我是 Pentaho 的新手。我正在尝试使用 Pentaho Data Integration Community Edition 从 MongoDB 读取数据。在尝试执行 MongoDB 输入步骤时，我收到身份验证失败错误。我发现，错误是由于 PDI 中缺少 MongoDb 驱动程序。
后来我下载了mongodb-driver-3.2.2.jar文件，添加到位置E:\pdi-ce-6.0.1.0-386\data-integration\lib。但问题仍然存在。
在尝试通过在 Pentaho MongoDb 输入步骤中提供 MongoDb 连接详细信息来获取 Dbs 时，我收到错误 java.nullpointerException。
有人可以让我知道我在这里做错了什么吗？
尝试通过在Spoon中提供有效的 Mongo 服务器详细信息来获取数据库时出现错误消息：
Unable to connect to MongoDB - check connection details : 'ok' should never be null...
错误详细信息和可能异常的堆栈跟踪：
org.pentaho.di.core.exception.KettleException:
java.lang.IllegalArgumentException: 'ok' should never be null...
'ok' should never be null...
at org.pentaho.mongo.wrapper.NoAuthMongoClientWrapper.getDatabaseNames(NoAuthMongoClientWrapper.java:358)
at org.pentaho.di.ui.trans.steps.mongodbinput.MongoDbInputDialog.setupDBNames(MongoDbInputDialog.java:1442)
at org.pentaho.di.ui.trans.steps.mongodbinput.MongoDbInputDialog.access$300(MongoDbInputDialog.java:82)
at org.pentaho.di.ui.trans.steps.mongodbinput.MongoDbInputDialog$4.widgetSelected(MongoDbInputDialog.java:450)
at org.eclipse.swt.widgets.TypedListener.handleEvent(Unknown Source)
at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Unknown Source)
at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
at org.pentaho.di.ui.trans.steps.mongodbinput.MongoDbInputDialog.open(MongoDbInputDialog.java:1079)
at org.pentaho.di.ui.spoon.delegates.SpoonStepsDelegate.editStep(SpoonStepsDelegate.java:124)
at org.pentaho.di.ui.spoon.Spoon.editStep(Spoon.java:8797)
at org.pentaho.di.ui.spoon.trans.TransGraph.editStep(TransGraph.java:3027)
at org.pentaho.di.ui.spoon.trans.TransGraph.mouseDoubleClick(TransGraph.java:744)
at org.eclipse.swt.widgets.TypedListener.handleEvent(Unknown Source)
at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Unknown Source)
at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
at org.pentaho.di.ui.spoon.Spoon.readAndDispatch(Spoon.java:1316)
at org.pentaho.di.ui.spoon.Spoon.waitForDispose(Spoon.java:7979)
at org.pentaho.di.ui.spoon.Spoon.start(Spoon.java:9310)
at org.pentaho.di.ui.spoon.Spoon.main(Spoon.java:654)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.pentaho.commons.launcher.Launcher.main(Launcher.java:92)
Caused by: java.lang.IllegalArgumentException: 'ok' should never be null...
at com.mongodb.CommandResult.ok(CommandResult.java:43)
at com.mongodb.CommandResult.throwOnError(CommandResult.java:109)
at com.mongodb.DBPort$NativeAuthenticator.authenticate(DBPort.java:545)
at com.mongodb.DBPort.authenticate(DBPort.java:322)
at com.mongodb.DBPort.checkAuth(DBPort.java:333)
at com.mongodb.DBTCPConnector.innerCall(DBTCPConnector.java:243)
at com.mongodb.DBTCPConnector.call(DBTCPConnector.java:216)
at com.mongodb.DBApiLayer$MyCollection.__find(DBApiLayer.java:288)
at com.mongodb.DB.command(DB.java:261)
at com.mongodb.DB.command(DB.java:243)
at com.mongodb.DB.command(DB.java:300)
at com.mongodb.Mongo.getDatabaseNames(Mongo.java:384)
at org.pentaho.mongo.wrapper.NoAuthMongoClientWrapper.getDatabaseNames(NoAuthMongoClientWrapper.java:353)