Interactive View NullPointerException

mwiegand · September 25, 2024, 10:33am

Hi,

continuing work on a workflow I noticed that Knime throws this error related to a Component Output not finishing …

Resetting the component does not work. I recall that I faced a similiar issue before.

Time Stamp	Log
2024-09-25 12:27:01,521	ERROR Bar Chart 3:1581:0:1383:0:1380 {internalError:{typeName:java.lang.NullPointerException,message:View settings were accessed before loaded,stackTrace:[java.base/java.util.Objects.requireNonNull(Unknown Source),org.knime.base.views.node.BaseViewsNodeView.getViewSettings(BaseViewsNodeView.java:120),org.knime.base.views.node.BaseViewsNodeView.lambda$2(BaseViewsNodeView.java:115),org.knime.core.webui.data.InitialDataService.getInitialData(InitialDataService.java:109),org.knime.core.webui.node.DataServiceManager.callInitialDataService(DataServiceManager.java:143),org.knime.gateway.api.entity.UIExtensionEnt.(UIExtensionEnt.java:120),org.knime.gateway.api.entity.NodeViewEnt.(NodeViewEnt.java:168),org.knime.gateway.api.entity.NodeViewEnt.create(NodeViewEnt.java:104),org.knime.gateway.api.entity.NodeViewEnt.create(NodeViewEnt.java:94),org.knime.js.cef.pagebuilder.PageBuilderUtil.initializePageBuilderImageGeneration(PageBuilderUtil.java:153),org.knime.js.cef.headless.CEFHeadlessUtil.generateContent(CEFHeadlessUtil.java:209),org.knime.js.cef.headless.CEFHeadlessUtil.generatePng(CEFHeadlessUtil.java:115),org.knime.base.views.node.BaseViewsNodeModel.execute(BaseViewsNodeModel.java:248),org.knime.core.node.NodeModel.executeModel(NodeModel.java:588),org.knime.core.node.Node.invokeFullyNodeModelExecute(Node.java:1286),org.knime.core.node.Node.execute(Node.java:1049),org.knime.core.node.workflow.NativeNodeContainer.performExecuteNode(NativeNodeContainer.java:594),org.knime.core.node.exec.LocalNodeExecutionJob.mainExecute(LocalNodeExecutionJob.java:98),org.knime.core.node.workflow.NodeExecutionJob.internalRun(NodeExecutionJob.java:198),org.knime.core.node.workflow.NodeExecutionJob.run(NodeExecutionJob.java:117),org.knime.core.util.ThreadUtils$RunnableWithContextImpl.runWithContext(ThreadUtils.java:367),org.knime.core.util.ThreadUtils$RunnableWithContext.run(ThreadUtils.java:221),java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source),java.base/java.util.concurrent.FutureTask.run(Unknown Source),org.knime.core.util.ThreadPool$MyFuture.run(ThreadPool.java:123),org.knime.core.util.ThreadPool$Worker.run(ThreadPool.java:246)]}}
2024-09-25 12:27:21,526	ERROR Bar Chart 3:1581:0:1383:0:1380 Timeout during image generation. Employing fallback strategy of capturing a screenshot. Note that the returned image might not be rendered completely.
2024-09-25 12:27:22,209	ERROR Component Output 3:1581:0:1383:0:2 {internalError:{typeName:java.lang.NullPointerException,message:View settings were accessed before loaded,stackTrace:[java.base/java.util.Objects.requireNonNull(Unknown Source),org.knime.base.views.node.BaseViewsNodeView.getViewSettings(BaseViewsNodeView.java:120),org.knime.base.views.node.BaseViewsNodeView.lambda$2(BaseViewsNodeView.java:115),org.knime.core.webui.data.InitialDataService.getInitialData(InitialDataService.java:109),org.knime.core.webui.node.DataServiceManager.callInitialDataService(DataServiceManager.java:143),org.knime.gateway.api.entity.UIExtensionEnt.(UIExtensionEnt.java:120),org.knime.gateway.api.entity.NodeViewEnt.