start(Spoon.java:)

     at org.pentaho.di.ui.spoon.Spoon.main(Spoon.java:)

     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:)

     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:)

     at java.lang.reflect.Method.invoke(Method.java:)

     at org.pentaho.commons.launcher.Launcher.main(Launcher.java:)

 Caused by: org.pentaho.di.core.exception.KettleDatabaseException:

 Error connecting to database: (using class org.gjt.mm.mysql.Driver)

 null,  message from server: "Host '127.0.0.1' is not allowed to connect to this MySQL server"

     at org.pentaho.di.core.database.Database.connectUsingClass(Database.java:)

     at org.pentaho.di.core.database.Database.normalConnect(Database.java:)

     ...  more

 Caused by: java.sql.SQLException: null,  message from server: "Host '127.0.0.1' is not allowed to connect to this MySQL server"

     at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:)

     at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:)

     at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:)

     at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:)

     at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:)

     at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:)

     at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:)

     at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:)

     at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:)

     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

     at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:)

     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:)

     at java.lang.reflect.Constructor.newInstance(Constructor.java:)

     at com.mysql.jdbc.Util.handleNewInstance(Util.java:)

     at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:)

     at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:)

     at java.sql.DriverManager.getConnection(DriverManager.java:)

     at java.sql.DriverManager.getConnection(DriverManager.java:)

     at org.pentaho.di.core.database.Database.connectUsingClass(Database.java:)

     ...  more

主机名       : localhost
端口           : 3306
数据库名:mysql

在网上搜了好多都说mysql-connector-java-5.1.26-bin没有在/data-integration/lib或者/data-integration/libswt/win64/下

但是上图可以看出我的jar包已在/data-integration/lib下

最后，解决方法是：

1. root使用密码123456（密码自己设置强度高点）从任何主机连接到mysql服务器的话。

 mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '' WITH GRANT OPTION;

 Query OK, 0 rows affected (0.00 sec)

 mysql> FLUSH   PRIVILEGES;

 Query OK, 0 rows affected (0.00 sec)

2. 允许用户root从的主机连接到mysql服务器，并使用123456作为密码

 mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '' WITH GRANT OPTION;

 Query OK, 0 rows affected (0.00 sec)

 mysql> FLUSH   PRIVILEGES;

 Query OK, 0 rows affected (0.00 sec)

3. 允许用户root从ip为127.0.0.2的主机连接到mysql服务器的dk数据库，并使用123456作为密码

 mysql> GRANT ALL PRIVILEGES ON dk.* TO 'root'@'127.0.0.2' IDENTIFIED BY '' WITH GRANT OPTION;

 Query OK, 0 rows affected (0.00 sec)

 mysql> FLUSH   PRIVILEGES;

 Query OK, 0 rows affected (0.00 sec)

授权完成后，再一次连接成功。

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