连接到数据库时出错：（使用类 org.gjt.mm.mysql.Driver）

Question

我正在尝试在 Pentaho 5.3.0.0-213 中建立与 localhost 上的 mysql 的连接。我正在使用运行 OS 10.10.2 的 Mac。我可以使用 Sequel Pro 连接到数据库，并阅读了本网站（以及其他！）上已经给出的所有答案，并将 mysql-connector-java-5.1.34-bin.jar 下载并复制到 data-integration/lib仍然得到同样的错误。

欢迎提出任何建议。

整个错误信息如下： 连接到数据库 [localhost_con] 时出错：org.pentaho.di.core.exception.KettleDatabaseException： 尝试连接数据库时出错

连接数据库时出错：（使用类 org.gjt.mm.mysql.Driver） 通讯链路故障

最后一个成功发送到服务器的数据包是 0 毫秒前。驱动没有收到服务器发来的任何数据包。

org.pentaho.di.core.exception.KettleDatabaseException： 尝试连接数据库时出错

连接数据库时出错：（使用类 org.gjt.mm.mysql.Driver） 通讯链路故障

最后一个成功发送到服务器的数据包是 0 毫秒前。驱动没有收到服务器发来的任何数据包。

    at org.pentaho.di.core.database.Database.normalConnect(Database.java:417)
    at org.pentaho.di.core.database.Database.connect(Database.java:357)
    at org.pentaho.di.core.database.Database.connect(Database.java:310)
    at org.pentaho.di.core.database.Database.connect(Database.java:300)
    at org.pentaho.di.core.database.DatabaseFactory.getConnectionTestReport(DatabaseFactory.java:80)
    at org.pentaho.di.core.database.DatabaseMeta.testConnection(DatabaseMeta.java:2685)
    at org.pentaho.ui.database.event.DataHandler.testDatabaseConnection(DataHandler.java:546)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.pentaho.ui.xul.impl.AbstractXulDomContainer.invoke(AbstractXulDomContainer.java:313)
    at org.pentaho.ui.xul.impl.AbstractXulComponent.invoke(AbstractXulComponent.java:157)
    at org.pentaho.ui.xul.impl.AbstractXulComponent.invoke(AbstractXulComponent.java:141)
    at org.pentaho.ui.xul.swt.tags.SwtButton.access$500(SwtButton.java:43)
    at org.pentaho.ui.xul.swt.tags.SwtButton$4.widgetSelected(SwtButton.java:138)
    at org.eclipse.swt.widgets.TypedListener.handleEvent(Unknown Source)
    at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Display.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.notifyListeners(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:820)
    at org.eclipse.jface.window.Window.open(Window.java:796)
    at org.pentaho.ui.xul.swt.tags.SwtDialog.show(SwtDialog.java:389)
    at org.pentaho.ui.xul.swt.tags.SwtDialog.show(SwtDialog.java:318)
    at org.pentaho.di.ui.core.database.dialog.XulDatabaseDialog.open(XulDatabaseDialog.java:116)
    at org.pentaho.di.ui.core.database.dialog.DatabaseDialog.open(DatabaseDialog.java:59)
    at org.pentaho.di.ui.spoon.delegates.SpoonDBDelegate.editConnection(SpoonDBDelegate.java:87)
    at org.pentaho.di.ui.spoon.Spoon.doubleClickedInTree(Spoon.java:3096)
    at org.pentaho.di.ui.spoon.Spoon.doubleClickedInTree(Spoon.java:3031)
    at org.pentaho.di.ui.spoon.Spoon.access$2400(Spoon.java:347)
    at org.pentaho.di.ui.spoon.Spoon$27.widgetDefaultSelected(Spoon.java:6121)
    at org.eclipse.swt.widgets.TypedListener.handleEvent(Unknown Source)
    at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Display.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.notifyListeners(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:1316)
    at org.pentaho.di.ui.spoon.Spoon.waitForDispose(Spoon.java:7979)
    at org.pentaho.di.ui.spoon.Spoon.start(Spoon.java:9310)
    at org.pentaho.di.ui.spoon.Spoon.main(Spoon.java:654)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.pentaho.commons.launcher.Launcher.main(Launcher.java:92)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at apple.launcher.LaunchRunner.run(LaunchRunner.java:116)
    at apple.launcher.LaunchRunner.callMain(LaunchRunner.java:51)
    at apple.launcher.JavaApplicationLauncher.launch(JavaApplicationLauncher.java:52)
Caused by: org.pentaho.di.core.exception.KettleDatabaseException: 
Error connecting to database: (using class org.gjt.mm.mysql.Driver)
Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

    at org.pentaho.di.core.database.Database.connectUsingClass(Database.java:561)
    at org.pentaho.di.core.database.Database.normalConnect(Database.java:400)
    ... 60 more
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:377)
    at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1036)
    at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:338)
    at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2232)
    at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2265)
    at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2064)
    at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:790)
    at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:44)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:377)
    at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:395)
    at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:325)
    at java.sql.DriverManager.getConnection(DriverManager.java:582)
    at java.sql.DriverManager.getConnection(DriverManager.java:185)
    at org.pentaho.di.core.database.Database.connectUsingClass(Database.java:543)
    ... 61 more
Caused by: java.net.ConnectException: Connection refused
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:382)
    at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:241)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:228)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:431)
    at java.net.Socket.connect(Socket.java:527)
    at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:213)
    at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:297)
    ... 76 more

主机名：本地主机 端口：3306 数据库名称：my_learning_sql

Answer 1

1. 从这里下载Mysql连接器：connector
2. 解压文件
3. 仅将两个 *.jar 文件复制到 data-integration/lib/ 中
4. 重启 Pentaho
5. 转到：数据库连接 -> 选择 MySql -> 编辑连接信息 -> 测试连接。

这些步骤解决了我的问题。

Answer 2

我遇到了类似的问题（您在上面列出的驱动程序、操作系统等的版本相同），最后追踪到了这个问题：我的~/.kettle/kettle.properties 文件没有列出相同的 DB 主机设置转换中的数据库连接方式列出了它。

deweygarwood$ cat ~/.kettle/kettle.properties 
# This file was generated by Pentaho Data Integration version 5.1.2.1.
... stuff here

DW_HOST=localhost <~~~ this line
DW_DBPORT=3306
DW_DBNAME=datawarehouse
DW_DBUSER=root
DW_DBPASSWORD=

与kettle 转换中我的数据库连接中列出的名称不匹配，即${DW_DBHOST}

我发现这一点的方法是使用数据库连接屏幕上的“测试”按钮并滚动到底部。输出显示变量“${DW_DBHOST}”而不是“localhost”。更新我的 ~/.kettle/kettle.properties 文件以使用相同的变量名解决了这个问题。

假设您使用kettle.properties 进行连接设置，我预计会出现类似情况。

Answer 3

我看到这个问题取决于数据库的版本和 MySQL 驱动程序的版本。我正在使用 mysql-connector-java-5.1.17.jar 并且必须升级到 mysql-connector-java-5.1.34-bin.jar 才能让我的工作。也许您的问题正好相反，您可以将驱动程序降级为 mysql-connector-java-5.1.17.jar 来修复您的问题？