在連線資料庫時報錯誤：連線資料庫 [db2dj] : org.pentaho.di.core.exception.KettleDatabaseException: 
Error occurred while trying to connect to the database

Error connecting to database: (using class nl.cwi.monetdb.jdbc.MonetDriver)
Unable to connect (localhost:50000): Connection refused: connect

org.pentaho.di.core.exception.KettleDatabaseException: 
Error occurred while trying to connect to the database

Error connecting to database: (using class nl.cwi.monetdb.jdbc.MonetDriver)
Unable to connect (localhost:50000): Connection refused: connect

    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:80)
    at org.pentaho.di.core.database.DatabaseMeta.testConnection(DatabaseMeta.java:2783)
    at org.pentaho.ui.database.event.DataHandler.testDatabaseConnection(DataHandler.java:597)
    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:483)
    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:60)
    at org.pentaho.di.ui.spoon.delegates.SpoonDBDelegate.newConnection(SpoonDBDelegate.java:485)
    at org.pentaho.di.ui.spoon.delegates.SpoonDBDelegate.newConnection(SpoonDBDelegate.java:472)
    at org.pentaho.di.ui.spoon.Spoon.doubleClickedInTree(Spoon.java:3073)
    at org.pentaho.di.ui.spoon.Spoon.doubleClickedInTree(Spoon.java:3043)
    at org.pentaho.di.ui.spoon.Spoon.access$2300(Spoon.java:361)
    at org.pentaho.di.ui.spoon.Spoon$26.widgetDefaultSelected(Spoon.java:6184)
    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:1366)
    at org.pentaho.di.ui.spoon.Spoon.waitForDispose(Spoon.java:8022)
    at org.pentaho.di.ui.spoon.Spoon.start(Spoon.java:9277)
    at org.pentaho.di.ui.spoon.Spoon.main(Spoon.java:692)
    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:483)
    at org.pentaho.commons.launcher.Launcher.main(Launcher.java:92)
Caused by: org.pentaho.di.core.exception.KettleDatabaseException: 
Error connecting to database: (using class nl.cwi.monetdb.jdbc.MonetDriver)
Unable to connect (localhost:50000): Connection refused: connect

    at org.pentaho.di.core.database.Database.connectUsingClass(Database.java:585)
    at org.pentaho.di.core.database.Database.normalConnect(Database.java:456)
    ... 48 more
Caused by: java.sql.SQLException: Unable to connect (localhost:50000): Connection refused: connect
    at nl.cwi.monetdb.jdbc.MonetConnection.<init>(MonetConnection.java:249)
    at nl.cwi.monetdb.jdbc.MonetDriver.connect(MonetDriver.java:171)
    at java.sql.DriverManager.getConnection(DriverManager.java:664)
    at java.sql.DriverManager.getConnection(DriverManager.java:247)
    at org.pentaho.di.core.database.Database.connectUsingClass(Database.java:567)
    ... 49 more

主機名       : localhost
埠           : 50000
資料庫名:market4!

解決方法：在spoon安裝目錄下/data-integration\libext\JDBC新增db2驅動jar包。

連線成功！