一、报错内容：
Unable to load step info from XML step nodeorg.pentaho.di.core.exception.KettleXMLException:
Unable to load step info from XML
at org.pentaho.commons.launcher.Launcher.main (Launcher.java:92)
at java.lang.reflect.Method.invoke (Method.java:498)
at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
at sun.reflect.NativeMethodAccessorImpl.invoke0 (NativeMethodAccessorImpl.java:-2)
at org.pentaho.di.ui.spoon.Spoon.main (Spoon.java:707)
at org.pentaho.di.ui.spoon.Spoon.start (Spoon.java:9179)
at org.pentaho.di.ui.spoon.Spoon.waitForDispose (Spoon.java:7817)
at org.pentaho.di.ui.spoon.Spoon.readAndDispatch (Spoon.java:1381)
at org.eclipse.swt.widgets.Display.readAndDispatch (null:-1)
at org.eclipse.swt.widgets.Display.runDeferredEvents (null:-1)
at org.eclipse.swt.widgets.Widget.sendEvent (null:-1)
at org.eclipse.swt.widgets.Display.sendEvent (null:-1)
at org.eclipse.swt.widgets.EventTable.sendEvent (null:-1)
at org.eclipse.jface.action.ActionContributionItem$5.handleEvent (ActionContributionItem.java:402)
at org.eclipse.jface.action.ActionContributionItem.access$2 (ActionContributionItem.java:490)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection (ActionContributionItem.java:545)
at org.eclipse.jface.action.Action.runWithEvent (Action.java:498)
at org.pentaho.ui.xul.jface.tags.JfaceMenuitem$1.run (JfaceMenuitem.java:106)
at org.pentaho.ui.xul.jface.tags.JfaceMenuitem.access$100 (JfaceMenuitem.java:43)
at org.pentaho.ui.xul.impl.AbstractXulComponent.invoke (AbstractXulComponent.java:141)
at org.pentaho.ui.xul.impl.AbstractXulComponent.invoke (AbstractXulComponent.java:157)
at org.pentaho.ui.xul.impl.AbstractXulDomContainer.invoke (AbstractXulDomContainer.java:313)
at java.lang.reflect.Method.invoke (Method.java:498)
at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
at sun.reflect.NativeMethodAccessorImpl.invoke0 (NativeMethodAccessorImpl.java:-2)
at org.pentaho.di.ui.spoon.Spoon.openFile (Spoon.java:4252)
at org.pentaho.di.ui.spoon.Spoon.openFile (Spoon.java:4315)
at org.pentaho.di.ui.spoon.Spoon.openFile (Spoon.java:4637)
at org.pentaho.di.ui.spoon.TransFileListener.open (TransFileListener.java:61)
at org.pentaho.di.trans.TransMeta.loadXML (TransMeta.java:3075)
at org.pentaho.di.trans.step.StepMeta.<init> (StepMeta.java:321)
at org.pentaho.di.trans.steps.fileinput.text.TextFileInputMeta.loadXML (TextFileInputMeta.java:328)
at org.pentaho.big.data.kettle.plugins.hdfs.trans.HadoopFileInputMeta.loadSource (HadoopFileInputMeta.java:108)
at org.pentaho.big.data.kettle.plugins.hdfs.trans.HadoopFileInputMeta.loadUrl (HadoopFileInputMeta.java:145)
at org.pentaho.di.core.vfs.KettleVFS.getFileObject (KettleVFS.java:105)
at org.pentaho.di.core.vfs.KettleVFS.getFileObject (KettleVFS.java:109)
at org.pentaho.di.core.vfs.KettleVFS.getFileObject (KettleVFS.java:152)
at org.apache.commons.vfs2.impl.DefaultFileSystemManager.resolveFile (DefaultFileSystemManager.java:648)
at org.pentaho.di.core.vfs.ConcurrentFileSystemManager.resolveFile (ConcurrentFileSystemManager.java:91)
at org.apache.commons.vfs2.impl.DefaultFileSystemManager.resolveFile (DefaultFileSystemManager.java:711)
at org.apache.commons.vfs2.provider.AbstractOriginatingFileProvider.findFile (AbstractOriginatingFileProvider.java:55)
at org.apache.commons.vfs2.provider.AbstractOriginatingFileProvider.findFile (AbstractOriginatingFileProvider.java:71)
at org.apache.commons.vfs2.provider.AbstractOriginatingFileProvider.getFileSystem (AbstractOriginatingFileProvider.java:93)
at org.apache.commons.vfs2.provider.AbstractFileProvider.addFileSystem (AbstractFileProvider.java:96)
at org.apache.commons.vfs2.provider.AbstractVfsContainer.addComponent (AbstractVfsContainer.java:49)
at org.apache.commons.vfs2.provider.AbstractFileSystem.init (AbstractFileSystem.java:115)
at org.pentaho.big.data.impl.vfs.hdfs.HDFSFileSystem.addCapabilities (HDFSFileSystem.java:52)
二、日志解读
kettle日志有个特点，最后被调用的栈\代码在最下边，这和java是相反的。所以从下往上看报错就对了。
（1）此处报空指针。HDFSFileSystem.addCapabilities 可能是hadoop fileSystem（以下简称fs）没有取到。
（2）在之前果然有取fs的代码 AbstractOriginatingFileProvider.getFileSystem
所以可以推断kettle在读取ktr或kjb时候就会尝试获取fs，但是后面代码缺少校验，所以包空指针错误。
所以直接文本编辑器打开ktr文件，可以看到类似下边的内容：
三、检验和解决
- haoop是否可以连接
- ktr里的
source_configuration_name指定的配置名称是否在kettle中有配置