(NodeViewEnt.java:168),org.knime.gateway.api.entity.NodeViewEnt.create(NodeViewEnt.java:104),org.knime.gateway.api.entity.NodeViewEnt.create(NodeViewEnt.java:144),org.knime.js.cef.pagebuilder.PageBuilderUtil.lambda$3(PageBuilderUtil.java:180),org.knime.core.wizard.AbstractPageManager.createWizardPageInternal(AbstractPageManager.java:196),org.knime.core.wizard.CompositeViewPageManager.createWizardPage(CompositeViewPageManager.java:140),org.knime.js.cef.pagebuilder.PageBuilderUtil.initializePageBuilderForReportGeneration(PageBuilderUtil.java:182),org.knime.js.cef.headless.CEFHeadlessUtil.generateContent(CEFHeadlessUtil.java:211),org.knime.js.cef.headless.CEFHeadlessUtil.generateReport(CEFHeadlessUtil.java:135),org.knime.reporting2.porttype.ReportPortObject.fromExecutedComponent(ReportPortObject.java:131),org.knime.reporting2.ReportServiceImpl.createOutput(ReportServiceImpl.java:69),org.knime.core.node.port.report.ReportUtil.lambda$0(ReportUtil.java:94),java.base/java.util.Optional.map(Unknown Source),org.knime.core.node.port.report.ReportUtil.computeReportObject(ReportUtil.java:94),org.knime.core.node.workflow.virtual.subnode.VirtualSubNodeOutputNodeModel.execute(VirtualSubNodeOutputNodeModel.java:179),org.knime.core.node.NodeModel.executeModel(NodeModel.java:588),org.knime.core.node.ExtendedScopeNodeModel.executeModel(ExtendedScopeNodeModel.java:86),org.knime.core.node.workflow.virtual.subnode.VirtualSubNodeOutputNodeModel.executeModel(VirtualSubNodeOutputNodeModel.java:163),org.knime.core.node.Node.invokeFullyNodeModelExecute(Node.java:1286),org.knime.core.node.Node.execute(Node.java:1049),org.knime.core.node.workflow.NativeNodeContainer.performExecuteNode(NativeNodeContainer.java:594),org.knime.core.node.exec.LocalNodeExecutionJob.mainExecute(LocalNodeExecutionJob.java:98),org.knime.core.node.workflow.NodeExecutionJob.internalRun(NodeExecutionJob.java:198),org.knime.core.node.workflow.NodeExecutionJob.run(NodeExecutionJob.java:117),org.knime.core.util.ThreadUtils$RunnableWithContextImpl.runWithContext(ThreadUtils.java:367),org.knime.core.util.ThreadUtils$RunnableWithContext.run(ThreadUtils.java:221),java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source),java.base/java.util.concurrent.FutureTask.run(Unknown Source),org.knime.core.util.ThreadPool$MyFuture.run(ThreadPool.java:123),org.knime.core.util.ThreadPool$Worker.run(ThreadPool.java:246)]}}
2024-09-25 12:27:57,357	WARN WizardNodeView Unable to retrieve value from view
2024-09-25 12:28:22,522	ERROR Component Output 3:1581:0:1383:0:2 java.lang.InterruptedException

Threaddump as followss:

240925 Knime Interactive View Nullpointer Exception - Topic 83485.tdump.txt (80.7 KB)

Best
Mike

armingrudd · October 22, 2024, 2:29pm

Thank you @mwiegand for reporting this,

We created a ticket for it: UIEXT-2233

marc-bux · October 23, 2024, 8:52am

Hi @mwiegand,

As @armingrudd already said - thanks for bringing this to our attention. Unfortunately, we were unable to reproduce the issue as of yet.

Would it be possible for you to share the workflow with us (or a minimal example workflow that fails with similar error)?
Could you check whether you also run into the issue if you disable image generation / image output ports for the view nodes within the failing component?
Can you confirm that you are on AP 5.3.2?

Thanks in advance,

Marc

mwiegand · October 23, 2024, 10:55am

Hi @marc-bux,

yes, I am using the latest Knime version with all extenisons update. The issue persists since a view versions as the workflow impacted by it I created many month ago.

I am currently out of time to spare. Though, I roughly recall to have shared the workflow (a trimmed down version) with @DanielBog due to privacy concerns if shared the regular way.

Let me know in case the workflow got lost. I will try to find some time in the next days to share it once more.

Best
Mike