我是talend工具的新手，我正在尝试创建一个我已经建立了数据库连接的工作它之前工作正常但是因为我重新启动了talend我必须将现有项目导入到新工作区并且现在连接我得不到
Connection failure. You must change the Database Settings.
java.lang.RuntimeException: java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection
at org.talend.core.model.metadata.builder.database.JDBCDriverLoader.getConnection(JDBCDriverLoader.java:179)
at org.talend.core.model.metadata.builder.database.ExtractMetaDataUtils.connect(ExtractMetaDataUtils.java:1034)
at org.talend.core.model.metadata.builder.database.ExtractMetaDataFromDataBase.testConnection(ExtractMetaDataFromDataBase.java:300)
at org.talend.repository.ui.utils.ManagerConnection.check(ManagerConnection.java:293)
at org.talend.repository.ui.wizards.metadata.connection.database.DatabaseForm.checkConnection(DatabaseForm.java:2008)
at org.talend.repository.ui.wizards.metadata.connection.database.DatabaseForm.access$39(DatabaseForm.java:1933)
at org.talend.repository.ui.wizards.metadata.connection.database.DatabaseForm$23.widgetSelected(DatabaseForm.java:2261)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:234)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4066)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3657)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)
at org.eclipse.jface.window.Window.open(Window.java:801)
at org.talend.repository.ui.actions.metadata.CreateConnectionAction.doRun(CreateConnectionAction.java:207)
at org.talend.repository.ui.actions.AContextualAction$2.run(AContextualAction.java:608)
at org.talend.repository.RepositoryWorkUnit.executeRun(RepositoryWorkUnit.java:93)
at org.talend.core.repository.model.AbstractRepositoryFactory.executeRepositoryWorkUnit(AbstractRepositoryFactory.java:237)
at org.talend.repository.localprovider.model.LocalRepositoryFactory.executeRepositoryWorkUnit(LocalRepositoryFactory.java:3197)
at org.talend.core.repository.model.ProxyRepositoryFactory.executeRepositoryWorkUnit(ProxyRepositoryFactory.java:1979)
at org.talend.repository.ui.actions.AContextualAction.run(AContextualAction.java:617)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4066)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3657)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.talend.rcp.intro.Application.start(Application.java:145)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:369)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:619)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)
at org.eclipse.equinox.launcher.Main.run(Main.java:1407)
Caused by: java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:489)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:553)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:254)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:528)
at org.talend.core.model.metadata.builder.database.DriverShim.connect(DriverShim.java:41)
at org.talend.core.model.metadata.builder.database.JDBCDriverLoader.getConnection(JDBCDriverLoader.java:170)
... 48 more
Caused by: oracle.net.ns.NetException: The Network Adapter could not establish the connection
at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:439)
at oracle.net.resolver.AddrResolution.resolveAndExecute(AddrResolution.java:454)
at oracle.net.ns.NSProtocol.establishConnection(NSProtocol.java:693)
at oracle.net.ns.NSProtocol.connect(NSProtocol.java:251)
at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1140)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:340)
... 54 more
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(Unknown Source)
at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at oracle.net.nt.TcpNTAdapter.connect(TcpNTAdapter.java:149)
at oracle.net.nt.ConnOption.connect(ConnOption.java:133)
at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:405)
... 59 more
帮我解决此问题。我搜索了很多，但无法解决这个问题。
答案 0 :(得分：0)
您获得的错误可能只是指向无法从您的计算机访问数据库的事实，因为无法访问主机名。
要验证相同，请尝试使用您选择的任何IDe连接到数据库 - SQLDeveloper / Toad或只是SQL * plus。
答案 1 :(得分：0)
尝试检查您的连接详细信息，有时可能会将无关的值传递给组件的连接详细信息，例如传递错误的上下文变量或值。 或者有时候您的输出或输入组件可能没有与传递上下文的组件相关联。
**检查：**尝试打印您传递的连接详细信息，看看它们是否合适。如果没有尝试通过检查上述情况找出可能的原因。