[HOP-2042] NPE when gathering preview data

• Type: Bug
• Status: Closed
• Priority: Low
• Resolution: Done
• Affects Version/s: pre-apache
• Fix Version/s: pre-apache
• Component/s: Transforms
• Labels: pre-apache user_experience
• Assignee: Unassigned
• Reporter: Maximilian Michels
• Created: 04/Oct/20 12:22
• Updated: 04/Oct/20 12:50
• Resolved: 04/Oct/20 12:31

Description

Logged in the console, not impacting the user experience AFAICT.

Error in the Hop GUI : Failed to execute runnable (java.lang.NullPointerException)
org.eclipse.swt.SWTException: Failed to execute runnable (java.lang.NullPointerException)
at org.eclipse.swt.SWT.error(SWT.java:4723)
at org.eclipse.swt.SWT.error(SWT.java:4638)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:188)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4930)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4451)
at org.apache.hop.ui.core.dialog.PreviewRowsDialog.open(PreviewRowsDialog.java:253)
at org.apache.hop.ui.hopgui.file.pipeline.HopGuiPipelineGraph.mouseUp(HopGuiPipelineGraph.java:817)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:224)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:5687)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1423)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4955)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4448)
at org.apache.hop.ui.hopgui.HopGui.open(HopGui.java:353)
at org.apache.hop.ui.hopgui.HopGui.main(HopGui.java:297)
Caused by: java.lang.NullPointerException
at java.util.LinkedList.node(LinkedList.java:577)
at java.util.LinkedList.get(LinkedList.java:477)
at org.apache.hop.ui.core.dialog.PreviewRowsDialog.lambda$getData$5(PreviewRowsDialog.java:341)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:40)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:185)
... 12 more