Re: Question about "Unhandled event loop exception, java.lang.NullPointerException“ problem of Control System Studio

["Wilson, Andy \(DLSLtd, RAL, LSCI\) via Tech-talk" <tech-talk at aps.anl.gov>]

This sounds similar to this issue although the error messages are different: https://github.com/ControlSystemStudio/cs-studio/issues/2660

You would see this if you are using eclipse 2020-12.

It was worked around in this commit https://github.com/ControlSystemStudio/cs-studio/commit/76e69eb40a182191094cae3ab2fb9b9899a356d5

Andy

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From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of lzfneu--- via Tech-talk <tech-talk at aps.anl.gov>
Sent: Tuesday, November 2, 2021 13:13
To: tech-talk at aps.anl.gov <Tech-talk at aps.anl.gov>
Subject: Question about "Unhandled event loop exception, java.lang.NullPointerException“ problem of Control System Studio

 

Dear all,

I use Control System Studio (CSS) in CentOS 7 OS and often meet no respond problem of CSS, when opening BOY containig databrowser widget to display history and live data of my monitor sites.

I could always trigger the  no respond problem like this:

There are several button widgets for my monitor sites in the BOY, the databrowser plots for each monitor sites could be opened by clicking the button of the site. I could always trigger no respond problem of CSS after clicking several buttons to open several databrowser plots. I wonder do you meet the same problems and how to solve it. Any help or suggestions are appreciated and thanks in advance.

The no respond error messages in terminal are shown as follows:

2021-11-02 16:20:30.969 SEVERE [Thread 1] org.csstudio.logging.PluginLogListener (logging) - Unhandled event loop exception

java.lang.NullPointerException

at org.csstudio.swt.rtplot.internal.TimeTicks$TickConfig.access$5(TimeTicks.java:60)

at org.csstudio.swt.rtplot.internal.TimeTicks.format(TimeTicks.java:241)

at org.csstudio.swt.rtplot.internal.TimeTicks.format(TimeTicks.java:1)

at org.csstudio.swt.rtplot.internal.TimeAxis.drawTickLabel(TimeAxis.java:188)

at org.csstudio.swt.rtplot.internal.TimeAxis.drawTickLabel(TimeAxis.java:1)

at org.csstudio.swt.rtplot.internal.Plot.drawMouseModeFeedback(Plot.java:780)

at org.csstudio.swt.rtplot.internal.Plot.paintControl(Plot.java:753)

at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:231)

at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)

at org.eclipse.swt.widgets.Display.sendEvent(Display.java:5227)

at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1340)

at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1366)

at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1349)

at org.eclipse.swt.widgets.Control.gtk_expose_event(Control.java:3390)

at org.eclipse.swt.widgets.Composite.gtk_expose_event(Composite.java:771)

at org.eclipse.swt.widgets.Canvas.gtk_expose_event(Canvas.java:182)

at org.eclipse.swt.widgets.Widget.windowProc(Widget.java:1993)

at org.eclipse.swt.widgets.Control.windowProc(Control.java:5827)

at org.eclipse.swt.widgets.Display.windowProc(Display.java:5498)

at org.eclipse.swt.internal.gtk.OS._gtk_main_do_event(Native Method)

at org.eclipse.swt.internal.gtk.OS.gtk_main_do_event(OS.java:9545)

at org.eclipse.swt.widgets.Display.eventProc(Display.java:1275)

at org.eclipse.swt.internal.gtk.OS._g_main_context_iteration(Native Method)

at org.eclipse.swt.internal.gtk.OS.g_main_context_iteration(OS.java:2495)

at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4149)

at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1121)

at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)

at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1022)

at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:150)

at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:693)

at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)

at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:610)

at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)

at org.csstudio.utility.product.Workbench.runWorkbench(Workbench.java:99)

at org.csstudio.startup.application.Application.startApplication(Application.java:265)

at org.csstudio.startup.application.Application.start(Application.java:119)

at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)

at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)

at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)

at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)

at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:673)

at org.eclipse.equinox.launcher.Main.basicRun(Main.java:610)

at org.eclipse.equinox.launcher.Main.run(Main.java:1519)

at org.eclipse.equinox.launcher.Main.main(Main.java:1492)

 

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