GroupBy error

Hello Knime team.

After updating to 4.4.2 I am having this issue with GroupBy node:

2021-10-25 10:47:45,253 : ERROR : main :  : Node : GroupBy : 4:284:0:220 : Configure failed (NoClassDefFoundError): Could not initialize class org.knime.base.node.preproc.groupby.GroupByTable
java.lang.NoClassDefFoundError: Could not initialize class org.knime.base.node.preproc.groupby.GroupByTable
	at org.knime.base.node.preproc.groupby.GroupByNodeModel.createGroupBySpec(GroupByNodeModel.java:625)
	at org.knime.base.node.preproc.groupby.GroupByNodeModel.configure(GroupByNodeModel.java:592)
	at org.knime.base.node.preproc.groupby.GroupByNodeModel.configure(GroupByNodeModel.java:1)
	at org.knime.core.node.NodeModel.configureModel(NodeModel.java:1077)
	at org.knime.core.node.Node.invokeNodeModelConfigure(Node.java:1957)
	at org.knime.core.node.Node.configure(Node.java:1893)
	at org.knime.core.node.workflow.NativeNodeContainer.performConfigure(NativeNodeContainer.java:530)
	at org.knime.core.node.workflow.SingleNodeContainer.callNodeConfigure(SingleNodeContainer.java:304)
	at org.knime.core.node.workflow.SingleNodeContainer.configure(SingleNodeContainer.java:189)
	at org.knime.core.node.workflow.WorkflowManager.configureSingleNodeContainer(WorkflowManager.java:6406)
	at org.knime.core.node.workflow.WorkflowManager.configureNodeAndPortSuccessors(WorkflowManager.java:6565)
	at org.knime.core.node.workflow.WorkflowManager.configureNodeAndSuccessors(WorkflowManager.java:6508)
	at org.knime.core.node.workflow.WorkflowManager.resetAndConfigureNodeAndSuccessors(WorkflowManager.java:5194)
	at org.knime.core.node.workflow.WorkflowManager.resetAndConfigureNode(WorkflowManager.java:5115)
	at org.knime.core.node.workflow.WorkflowManager.addConnection(WorkflowManager.java:1242)
	at org.knime.core.node.workflow.WorkflowManager.addConnection(WorkflowManager.java:1158)
	at org.knime.core.ui.wrapper.WorkflowManagerWrapper.addConnection(WorkflowManagerWrapper.java:216)
	at org.knime.workbench.editor2.commands.CreateConnectionCommand.lambda$2(CreateConnectionCommand.java:404)
	at org.knime.workbench.ui.async.AsyncUtil.wfmAsyncSwitchRethrow(AsyncUtil.java:200)
	at org.knime.workbench.editor2.commands.CreateConnectionCommand.createConnection(CreateConnectionCommand.java:404)
	at org.knime.workbench.editor2.commands.CreateConnectionCommand.execute(CreateConnectionCommand.java:331)
	at org.eclipse.gef.commands.CommandStack.execute(CommandStack.java:228)
	at org.eclipse.gef.tools.AbstractTool.executeCommand(AbstractTool.java:425)
	at org.eclipse.gef.tools.AbstractTool.executeCurrentCommand(AbstractTool.java:438)
	at org.eclipse.gef.tools.AbstractConnectionCreationTool.handleCreateConnection(AbstractConnectionCreationTool.java:256)
	at org.eclipse.gef.tools.ConnectionDragCreationTool.handleButtonUp(ConnectionDragCreationTool.java:63)
	at org.eclipse.gef.tools.AbstractTool.mouseMove(AbstractTool.java:1159)
	at org.eclipse.gef.tools.SelectionTool.mouseMove(SelectionTool.java:562)
	at org.eclipse.gef.EditDomain.mouseMove(EditDomain.java:287)
	at org.eclipse.gef.ui.parts.DomainEventDispatcher.dispatchMouseMoved(DomainEventDispatcher.java:365)
	at org.eclipse.draw2d.LightweightSystem$EventHandler.mouseMove(LightweightSystem.java:543)
	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:216)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:5831)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1427)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:5092)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4570)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1157)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1046)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155)
	at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:644)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:551)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:156)
	at org.knime.product.rcp.KNIMEApplication.start(KNIMEApplication.java:184)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
	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:401)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.base/java.lang.reflect.Method.invoke(Unknown Source)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:653)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:590)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1461)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1434)

This error also prevents opening the node dialog. The problem occurs both with the existing nodes in the workflow, and those I am adding. The GroupBy nodes cannot be executed even if they were previously set up correctly.

If it will be useful, I am using Kubuntu 20.04 and here is the information about my Java environment:
openjdk 11.0.11 2021-04-20
OpenJDK Runtime Environment (build 11.0.11+9-Ubuntu-0ubuntu2.20.04)
OpenJDK 64-Bit Server VM (build 11.0.11+9-Ubuntu-0ubuntu2.20.04, mixed mode, sharing)

Please let me know if you need some more details.

1 Like

Hello @Artem,

you reported this issue some time ago. Did yo manage to find a solution to it or still need help?

Br,
Ivan

Hi Ivan,

I just re-installed Knime and it worked. However it happened when I upgraded from 4.4.1 to 4.4.2
For some reason the installation got broken that time, and I also had issues with other nodes. Not exactly sure what happened there.

1 Like

Hello @Artem,

glad to hear you fixed it. Yep, have seen from time to time that update can go wrong. -clean can help then but usually reinstalling is a way to go.

Br,
Ivan

1 Like

I tried adding -clean to knime.ini actually, and it did not help. Still, I guess the problem is resolved now, and unfortunately I do not know how to reproduce it.

1 Like

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