Analytic View Pane Null Pointer

Prerequisites

• Put an X between the brackets on this line if you have done all of the following:
  • Running the latest version of Constellation
  • Attached the Support Package via Help > Support Package
  • Checked the FAQs: https://github.com/constellation-app/constellation/wiki/FAQ
  • Checked that your issue isn’t already filed: https://github.com/constellation-app/constellation/issues
  • Checked that there is not already a module that provides the described functionality: https://github.com/constellation-app/constellation/wiki/Catalogue-of-Repositories

Description

A null pointer with the below stack trace occurs when no graph is opened, and categories or questions are opened and selected/deselected. I then opened a new blank graph and noticed the exception. I did not notice the exact point in time which this occurred - but it does happen.

java.lang.NullPointerException
	at au.gov.asd.tac.constellation.views.analyticview.AnalyticConfigurationPane.lambda$updateSelectablePluginsParameters$29(AnalyticConfigurationPane.java:528)
	at java.base/java.lang.Iterable.forEach(Unknown Source)
	at au.gov.asd.tac.constellation.views.analyticview.AnalyticConfigurationPane.updateSelectablePluginsParameters(AnalyticConfigurationPane.java:524)
	at au.gov.asd.tac.constellation.views.analyticview.AnalyticConfigurationPane.setPluginsFromSelectedQuestion(AnalyticConfigurationPane.java:509)
	at au.gov.asd.tac.constellation.views.analyticview.AnalyticConfigurationPane.lambda$new$17(AnalyticConfigurationPane.java:236)
	at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$10(Unknown Source)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$11(Unknown Source)
[catch] at javafx.graphics/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(Unknown Source)
	at javafx.graphics/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(Unknown Source)
	at java.base/java.lang.Thread.run(Unknown Source)

Steps to Reproduce

1. Open Analytic View
2. Open Categories and Questions
3. Select/Deselect various plugins and parameters (Exception may have occurred here)
4. Open a new blank graph. (Exception may have occurred here)

The exact replicator is not known. Running .exe of 2.0 beta Expected behaviour: No exception

Actual behaviour: Exception - Null pointer

Reproduces how often: Only appeared once

Additional Information

Does not appear to occur in previous releases

[antares1470]

Sorry @antares1470 I don’t remember which options I selected. At first I was just selecting options at random which got it to occur. I had another go at this issue a few weeks ago and I went through and tested each section by selecting each option from it, then I selected a bunch at random again and still couldn’t reproduce it ☹️.

I was doing both, I tried a few times just closing the graph and then I would restart constellation. If I recall correctly, the one time I reproduced it, it occurred right after I had relaunched constellation.

Cheers @formalhaut69. I’m just looking for more reliable ways of replicating the bug. It sounds like you’ve exhausted most of the options though so I guess my primary focus will be on the stack trace that you and @aldebaran30701 managed to get (maybe I’ll get lucky and replicate it myself)

[formalhaut69]

@formalhaut69 I know this was a little bit ago but do you happen to remember exactly which analytics in the centrality category you selected when the error occurred?

Also when trying to reproduce the error, did you close Constellation between each attempt or just close the graph between each attempt?

Sorry @antares1470 I don’t remember which options I selected. At first I was just selecting options at random which got it to occur. I had another go at this issue a few weeks ago and I went through and tested each section by selecting each option from it, then I selected a bunch at random again and still couldn’t reproduce it ☹️.

I was doing both, I tried a few times just closing the graph and then I would restart constellation. If I recall correctly, the one time I reproduced it, it occurred right after I had relaunched constellation.