请问kettle这里怎么解决

mgfvalen 2021-06-20 20:18:44

kettle安装好，连接mysql数据库出现了这个问题，想问下怎么解决

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)
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.

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)
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.normalConnect(Database.java:472)
   at org.pentaho.di.core.database.Database.connect(Database.java:370)
   at org.pentaho.di.core.database.Database.connect(Database.java:341)
   at org.pentaho.di.core.database.Database.connect(Database.java:331)
   at org.pentaho.di.core.database.DatabaseFactory.getConnectionTestReport(DatabaseFactory.java:83)
   at org.pentaho.di.core.database.DatabaseFactory.getConnectionTestResults(DatabaseFactory.java:112)
   at org.pentaho.di.core.database.DatabaseMeta.testConnectionSuccess(DatabaseMeta.java:2811)
   at org.pentaho.ui.database.event.DataHandler.testDatabaseConnection(DataHandler.java:621)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:498)
   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$4.widgetSelected(SwtButton.java:137)
   at org.eclipse.swt.widgets.TypedListener.handleEvent(Unknown Source)
   at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)
   at org.eclipse.swt.widgets.Display.sendEvent(Unknown Source)
   at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
   at org.eclipse.swt.widgets.Display.runDeferredEvents(Unknown Source)
   at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
   at org.eclipse.jface.window.Window.runEventLoop(Window.java:820)
   at org.eclipse.jface.window.Window.open(Window.java:796)
   at org.pentaho.di.ui.xul.KettleDialog.show(KettleDialog.java:80)
   at org.pentaho.di.ui.xul.KettleDialog.show(KettleDialog.java:47)
   at org.pentaho.di.ui.core.database.dialog.XulDatabaseDialog.open(XulDatabaseDialog.java:116)
   at org.pentaho.di.ui.core.database.dialog.DatabaseDialog.open(DatabaseDialog.java:61)
   at org.pentaho.di.ui.repo.controller.RepositoryConnectController.lambda$editDatabaseConnection$2(RepositoryConnectController.java:157)
   at org.eclipse.swt.widgets.RunnableLock.run(Unknown Source)
   at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Unknown Source)
   at org.eclipse.swt.widgets.Display.runAsyncMessages(Unknown Source)
   at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
   at org.pentaho.di.ui.repo.dialog.RepositoryDialog.open(RepositoryDialog.java:95)
   at org.pentaho.di.ui.repo.dialog.RepositoryDialog.open(RepositoryDialog.java:77)
   at org.pentaho.di.ui.repo.dialog.RepositoryDialog.open(RepositoryDialog.java:73)
   at org.pentaho.di.ui.repo.dialog.RepositoryDialog.openManager(RepositoryDialog.java:104)
   at org.pentaho.di.ui.repo.menu.RepositoryConnectMenu$2$2.widgetSelected(RepositoryConnectMenu.java:180)
   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.Display.runDeferredEvents(Unknown Source)
   at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
   at org.pentaho.di.ui.spoon.Spoon.readAndDispatch(Spoon.java:1381)
   at org.pentaho.di.ui.spoon.Spoon.waitForDispose(Spoon.java:7817)
   at org.pentaho.di.ui.spoon.Spoon.start(Spoon.java:9179)
   at org.pentaho.di.ui.spoon.Spoon.main(Spoon.java:707)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:498)
   at org.pentaho.commons.launcher.Launcher.main(Launcher.java:92)
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:583)
   at org.pentaho.di.core.database.Database.normalConnect(Database.java:456)
   ... 53 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:62)
   at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
   at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
   at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
   at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1121)
   at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:357)
   at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2484)
   at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2521)
   at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2306)
   at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:839)
   at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:49)
   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:423)
   at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
   at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:421)
   at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:350)
   at java.sql.DriverManager.getConnection(DriverManager.java:664)
   at java.sql.DriverManager.getConnection(DriverManager.java:208)
   at org.pentaho.di.core.database.Database.connectUsingClass(Database.java:567)
   ... 54 more
Caused by: java.net.ConnectException: Connection refused: connect
   at java.net.DualStackPlainSocketImpl.connect0(Native Method)
   at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
   at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
   at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
   at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
   at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
   at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
   at java.net.Socket.connect(Socket.java:589)
   at java.net.Socket.connect(Socket.java:538)
   at java.net.Socket.<init>(Socket.java:434)
   at java.net.Socket.<init>(Socket.java:244)
   at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:259)
   at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:307)
   ... 69 more